TEST on Electricity on May 21, 2014 Read ch. 20- and the Handouts

TEST on Electricity on May 21, 2014

Read ch. 20- and the Handouts

May 14, 2014IV w-up #8

• Why/ or why not? ___________________________________________________________________________________________________________

May 9, 2014IV w-up #7

1. A positive 6.0 x 10-9 C charge experiences a force of 1.8 x 10-5 N to the right. What is the electric field at location of that charge from other charges?

May 8, 2014IV- W-up # 6

1. A negative charge of -3.0 x 10-6 C and a positive charge of 4.0 x 10-6 C are separated by a distance of 3 mm. What is the force on the negative charge? (magnitude and direction)

May 1, 2014IV- W-up # 6

Balloons X, Y and Z are suspended from strings as shown below.

Negatively-charged balloon X attracts balloon Y and repels balloon Z. Balloon Y ____. List all that apply in alphabetical order with no spaces between letters.

a. must be positively-charged b. must be negatively-charged c. must be neutral d. may be either positively- charged or neutral• e. may be either negatively-charged or neutral

April 30, 2014IV- W-up #5

• A certain static discharge delivers -0.5 Coulombs of electrical charge. How many electrons are in this discharge?

April 29, 2014IV- W-up #4

• 1. ____ are the charged parts of an atom.

a. Only electrons b. Only protons

c. Neutrons only d. Electrons and neutrons

e. Electrons and protons

f. Protons and neutrons

2. ____ are negatively charged.

a. Only electrons b. Only protons

c. Neutrons only d. Electrons and neutrons

e. Electrons and protons f. Protons and neutrons

April 28,2014IV-W-up#3

1. A shirt that looks red when white light shines upon it will look ____when magenta light shines upon it.

2. What color does cyan absorb?

______________________________________________________________________

April 24, 2014IV-W-up #1

• Two lights - a Red light and a Blue light - are used to illuminate a white sheet of paper. When these light colors are mixed with equal intensities, the paper will appear ____.

• a. Magenta b. Blue c. Cyan• d. Red e. Yellow f. Black

N.B :[Already one day late(-10points off)]

Don’t Forget to turn in the followings:

1.Vocab-due on 4/18/14 and W-up #1-10

2.Color (Ch.14.2) worksheet

April 23, 2014W-up#10

1. What primary color(s) of light can be absorbed by yellow pigment (paint)?

a. red b. blue

c. green d. red and blue

e. red and green

W-up Due Today!!!!

Classwork-Ch.14.2

A day late penalty -20%

(No Exception)

April 21, 2014W-up #8

1. Light from red, green and blue spotlights shine on a sheet of paper. The paper contains cyan and magenta pigments. Which of the three primary light colors will be absorbed by the pigments?

• a. red b. green

• c. blue d. red and green

Red, green and blue spotlights shine on a red sheet of paper. Which of these three light colors will be absorbed by the sheet of paper?

a. Only the red. b. Only the blue.c. Only the green. d. Both the red

and the blue.e. Both the red and the green. ab.

Both the blue and the green.

April 21, 2014W-up #8

• Red, green and blue spotlights shine on a red sheet of paper. Which of these three light colors will be absorbed by the sheet of paper?

a. Only the red. b. Only the blue.

c. Only the green. d. Both the red and the blue. e. Both the red and the green.

ab. Both the blue and the green.

•

April 15, 2014W-up#6

• 19. The diagram below depicts light reflecting off a planar surface. If angle A is a 65-degree angle, then the angle of reflection is ____ degrees.

• a. 25

• b. 65

• c. 135

• d. 155

April 16, 2014III-W-up 7

• The diagram below depicts the path of four incident rays emerging from an object and approaching a mirror. Five lettered locations are shown on the opposite side of the mirror.

• • •

• Which location is representative of the image location?

•

April 14,2014III-W-up#5

• The diagram below depicts light reflecting off a planar surface. The incident and reflected rays are labeled. If ray A makes an angle of 25 degrees with the mirror surface, then the angle of reflection is _____ degrees.

