A fossil is found in a layer of strata below one layer dated at 8 million years. From this we can deduce the age of the fossil to be
A) between 7 and 8 million years old
B) we can tell nothing about the fossil's age from this data
C) older than 8 million years
D) younger than 7 million years
Question 2A boy releases his 2.0 kg toy, from rest, at the top of a sliding-pond inclined at 20 above the horizontal. What will the toy's speed be after sliding 4.0 m along the sliding-pond? The coefficient of kinetic friction is 0.20.
A) 3.0 m/s
B) 4.4 m/s
C) 2.2 m/s
D) 5.2 m/s
E) 3.5 m/s
Question 3What happens to a simple pendulum's frequency if both its length and mass are increased?
A) It remains constant.
B) It decreases.
C) It increases.
D) It could remain constant, increase, or decrease; it depends on the mass to length ratio (mass density).
Question 4Consider two cylinders of gas identical in all respects except that one contains O2 and the other He. Both hold the same volume of gas at STP and are closed by a movable piston at one end.
Both gases are now compressed adiabatically to one-third their original volume. Which gas will show the greater pressure increase? A) the O2
B) the He
C) neither; both will show the same increase
D) impossible to tell from the information given
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