A 3.0-kg object moving in the positive x direction has a one-dimensional elastic collision with a 5.0-kg object initially at rest. After the collision the 5.0-kg object has a velocity of 6.0 m/s in the positive x direction. What was the initial speed of the 3.0 kg object?
a. 6.0 m/s
b. 7.0 m/s
c. 4.5 m/s
d. 8.0 m/s
e. 5.5 m/s
D
You might also like to view...
A certain ideal gas has a temperature 300 K and a pressure 5.0 × 104 Pa. The molecules have a mean free path of 4.0 × 10?7 m. If the temperature is raised to 350 K and the pressure is reduced to 1.0 × 104 Pa the mean free path is then:
A. 6.9 × 10?8 m B. 9.3 × 10?8 m C. 3.3 × 10?7 m D. 1.7 × 10?6 m E. 2.3 × 10?6 m
•An object from which light cannot escape is called a
• •(a) a black hole •(b) a neutron star •(c) a white dwarf •(d) a type I supernova
Orbital electrons do not spiral into the atomic nucleus because of
1) electrical forces, 2) the wave nature of the electrons, 3) angular momentum, 4) the discreteness of energy levels, 5) quantum mechanical laws, and the electrons have discrete radii from the nucleus because 6) the circumference of each orbit is an integral multiple of the electron wavelength. 7) electrical forces act over discrete distances. 8) energy levels themselves are discrete.
Vision Problems: Farsightedness can usually be corrected with
A. converging lenses. B. diverging lenses. C. convex mirrors. D. cylindrical lenses. E. concave mirrors.