• a. 25• b. 65• c. 135• d. 155

April 11, 2014III-W-up #4

1. Consider the visible light spectrum. Of the following listed regions of the spectrum, which consists of waves with the HIGHEST frequency?•a. orange b. blue c. red d. violet•e. yellow f. All of these have the same frequency.• VOCAB. QUIZ-

April 10, 2014 III-W-up#3

1. Consider the electromagnetic spectrum. Of the following listed regions of the spectrum, which consists of waves with the LOWEST frequency?

a. ultraviolet radiation b. visible light

c. Gamma rays d. infrared radiation______________________________________________________________________________________________________________________________________________________________________________________________

N.B.: Vocab Quiz on FRI. April 11,2014

April 9, 2014III-W-up#2

1. Name the two types of reflection and state their differences and similarities.

April 8, 2014III-W-up#1

1. A 450 nm light ray has what frequency?

2. How far does light travel in 2 minutes?

Which one of the diagrams represents the standing wave pattern for the first harmonic? If none apply, then enter 'E' as the answer.

March 25, 2014II-W-up#9


Which diagram below depicts the correct pattern of sound waves for a car moving away from an observer at a constant speed with the horn depressed?

1. What is the velocity of a wave with a wavelength of 5.6 cm and has a period of 8 seconds?

Turn –in your warm-up notebook today!!

20 points will be deducted for a day late submission!!!


1. Which diagram below depicts the correct pattern of sound waves for a car approaching an observer at a constant speed with the horn depressed?

March24,2014II-W-up#8


1. Waves typically transmit __________ .a. Energy only b. matter only

c. Both matter and energy d neither of these

March 19, 2014II- w-up#7

1. Why should a Military Brigade break a step when crossing a suspension bridge?

March18,2014Ii-w-up#6

What is the amplitude and the wavelength of the motion shown on the above graph?

March17,2014II w-up#5

• A standing wave pattern is established in a 246-cm long rope. A snapshot of the rope at a given moment in time is shown in the diagram below. Vibrations travel within the rope at speeds of 22.7 m/s. What is the frequency of vibration of the rope?


The wavelength of a wave on a string is 1 meter and its speed is 5 m/s. Calculate the frequency and the period of the wave.

QUIZ#2 on Friday March 7, 2014

Vocabulary Due on March 7, 2014 No late work is accepted!!!


Which diagram shows a wave with the shortest wavelength and the lowest amplitude?

March3, 2014II. W-up#2

•

• What is the wavelength of the motion shown on the above graph?

Feb.27, 2014II. W-up#1

• What is Wave? ___________________________________________________________________

Feb.18, 2014W-Up#9

• Give Two examples for :

• A) Good conductors ______, _________

• B) Good Insulators _______, _________

Feb.17, 2014W-up #8

• Why does your hand feel cool if you spill some alcohol on it?

Feb. 14,2014W-up #7

• Why do you think the Midwest states have a colder winters and the hotter summers compared to the Coastal states?

• IMPORTANT!!!!

• YOUR LAB REPORT HAS TO BE TURNED IN TODAY

W-up#8

• Why does your hand feel cool if you spill some alcohol on it? The alcohol needs energy to evaporate (change of state from liquid to a gas). It takes away heat from your hand and uses that energy to evaporate. Your hand looses heat energy and therefore feels cooler.

Feb.12,2014W-up#6

• What is temperature?

Like any problem in physics, the solution begins by identifying known quantities and relating them to the symbols used in the relevant equation. In this problem, we know the following:

m = 450 g C = 4.18 J/g/°C Tinitial = 15°C Tfinal = 85°C We wish to determine the value of Q - the quantity of heat. To do so, we would use the equation Q = m•C•ΔT. The m and the C are known; the ΔT can be determined from the initial and final temperature.

T = Tfinal - Tinitial = 85°C - 15°C = 70.°C With three of the four quantities of the relevant equation known, we can substitute and solve for Q.

