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