Which angle is the angle of incidence for the light ray shown approaching the plane mirror?
a.
60°
b.
30°
c.
neither
d.
either
b
You might also like to view...
What is the force that keeps planets orbiting the Sun and moons orbiting planets?
a. weight b. inertia c. mass d. gravity
Sources of red, blue, and yellow light each emit light with a power of 50 mW. Which source emits the least photons per second?
a. the red source b. They all emit the same number per second. c. the blue source d. the yellow source
Conservation of Momentum: A 1200-kg ore cart is rolling at 10.8 m/s across a flat friction-free surface. A crane suddenly drops 858 kg of ore vertically into the cart. How fast does the cart move just after being loaded with the ore?
A. 6.30 m/s B. 3.80 m/s C. 4.20 m/s D. 5.70 m/s
Which star spends the longest time in the protostellar phase of life?
A) a 1-solar-mass star B) a 2-solar-mass star C) a 3-solar-mass star D) a 4-solar-mass star E) a 5-solar-mass star