Q = m•C•ΔT = (450 g)•(4.18 J/g/°C)•(70.°C) Q = 131670 J Q = 1.3x105 J = 130 kJ (rounded to two significant digits)

Feb.19,2014W-up#10

1. What quantity of heat is required to raise the temperature of 450 grams of water from 15°C to 85°C? The specific heat capacity of water is 4.18 J/g/°C.

•

Bonus• The high specific heat capacity of water

has a great deal to do with regulating extremes in the environment. For instance, our fish in the pond is indeed happy because the heat capacity of the water in his pond is above means the temperature of the water will stay relatively the same from day to night. He doesn't have to worry about either turning on his air conditioner or putting on his woolen flipper gloves.

• This same concept can be expanded to a world-wide scale. The oceans and lakes help regulate the temperature ranges that billions of people experience in their towns and cities. Water surrounding or near cities take longer to heat up and longer to cool down than do land masses, so cities near the oceans will tend to have less change and less extreme temperatures than inland cities. This property of water is one reason why states on the coast and in the center of the United States can differ so much in temperature patterns. A Midwest state, such as Nebraska, will have colder winters and hotter summers than Oregon, which has a higher latitude but has the Pacific Ocean nearby.

Feb. 10, 2014W-up#4

• Do cold objects contain heat energy? Explain

Feb.11,2014W-yup#5

• Calculate the specific heat capacity of a piece of wood if 1000 g of the wood absorbs 60,000 joules of heat, and its temperature changes from 360 C to 42 0 C.

REMINDER!!!

• PROJECT DUE ON FEB. 14, 2014

Feb. 7,2014W-up #3

• List the three kinds of heat transfer methods and the three popular temperature scales:

• 1_____________ __________

• 2. _____________ _________

• 3. _____________ __________

Feb.6/14W-up #2

• As the temperature of a gas in an enclosed container increases, the pressure of the gas also increases. This is because —

A.as it gets hot, the container expands

B. the kinetic energy of the gas particles

increases, and they hit the container

wall with greater speed

C. the temperature increases the

gravitational potential energy of the gas

D the temperature increase causes an

increase in specific heat, which leads to

a higher pressure

Jan,.29,2014W-up#8

• A child slides down a frictionless slide from a height of 1.8 m. How fast will she be going at the bottom of the slide?

Jan.30,2014W-up #9

1. How much work and power is to lift a 20 kg sack of potatoes vertically 6.5 m in 10 seconds?

Jan.31, 2014W-up#10

• 1. The lowest possible temperature , in degree Celsius is _______ and in kelvins is __________.

• Important!!! Turn-in your W-up notebook for grade today!! I accept your w-up only if it is on your notebook, dated and questions and answers are written.

• No late submission and no exception!!!!

Feb.4,2014W-up #1

• Convert the following temperature values to their assigned units.

a)50 o F = __________ 0 C

b)200 C = __________ 0 F

c)10 K = _________________ 0 C

d)10 K = __________ 0 F

What is Due today?

1. Key Terms and

2. Ch.12 Study Guide

Jan.23, 2014w-up#7

• A diver of mass m drops from a board 10.0 m above the water surface, as in the Figure. Find his speed 5.00 m above the water surface. Neglect air resistance.

• TEST on FRIDAY!!!

Jan. 22,2014W-up#6

Jan. 21, 2014W-up#5

1.How much work is to lift a 30 kg sack of potato vertically 9.8 m?

New Project: A vehicle powered by Energy—”Mouse Trap Car Design!”

Jan.16, 2014W-Up#4

1. A motor lifts a 200 kg object straight up at a constant speed of 3.00 cm/sec. What power is being developed by the motor? Express your answer in watts and horsepower.

• Project is Due on Jan. 17, 2014 (Friday)!!!

Jan.15, 2014W-Up#3

1. What is the power of 50 J work done in 10 sec?

2. What is the work of 60 W bulb working for 30 sec?

Research Project Due on Jan. 17, 2014

Jan.14,2014W-Up#2

1. A glass of water weighs about 2 N. If you lift it 0.5 m to your mouth in one second, how much work does it take and how much power is needed?

