A hollow sphere of negligible mass and radius R is completely filled with a liquid so that its density is ?. You now enlarge the sphere so its radius is 2R and completely fill it with the same liquid. What is the density of the enlarged sphere?
A) 8 ?
B) 4 ?
C) ?/2
D) ?
E) ?/8
D
You might also like to view...
A radio telescope and an optical telescope of the same size have the same angular resolution
Indicate whether the statement is true or false
A racecar goes around a 200 m radius curve at a constant speed of 40 m/s. Its acceleration is
a. 0. b. 0.2 m/s2. c. 4 m/s2. d. 8 m/s2. e. 16 m/s2.
A uniform rod (mass = 1.5 kg) is 2.0 m long. The rod is pivoted about a horizontal, frictionless pin through one end. The rod is released from rest in a horizontal position. What is the angular speed of the rod when the rod makes an angle of 30° with the horizontal? (The rotational inertia of the rod about the pin is 2.0 kg?m2).
A. 2.2 rad/s B. 3.6 rad/s C. 2.7 rad/s D. 3.1 rad/s E. 1.8 rad/s
If light excites atomic hydrogen from its lowest energy level to the n = 12 level, what is the energy of the photons of this light?
A) 13.5 eV B) 32.2 eV C) 13.6 eV D) 0.0944 eV E) 1.13 eV