The change in momentum that occurs when a 1.0 kg ball traveling at 4.0 m/s strikes a wall and bounces back at 2.0 m/s is
A) 2 kg m/s.
B) 4 kg m/s.
C) 6 kg m/s.
D) 8 kg m/s.
Answer: C
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Consider the following three items
A. 100 g of steam on the Moon B. 10 g of water on the Earth C. 20 g of ice floating in water on the Earth Put these items in order of increasing weight:
1.A < B < C 2.A < C < B 3.B < A < C 4.B < C < A 5.C < A < B 6.C < B < A 7.None of the above 8.Impossible to determineIf the stars at the turnoff point of a cluster have a mass of 3M, what is the age of the cluster?
a. 3.0×10^10 years b. 3.3×10^9 years c. 6.4×10^8 years d. 1.6×10^11 years e. The age of a star cluster cannot be determined from the mass of stars at the turnoff point.
It is possible that life exists on orphan planets, even though they do not orbit a star
Indicate whether the statement is true or false
Briefly explain why we think white-dwarf supernovae are useful for measuring cosmic distances
What will be an ideal response?