Jan.13,2014Warm-up #1

1.How much work does a kid do while sitting? The kid weighs 45N

2. It takes a force of 10 N to push an object across a distance of 4 m. How much work is done?

Research Project Due on Jan. 17, 2014!!

TEST #6 (Read Chapter 8)

• Friday Nov.15,2013

• Testing On: Circular Motion

Review#2

Use the equation for acceleration to determine

the acceleration for the following two motions.

12-09-13Review W-up#1

At each marked position, the coach makes a "U-turn" and moves in the opposite direction. In other words, the coach moves from position A to B to C to D.

What is the coach's average speed and average velocity?

12-05-13PartVI-w-up#10

• A 5-N force is applied to a 3-kg ball to change its velocity from +9 m/s to +3 m/s. The impulse is encountered by the ball for a time of ___________ seconds.

• ( Hint: F . T = Δ P = m Δ V )

• You Need to turn in Your W-up Notebook for grade.(one day late cost you 20points)

12-04-13Part VI-W-up#9`

• A ball with a mass of 0.25 kg and an initial velocity of 1.45 m/s has a head- on elastic collision with a 0.45 kg ball with an initial velocity of -2.25 m/s. After the collision, the 0.45 kg ball has a velocity of -0.84 m/s. Calculate the final velocity of the 0.25 kg ball. (Assume the momentum is conserved.)

• Given: unknown:

Equation(Formula)

• Solve:

2. A ball is moving at 4 m/ s and has a momentum of 48 kg.m/ s. What is the ball's mass?

•a. 4 kg

•b. 12 kg

•c. 48 kg

•d. 192 kg

•e. none of these

12-03-13Part VI-W-up #8

• . A 1000-kg car traveling at 50 m/s runs into the rear of a stopped car that has a mass of 1500 kg and they stick together. What is the speed of the cars after the collision?

• a. 5.0 m/s

• b. 10 m/s

• c. 15 m/s

• d. 20 m/s

• e. 25 m/s

Key W-up #7

• Momentum is the quantity of motion. The equation for momentum is mass x velocity.

• Conservation of Momentum means that momentum is conserved when two objects interact if an outside force does not interfere. An example of an outside force is friction.

Dec.2, 2013part VI-W-up #7

• 1. What is momentum? What is meant by conservation of Momentum?

Class practice Problems

• Page 210

• Q#7-12 Due Today in class (11-21-13)

• Read practice problem Page 209 before you attempt to do the assigned problems!!!!

• Known: Unknown:

• Ma =84 kg Va2=?

• Mb = 0.035 kg

• Va1 = Vb1= 0m/s

• Vb2= -875m/s

Calculations :

P = pa1 + Pb1 =0

11-21-13Part VI-w-up#6

• An Astronaut at rest in space fires a thruster piston that expels 35 g of hot gas at 875m/s. The combined mass of the astronaut and piston is 84 kg. how fast and in what direction is the astronaut moving after the piston?

Solution W-up#5)

• answer: We’ll use Fnet t = Δ p. Since the ball changes direction, Δ p = m Δ v = m (vf - v0) = 1.3 [22 - (-13)] = (1.3 kg) (35 m/s) = 45.5 kg · m /s. Thus, t = 45.5 / 1200 = 0.0379 s, which is just under 40 ms

11-20-13PartVI-W-up#5

• A 1.3 kg ball is coming straight at a 75 kg soccer player at 13 m/s who kicks it in the exact opposite direction at 22 m/s with an average force of 1200 N. How long are his foot and the ball in contact?

Solution#4• Answer: 2

• Because time for each interaction part is the same, impulses and momentum changes also occur in equal and opposite pairs. But not necessarily accelerations, because the masses of the interaction may differ. Consider equal and opposite forces acting on masses of different magnitude.

F

m aFm a

11-19-13W-up#4

Whenever an interaction occurs in a system, forces occur in equal and opposite pairs. Which of the following do not always occur in equal and opposite pairs?1. Impulses.2. Accelerations.3. Momentum changes.4. All of these occur in equal and opposite pairs.5. None of these do.

