1. SPRING FINAL REVIEW TRIVIA

2. ROUND 1

3. QUESTION 1 A DEVICE THAT MAKES WORK EASIER BY CHANGING THE SIZE OR DIRECTION OF FORCE IS CALLED WHAT?

4. ANSWER 1 MACHINE

5. QUESTION 2 HOW MANY ELECTRONS DOES IRIDIUM HAVE IF ITS STABLE STATE ITS ATOMIC NUMBER IS 77 AND ITS ATOMIC MASS IS 192?

6. ANSWER 2 77 ELECTRONS

7. 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?

8. ANSWER 3 FLOAD FAPPL 20 N

9. 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?

10. ANSWER 4 +2

11. QUESTION 5 AN OBJECT THAT IS SEMI-TRANSPARENT IS ALSO SAID TO BE…

12. ANSWER 5 TRANSLUCENT

13. ROUND 2

14. QUESTION 1 HOW QUICKLY WORK IS DONE IS CALLED….

15. ANSWER 1 POWER

16. QUESTION 2 HOW CAN YOU CALCULATE THE MECHANICAL ADVANTAGE OF A PULLEY?

17. ANSWER 2 COUNT THE NUMBER OF ROPES OTHER THAN THE EFFORT ROPE

18. 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?

19. ANSWER 3 200 KG

20. 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

21. ANSWER 4 K 2 (CO) 3

22. 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?

23. ANSWER 5 THE METAL ROD LOST HEAT TO THE ICE. BY LOSING HEAT, THE METAL ROD FEELS COLDER.

24. ROUND 3

25. QUESTION 1 THE USE OF FORCE TO MOVE AN OBJECT OVER A DISTANCE IS KNOWN AS…

26. ANSWER 1 WORK

27. QUESTION 2 WHAT COMPARES A MACHINE’S WORK OUTPUT WITH ITS WORK INPUT?

28. ANSWER 2 MECHANICAL EFFICIENCY

29. QUESTION 3 BALANCE THIS EQUATION NH 4 CL + CA(OH) 2 -----> CACL 2 + NH 3 + H 2 O

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

31. 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.

32. ANSWER 4 IT’S DENSITY HASN’T CHANGED BECAUSE YOU’VE CHANGED THE MASS AND VOLUME PROPORTIONALLY.

33. QUESTION 5 THE NET FORCE ACTING ON A MOVING OBJECT IS 0 N. DESCRIBE THE MOTION OF THE OBJECT.

34. ANSWER 5 THE OBJECT WILL CONTINUE MOVING IN THE SAME DIRECTION IT IS MOVING (IT’S MOTION WILL NOT CHANGE)

35. ROUND 4

36. QUESTION 1 HOW MANY ELECTRONS DOES 14 SI -2

37. ANSWER 1 16 ELECTRONS

38. QUESTION 2 WHAT TYPE OF LEVER IS THIS:

39. ANSWER 2 2 ND CLASS LEVER

40. QUESTION 3 WHEN A MACHINE INCREASES THE DISTANCE OVER WHICH A FORCE IS EXERTED, WHAT HAPPENS TO THE SIZE OF THE FORCE EXERTED?

41. ANSWER 3 THE FORCE DECREASES

42. QUESTION 4 WHAT RESISTANCE WOULD PRODUCE A CURRENT OF 100 AMPS FROM A 12-V BATTERY?

43. ANSWER 4 0.12 OHMS

44. QUESTION 5 A LIGHT BULB USES.75 AMPS OF FROM A SOURCE OF 130 VOLTS. HOW MUCH POWER IS USED?

45. ANSWER 5 91 WATTS