A mass of 0.40 kg, hanging from a spring with a spring constant of 160 N/m, is set into an up-and-down simple harmonic motion. What is the speed of the mass when moving through the equilibrium point? The starting displacement from equilibrium is 0.10 m
a. zero
c. 2.0 m/s
b. 1.4 m/s
d. 3.4 m/s
C
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The most massive planet in our solar system is
A) Saturn. B) Uranus. C) Mars. D) Jupiter. E) Neptune.
The inhabitants of a planet in another galaxy have their eyes at the exact center of their 4.0-m long bodies. How long must a plane mirror be for such a creature to be able to see all of its body in the mirror?
a. 1.0 m b. 2.0 m c. 2.5 m d. 4.0 m e. 8.0 m
The critical angle for an air-glass interface is 29.6°. When a light ray in air is incident on the interface, the reflected ray is 100% polarized
What is the angle of refraction of that ray? A) 26.3° B) 25.7° C) 23.9° D) 24.5° E) 25.1°
Conduction electrons move to the right in a certain wire. This indicates that:
A) the current density points left but the direction of the electric field is unknown B) the current density and electric field both point right C) the current density and electric field both point left D) the current density points right and the electric field points left E) the current density points left and the electric field points right