What is a shock wave?
a. A wave caused by an earthquake.
b. Any loud sound moving through the air.
c. The edge of the pressure cone caused by superimposed waves from an object moving faster than sound.
d. The point of the pressure cone caused by superimposed waves.
e. The distance from the crest to the trough of a set of waves.
c
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Velocity: A motorist makes a trip of 180 miles. For the first 90 miles she drives at a constant speed of 30 mph. At what constant speed must she drive the remaining distance if her average speed for the total trip is to be 40 mph?
A. 45 mph B. 50 mph C. 52.5 mph D. 55 mph E. 60 mph
A charged particle (mass = M, charge = Q > 0) moves in a region of space where the magnetic field has a constant magnitude of B and a downward direction. What is the magnetic force on the particle at an instant when it is moving horizontally toward the north with speed V?
a. QVB toward the east b. Zero c. QVB toward the west d. QVB upward e. QVB toward the south
Because the Hubble constant has a value of 70 km/s/Mpc, a galaxy 50 Mpc away would have a recession velocity of _______________ km/s. (Round your answer to the nearest 1 km/s)
Fill in the blank(s) with correct word
Why doesn't the Hubble Space Telescope need adaptive optics?
What will be an ideal response?