Solution w-up#3

11-18-13Part VI-W-up#3

Determine the momentum of each the followings…

11-14-13Part VI-w-up#2

1. acceleration is? A. B. C.

1. A car moves around a circular path of a constant radius at a constant speed. At the moment of the car’s location its acceleration is?

11-13-13Part VI-W-up #1

1. A car moves around a circular path of a constant radius at a constant speed. At the moment of the car’s location its velocity is?

A. B. C. D. E.

1. A car moves around a circular path of a constant radius at a constant speed. At the moment of the car’s location its velocity is?

11-12-13Part-V-W-up#10 (Turn-in Today)1. A certain string just breaks when it is under 400 N of

tension. A boy uses this string to whirl a 10-kg stone in a horizontal circle of radius 10 m. The boy continuously increases the speed of the stone. At approximately what speed will the string break? Assume the tension force is directed horizontally.a.10 m/sb.20 m/sc.80 m/sd.100 m/se.400 m/s

11-11-13Part V-W-up#9

1.On the moon, a 0.25-kg ball attached to a string is rotating in a horizontal circle of radius 0.5 m. Assume the tension force is directed horizontally. If the ball has an angular velocity of 2 rev/s, what is the tension in the string?a.2 Nb.5 Nc.7 Nd.10 Ne.20 N

11-07-13Part V- W-up#8

1. The driver of an automobile must carefully control each of the following devices. Which of these devices can cause an acceleration in a moving car?

• 1) the brake pedal 2) the gas pedal 3) the steering wheela.Only #1b.Only #2c.Only #3d.Only #1 and #2e.Numbers 1, 2, and 3

Quiz Time

11-06-13Part V-w-up#7

1.If the axis of rotation is inside the object, the object is ________________, while If the axis of rotation is outside the object, the object is________________.

#7

11-04-13Part V-W-up#5

1. If the mass of a planet near the Sun were doubled, the force of attraction would __________.

a. be squared

•b. be doubled

•c. remain constant

•d. be one half as strong

11-01-13Part-V W-up #4

• 3. If you weigh 500.0 N on Earth's surface, how much would you weigh on the planet Jupiter? Jupiter has a mass of 1.90 × 1027 kg and a radius of 71.5 × 106 m.

• a. 1.26 N c. 1270 N

• b. 126 N d. 1.24 × 104 N• Testing Time!!!!• •

• •

10-31-13Part V-W-up#3

1.If the distance between two masses is tripled, the gravitational force between them becomes

a.1/9 as great b. 1/3 as great

c. 3 times as great d. 9 times as great

• You are in ‘freefall’ with no force pushing back in the ‘up’ direction. It is NOT that you are too far away to be influenced by gravity. Mass is measured by an inertial balance device (e.g., an astronaut strapped to oscillating chair).

10-30-13Part-V W-up#2

• Consider two satellites in orbit about a star (like our sun). If one satellite is twice as far from the star as the other, but both satellites are attracted to the star with the same gravitational force, how do the masses of the satellites compare?

• QUIZ Time

10-29-13Part V-W-up#1

1. In what sense are you weightless in orbit around the Earth? How is mass measured?

10-28-13Part-IV W-up #10 (Grading time)

• ___________ T/F.1. Every mass is attracted to every other mass. The force of attraction is larger for larger masses and larger for masses close together

• Turn-in your w-up Notebook for Grade!!!

Explanation for w-up #8

• Remember that inertia is a measure of an object's resistance to a change in its state of motion - look up in your notes how inertia is measured.

10-24-13W-up#9

• 1. Which of the following objects has the greatest inertia?

a. a 2-kg mass moving at a constant velocity of 100 m/s, E

b. a 4-kg mass moving at a constant velocity of 2 m/s, E

c. a 2-kg mass moving at a constant velocity of 20 m/s, E

d.a 6-kg mass at rest

10-24-13Part-IV W-up#9

10-23-13Part IV-W-up#7

• Determine the magnitude of the unknown forces

10-22-13Part –IV W-up#6

1. A ball is left in the bed of a pickup truck. When the truck accelerates forward, the ball rolls to the back of the bed. What happens when the truck stops?

a) It is thrown harder against the back.

b) It rolls to the front of the bed.

c) The ball’s inertia keeps it at the back.

d) the ball is not affected by the stopping (deceleration).

