Alex throws a 0.25-kg rubber ball down onto the floor. The ball's speed just before impact is 4.5 m/s, and just after is 2.9 m/s. What is the change in the magnitude of the ball's momentum?
a. 0.39 kg/m/s
b. 1.9 kg/m/s
c. 1.1 kg/m/s
d. 0.73 kg/m/s
e. 7.4 kg/m/s
b
You might also like to view...
Consider a black body emitting 0.2 W/m^2 of thermal radiation between zero and 0.01 ?m wavelengths and 1.2 W/m^2 above 0.01 ?m. What is the total radiation emitted per unit area? What is emitted at exactly 0.01 ?m?
What will be an ideal response?
The Schwarzchild radius of a black hole is that radial distance from the center of a sphere within which not even light can escape. It was first discovered mathematically by Schwarzchild in 1916 after Einstein published his general relativity theory
It can be calculated from a star's mass M as: R = 2GM/c2. If the mass of star G is twice as much as the mass of star H, the average density of star G compared to star H will be A) twice as much. B) half as much. C) four times as much. D) one-fourth as much. E) eight times as much.
Answer the following statement(s) true (T) or false (F)
The earth’s equilibrium temperature depends on its radius
A beam splitter in a Michelson interferometer is
A) an extremely sharp knife edge. B) two transparent pipes. C) a half-silvered mirror. D) made of two mirrors. E) made of three mirrors.