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(S0 4 ) 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 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 K 2 (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 NH 4 CL + CA(OH) > CACL 2 + NH 3 + H 2 O

ANSWER 3 2NH 4 CL + CA(OH) > CACL 2 + 2NH 3 + 2H 2 O

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 14 SI -2

ANSWER 1 16 ELECTRONS

QUESTION 2 WHAT TYPE OF LEVER IS THIS:

ANSWER 2 2 ND 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 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