Solution for w-up#5

1. How much force is needed to accelerate a 1400 kilogram car 2 meters per second/per second?•Write the formula•F = m x a•Fill in given numbers and units•F = 1400 kg x 2 meters per second/second•Solve for the unknown

•2800 kg-meters/second/second or 2800 N

10-21-13Part –IV W-up #5

1. How much force is needed to accelerate a 1400 kilogram car 2 meters per second/per second?•Write the formula

10-18-13Part IV W-up #4

1. When mass is in kilograms and acceleration is in m/s/s, the unit of force is in _______________ .

•Quiz Time

•Use your HW –Vocabulary and Lecture Notes for this Quiz!!!- Because it is Friday

#3

• INERTIA

• the tendency of an object

• to resist any change in its motion

• MASS

• a quantitative measure of inertia

10-17-13Part-IV -W-up#3

• What is inertia? What is mass/?

• ______________________________________________________________________________________________________

• Today

• Note Taking

10-14-13Part IV W-up #2

1. What is the initial velocity?

2. How long will it be in the air?

3. How far away (Range) will it lands?

Define the following Terms using your textbook

Part I

• action-reaction• coefficient of friction• kinetic and static friction• inertial frame of reference• inertia• force sensors• push or pull• mass• Newton’s laws of motion

Part II• Force – • Acceleration – • Free body diagram – • Weight – • Net force – • Normal force – • Friction – • Torque –• Vocab. Test on Friday Oct.

18th, 2013


• Force – • Inertia – • Acceleration – • Free body diagram – • Weight – • Mass – • Net force – • Normal force – • Friction – • Torque –


• Force – a push or pull on an object• Inertia – the resistance of an object to a change in motion• Acceleration – rate of change in velocity of the motion of an object• Free body diagram – a diagram of all forces acting on an object drawn

as vectors outward from the center• Weight – the gravitational force that an object exerts due to its mass• Mass – the amount of matter an object contains, a measurement of

inertia• Net force – sum of all force vectors into a combined or total force• Normal force – force exerted perpendicular to the surface an object

rests on (support force)• Friction – force opposing motion caused by the interaction of surfaces• Torque – the product of the force and the lever arm that may cause

rotational motion

10-14-13Part-IV:W-up#1

T/F 1. objects with more mass “push harder” than objects with less mass.

T/F 2. objects with more mass experience greater acceleration due to gravity than objects with less mass.

T/F 3. a constant force must be applied to an object for it to remain in motion.

T/F 4. even without friction, objects in motion would still eventually stop moving.

10-10-13Part-III W-up#10

1. Ball A is dropped from a window. At the same instant, ball B is thrown downward and ball C is thrown upward from the same window. Which statement concerning the balls is necessarily true if air resistance is neglected?

A) At one instant, the acceleration of ball C is zero.

B) All three balls strike the ground at the same time.

C) All three balls have the same velocity at any instant.

D) All three balls have the same acceleration at any instant.

E) All three balls reach the ground with the same velocity.


1. A car starts from rest and accelerates at a constant rate in a straight line. In the first second the car covers a distance of 2.0 meters. How much additional distance will the car cover in the second second.

•A) 2.0 m C) 6.0 m E) 12.5 m

•B) 4.0 m D) 8.0 m

10-08-13Part-III W-up #8

1. Starting from rest, a particle that is confined to move along a straight line is accelerated at a rate of 4 m/s2. After 10 seconds how far will the particle have traveled?

•A) 20 m C) 100 m E) 400 m

•B) 40 m D) 200 m


1. Suppose that an object is moving with constant

acceleration. Which of the following is an accurate

statement concerning its motion?

A) In equal times its speed increases by equal amounts

B) In equal times it velocity changes by equal amounts.

