If a person in Alaska were locked out of his house on a day when the temperature outside was ?40°C, his thick clothing would mostly reduce the loss of thermal energy by
a. conduction.
b. convection.
c. radiation.
d. all of the above.
e. convection and radiation.
a
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If the absolute magnitude, M, of a supernova is x 19 and a galaxy is found that contains a supernova with an apparent magnitude, m, of 16 . What is the distance to the galaxy? Hint: dpc = 10(m - M + 5)/5 using a scientific calculator
a. 100 AU b. 100 pc c. 100 ly d. 100 kpc e. 100 Mpc
If you set the cruise control of your car to a certain speed and take a turn, the speed of the car will remain the same. Is the car accelerating?
A) Yes B) No
The color to which human eyes are most sensitive is
A) red. B) yellow-green. C) blue. D) all the same
A uniform rod (mass = 2.0 kg, length = 0.60 m) is free to rotate about a frictionless pivot at one end. The rod is released from rest in the horizontal position. What is the magnitude of the angular acceleration of the rod at the instant it is 60° below the horizontal?
a. 15 rad/s2 b. 12 rad/s2 c. 18 rad/s2 d. 29 rad/s2 e. 23 rad/s2