1. which has more denisty, a bushel of apples or 10 bushels of apples?
a.1
b.10
c. the same
4. Compared to the density of a kilogram of feathers, the density of a kilogram of lead is
a.less
b.more
c.the same
3.A dome shaped house is more heat efficient that a rectangular house because a dome has
a. less area compared to it’s volume
b.no corners to radiate heat
c. less inner space
d. all of the above
e. none of the above
4. In cold weather, your hands will be warmer if you wear
a.mittens
b.gloves
c. a or b, no difference
5. A metal anchor has a denisty of 3000 kg per cubic meter and volume of 6 cubic meters. what is the mass?
a.250 kg
b.500 kg
c. 3000 kg
d.18,000 kg
e. none of the above
6.the reason objects immeresed in a fluid expeirence an upward buoyant forse is because fluid pressure on the bottom is greater than the top
a.true
b.false
7. the denisty of a submerged submarine is the same as a
a.iron
b.crab
c.a floating submarine
d. water
e. none of the above
8. if an obkect has greater denisty than the denisty of water, it will
a. float
b.sink
c. nether float or sink.
9. compared to an empty ship, the same ship loaded with plastic foam will float
a.at the same level in water
b.lower
c.higher
10.two equal sized buckets are filled to the top with water. one has a piece of wood floating in it, making it’s total weight
a. more than the other
b. less than the other
c. the same
11. a block of balsa wood floats on water while a block of lead the same size lies sumberged in the water. the buoyant force is:
a. greater on the lead
b. greater on the balsa
c. the same for both
12. when an ice cube in a glass of water melts, the watr level
a. rises
b. stays the same
c. falls
16. the principle reason a hydrolic press works is that it has an exception to energy conservarion
a.sometimes true
b. always true
c. always false
14.suppose a stone weighs 8 N in the air, but in water it weighs only 5 N. what is the buoyant force?
Thanks for answers. answer as much as you can!
EASY 10 POINTS!!!! I NEED ANSWERS BY TONIGHT!!!
1. c
4. b
3. a
4. a
5. d
7. d
8. b
9. b
10. c
12. b
16. c
14. 3 N
1. c
4. b
3. a
4. a
5. d
7. d
8. b
9. b
10. c
12. b
16. c
14. 3 N
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