C) In equal times it moves equal distances.

D) None of the above is true.


1. A car travels in a straight line covering a total distance of 90.0 miles in 60.0 minutes. Which statement concerning this situation is true?•A) The velocity of the car is constant.•B) The acceleration of the car must be non-zero.•C) The first 45 miles must have been covered in 30•minutes.•D) The speed of the car must be 90 miles per hour•throughout the entire trip.•E) The average velocity of the car is 90 miles per•hour in the direction of motion.


1. A truck accelerates from 10 m/s to 30 m/s in 2.0 seconds. What is the acceleration?

2. A car is traveling along a road. Its velocity is recorded as a function of time and is shown in the graph below. During which intervals is the car accelerating?

Which graph would best depict the following scenario? A man starts at the origin, walks back slowly and steadily for 6 seconds. Then he stands still for 6 seconds, then walks

forward steadily about twice as fast for 6 seconds. Note that these are

velocity-time graphs.


• Below is a graph of a balls motion. Which of the following gives the best interpretation of the ball’s motion?

• The ball moves along a flat surface. Then it moves forward down a hill, and then finally stops.

• The ball doesn’t move at first. Then it moves forward down a hill and finally stops.

• The ball is moving at constant velocity. Then it slows down and stops.

• The ball doesn’t move at first. Then it moves backwards and then finally stops.

• The ball moves along a flat area, moves backwards down a hill and then it keeps moving.

•

10-01-13Part-iii W-up #3

• A car started from a rest and accelerated at 9.54 m/s2 for 6.5 seconds. How much distance was covered by the car?


• A car moving at 25 mph accelerates uniformly at a rate of 3.0 mph/s for 4.0 s. How fast is it going at the end of this time?


• What is the average velocity if a car moved 50 km in 2 hours?

• Part-II W-up (#1-10) Check-up

• All lab reports have to be turned –in

• A) Accuracy & Precision lab for partial credit only!!!!

9-25-13Part-II w-up#10

Use the equation for acceleration to determine

the acceleration for the following two motions.

W-up #9

At each marked position, the coach makes a "U-turn" and moves in the opposite direction. In other words, the coach moves from position A to B to C to D.

What is the coach's average speed and average velocity?

• At each marked position, the coach makes a "U-turn" and moves in the opposite direction. In other words, the coach moves from position A to B to C to D.

• What is the coach's average speed and average velocity? When finished, click the button to view the answer.

9-24-13Part-Ii w-up # 9

• A car moved 20 km East and 60 km West in 2 hours. What is its average velocity?

• How far will a car travel in 15 min at 20 m/s?

W-up#8 9-23-13the skier moves from A to B to C to D.

9-23-13Part-II w-up# 8

1. What is speed? What is its SI unit?

_____________________________________________________________________________________________________

9-20-13Part-II w-up#7

• 1. The measurement of the shortest distance and direction of an object’s final position away from its point of origin is ___ while the measurement of the total actual path that an object travels is __________

• QUIZ Time

NO Cell Phones !!9-19-13

Part-II w-up#6• While Mirrianne is on a camping trip with

her girl scout troop, the scout leader hands each girl a compass and a map. The directions on Mirrianne’s map read as follows: “walk 500 m north, 200 m east, 300 m south, and 400 m west.” If she follows the map, what is Mirrianne’s displacement? Solve graphically.

9-5-13W-up#6

• Time limit = 5 minutes

• Write the Question and Answers

• 1 in= 2.54 cm

• 1 cm= 0.394in

• 1 ft= 30.5 cm

• 1 m= 39.37 in = 3.28 ft

• 1 mile = 5280 ft =1.61 km

• 1 gallon =4 qt = 3.79 L

9-18-13Part-II W-up #5

• Why is speed a scalar quantity not a vector quantity?

• Vector - quantity with both magnitude (size) and direction

• Vectors:

• Displacement

• Velocity

• Acceleration

• Momentum

• Force

• Scalar - quantity with magnitude only Scalars:

• Distance

• Speed

• Time

• Mass

• Energy

9-17-13Part-II W-up #4

1.) What is a scalar quantity? Give Three examples.

