What principle is responsible for light spreading as it passes through a narrow slit?
A)
reflection
B)
refraction
C)
polarization
D)
diffraction
E)
interference
D
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Energy and Mass: A 1.00-kg gold ingot is carried from the bottom of the Eiffel tower to the top, 300 m above ground level. By what amount does its mass change? (c = 3.00 × 108 m/s)
A. Its mass does not change. B. Its mass increases by 3.27 × 10-14 kg C. Its mass decreases by 3.27 × 10-14 kg D. Its mass increases by 1.64 × 10-14 kg E. Its mass decreases by 1.64 × 10-14 kg
Evaporation of water from a tea kettle takes place
1) at the surface of the water, 2) at the bottom of the water, 3) throughout the water, whereas boiling takes place 4) at the surface of the water. 5) at the bottom of the water. 6) throughout the water.
A charge Q accumulates on the hollow metallic dome, of radius R, of a Van de Graaff generator. A probe measures the electric field strength at various points outside the sphere surface. By what factor will the electric field value at the 2R distance be changed if the charge value were increased to (5/3)Q?
a. (5/3)2 b. 5/3 c. 3/5 d. (3/5)2 e. 5
Few smartphones have built-in digital cameras that can take quality photos.
Answer the following statement true (T) or false (F)