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SPRING FINAL REVIEW TRIVIA
ROUND 1
QUESTION 1
•A DEVICE THAT MAKES WORK EASIER
BY CHANGING THE SIZE OR DIRECTION
OF FORCE IS CALLED WHAT?
ANSWER 1
•MACHINE
QUESTION 2
•HOW MANY ELECTRONS DOES IRIDIUM HAVE IF ITS STABLE STATE ITS ATOMIC NUMBER IS 77 AND ITS ATOMIC MASS IS 192?
ANSWER 2
•77 ELECTRONS
QUESTION 3
•YOU WANT TO LIFT A BOX THAT WEIGHTS
60 N. IF THE MECHANICAL ADVANTAGE OF
YOUR LEVER IS 3, HOW MUCH FORCE
WILL YOU NEED TO APPLY TO DO THE
JOB?
ANSWER 3
•FLOAD
•FAPPL
•20 N
QUESTION 4
•THE FORMULA FOR COPPER SULFATE
IS CU(S04)2. IF THE SULFATE ION HAS A
CHARGE OF -1, WHAT IS THE CHARGE OF THE COPPER ION?
ANSWER 4
•+2
QUESTION 5
•AN OBJECT THAT IS SEMI-TRANSPARENT IS ALSO SAID TO BE…
ANSWER 5
•TRANSLUCENT
ROUND 2
QUESTION 1
•HOW QUICKLY WORK IS DONE IS
CALLED….
ANSWER 1
•POWER
QUESTION 2
•HOW CAN YOU CALCULATE THE
MECHANICAL ADVANTAGE OF A
PULLEY?
ANSWER 2
•COUNT THE NUMBER OF ROPES OTHER THAN THE EFFORT ROPE
QUESTION 3
•ON EARTH AN ASTRONAUT HAS A MASS OF 200 KG. WHEN HE GOES TO PLANET X WHERE THE GRAVITY IS ¼ THAT OF EARTH, WHAT WILL HIS MASS BE?
ANSWER 3
•200 KG
QUESTION 4
•WRITE THE CORRECT BINARY FORMULA FOR POTASSIUM CARBONATE IF THE POTASSIUM HAS A CHARGE OF +3 AND THE CARBONATE (CO) HAS A CHARGE OF -2
ANSWER 4
•K2(CO)3
QUESTION 5
• SUE STICKS ONE END OF A METAL ROD INTO A BOX FILLED WITH ICE. THE END OF THE ROD THAT IS COVERED WITH ICE BECOMES COLD. AFTER A WHILE SUE PLACES HER HAND ON THE UPPER END OF THE ROD OUTSIDE THE BOX AND FEELS THAT IT IS COLD. WHY DID THIS HAPPEN?
ANSWER 5
•THE METAL ROD LOST HEAT TO THE ICE. BY LOSING HEAT, THE METAL ROD FEELS COLDER.
ROUND 3
QUESTION 1
•THE USE OF FORCE TO MOVE AN
OBJECT OVER A DISTANCE IS KNOWN
AS…
ANSWER 1
•WORK
QUESTION 2
•WHAT COMPARES A MACHINE’S WORK
OUTPUT WITH ITS WORK INPUT?
ANSWER 2
•MECHANICAL EFFICIENCY
QUESTION 3
•BALANCE THIS EQUATION
NH4CL + CA(OH)2-----> CACL2+
NH3+ H2O
ANSWER 3
2NH4CL + CA(OH)2-----> CACL2+ 2NH3+
2H2O
QUESTION 4
•A SOLID RUBBER BALL SINKS WHEN PLACED IN WATER. IF YOU CUT THE BALL IN HALF AND PLACE ONE HALF IN THE WATER, THE BALL WILL STILL SINK. EXPLAIN WHY.
ANSWER 4
• IT’S DENSITY HASN’T CHANGED BECAUSE YOU’VE CHANGED THE MASS AND VOLUME PROPORTIONALLY.
QUESTION 5
•THE NET FORCE ACTING ON A MOVING OBJECT IS 0 N. DESCRIBE THE MOTION OF THE OBJECT.
ANSWER 5
•THE OBJECT WILL CONTINUE MOVING IN THE SAME DIRECTION IT IS MOVING (IT’S MOTION WILL NOT CHANGE)
ROUND 4
QUESTION 1
•HOW MANY ELECTRONS DOES 14SI-2
ANSWER 1
•16 ELECTRONS
QUESTION 2
•WHAT TYPE OF LEVER IS THIS:
ANSWER 2
•2ND CLASS LEVER
QUESTION 3
•WHEN A MACHINE INCREASES THE
DISTANCE OVER WHICH A FORCE IS
EXERTED, WHAT HAPPENS TO THE SIZE
OF THE FORCE EXERTED?
ANSWER 3
•THE FORCE DECREASES
QUESTION 4
WHAT RESISTANCE WOULD PRODUCE A CURRENT OF 100 AMPS FROM A 12-V BATTERY?
ANSWER 4
•0.12 OHMS
QUESTION 5
•A LIGHT BULB USES .75 AMPS OF FROM A SOURCE OF 130 VOLTS. HOW MUCH POWER IS USED?
ANSWER 5
•91 WATTS