2. What is a vector quantity? Give three exaples.

9-16-13Part –II W-up#3

• How many micro grams ( µg) is 86.0 kg ? Express your answer in scientific

notation

• Sit in your Lab Group!!

9-13-13Part II-W-up#2

• 1.) Round off to the indicated number of sig. figures

a) 404.67 to 4 sf’s ________________

b) 0.08483 to 2 sf’s _______________

Make the following conversions

2.5 x 10-4 g to _________ mg

9/12/13Part II- W-up #1

1.Yolanda determined the melting of a substance to be 34.5 percent. Find the percent error of her measurement if the actual melting point is 41.2 percent?

2. Two Physicist determined the density of a liquid three times. The values they obtained were 2.84 g/mL, 2.85 g/mL, 2.80 g/mL. The accepted value is known to be 2.40 g/mL

a.) Are these experimental values precise? Explain.

b.) Are these values accurate? Explain.

c.) Find the percent error.

9-11-13W-up#10

• A well-constructed graph consists of five major parts: the title, _____________ variable, _______________ variable, and the scales for each variable. The __________ describes what the graph is about. By reading the title, the reader should get an idea of what the graph is about

9-10-13W-up #9

• The molar mass of Butane is 60. 14 grams per mol. Using your lab data, you calculated the molar mass of Butane as 54.2 grams per mol. Find the percent error of your measurement.

9-9-13W-up #8

Perform the following SI unit conversions (watch sig figs!)

1.) 177 mL =________ L

2.) 54,400 micro meter = _______deci meter

3. ) 0.093 Kg = _______ mg

#6

• Convert the following measurement to a given unit

• 1.) 125006 gram = ________ kg

• 2.) 100kg = ___________ Mg

• 3.) 2005 micro gram = _______ gram

9-6-13w-up #7

• How many sig. figures are there?

• 0.010101010000 meters = ____________

• QUIZ TIME

WARM UP#4 9-03

Time limit = 5 minutes

Write the Question and Answers

List the SI units for each of the following:

a. Distance

b. Time

c. Mass

d. Temperature

Time is up.


a. Distance

b. Time

c. Mass

d. Temperature


a. Distance = meters (m)

b. Time

c. Mass

d. Temperature



b. Time = seconds (s)

c. Mass

d. Temperature




c. Mass = kilograms (kg)

d. Temperature




c. Mass = kilograms (kg)

d. Temperature = Kelvin (K)

Compare and contrast pure science and applied science

pure research

applied research

09/04/13W-up#5

• How many sig. figures are there?• 3401= ________• 2100 =________• 2100.0 = ________• 5.00 = ________• 0.00412 = ________• 8,000,050,000 = ________

• How many sig. figures are there?• 3401= ____4____• 2100 =________• 2100.0 = ________• 5.00 = ________• 0.00412 = ________• 8,000,050,000 = ________

• How many sig. figures are there?• 3401= __4______• 2100 =__2______• 2100.0 = ________• 5.00 = ________• 0.00412 = ________• 8,000,050,000 = ________

• How many sig. figures are there?• 3401= _4_______• 2100 =__2______• 2100.0 = ____5____• 5.00 = ________• 0.00412 = ________• 8,000,050,000 = ________

• How many sig. figures are there?• 3401= _4_______• 2100 =__2______• 2100.0 = _5_______• 5.00 = ___3_____• 0.00412 = ________• 8,000,050,000 = ________

• How many sig. figures are there?• 3401= __4______• 2100 =_2_______• 2100.0 = _5_______• 5.00 = ____3____• 0.00412 = ____3____• 8,000,050,000 = ________

• How many sig. figures are there?• 3401= _4_______• 2100 =___2_____• 2100.0 = ___5_____• 5.00 = ____3____• 0.00412 = __3______• 8,000,050,000 = ___7_____

Documents

TEST on Electricity on May 21, 2014 Read ch. 20- and the Handouts