A 0.38-kg block rests on a level surface and is attached to a horizontally aligned spring with a spring constant of 55.0 N/m. The block is initially displaced 4.8 cm from the equilibrium point and then released to set up a simple harmonic motion. A frictional force of 0.50 N exists between the block and surface. What is the speed of the block when it passes through the equilibrium point after
being released from the 4.8-cm displacement point?
a. 0.21 m/s
b. 0.32 m/s
c. 0.64 m/s
d. 0.46 m/s
e. 1.8 m/s
d
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The Himalayan Mountains are rugged, jagged peaks and the Appalachians are smooth and rolling. Why is there a difference?
a. The Himalayas are much older and the rocks have begun breaking off. b. The Himalayas are volcanic mountains and the Appalachians are not. c. The Appalachians are much older and have been smoothed by erosion. d. The Appalachians are younger and just started to be thrust upward by plate tectonics. e. a and d
A person's eye lens is 2.7 cm away from the retina. This lens has a near point of 25 cm and a far point at infinity
(a) What must the focal length of this lens be in order for an object placed at the near point of the eye to focus on the retina? (b) What must the focal length of this lens be in order for an object placed at the far point of the eye to focus on the retina?
In an AC series circuit the capacitive reactance is 253 W and frequency is 100 Hz. What is the capacitance?
a. 6.29 mF c. 50.0 mF b. 8.0 mF d. 3.2 mF
A lens that is thinner at the center than the edges
a. is a converging lens b. is a diverging lens c. always forms a real image d. always forms a virtual image e. none of the above