Granulation is caused by convection currents just below the photosphere
a. True
b. False
Indicate whether the statement is true or false
True
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Radiation pressure: If the average intensity of the sunlight in Miami, Florida, is 1040 W/m2, what is the average value of the radiation pressure due to this sunlight on a black totally absorbing asphalt surface in Miami? (c = 3.00 × 108 m/s)
A. 2.28 × 10-6 N/m2 B. 1.63 × 10-6 N/m2 C. 7.83 × 10-6 N D. 3.47 × 10-6 N/m2 E. 9.78 × 10-6 N/m2
Elementary Particles: The proton is made up of which one of the following quark combinations (up, down, strange, charm, top, bottom)?
A. uud B. ddu C. udd D. ttb E. bst
When a wheel is rolling without slipping, the magnitude of its velocity relative to the ground is greatest at
a. the point in contact with the ground. b. the point at the center of the wheel. c. the point at the top of the wheel opposite to the point in contact with the ground. d. the point farthest forward from the center of mass of the wheel. e. the point farthest behind the center of mass of the wheel.
A ball is thrown horizontally from the top of a building 0.10 km high. The ball strikes the ground at a point 65 m horizontally away from and below the point of release. What is the speed of the ball just before it strikes the ground?
a. 43 m/s b. 47 m/s c. 39 m/s d. 36 m/s e. 14 m/s