Protoplanets of the Jovian planets could have grown very hot from
a. heat from the Sun.
b. radioactivity of light elements such as hydrogen and helium.
c. the infall of material at high velocity.
d. tidal forces due to the Sun.
e. collisions with large planetesimals.
c
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An ionized gas is called a plasma
Indicate whether the statement is true or false
What is the radius of curvature of the path of a 3.0-keV proton in a perpendicular magnetic field of magnitude 0.80 T?
A. 9.9 mm B. 1.1 cm C. 1.3 cm D. 1.4 cm E. 7.6 mm
Water flows out of a large reservoir through a pipe that opens to the atmosphere 5.70 m below the level of the water in the reservoir. What is the speed of the water as it comes out of the pipe?
A) 1.72 m/s B) 7.47 m/s C) 55.8 m/s D) 10.6 m/s E) 27.9 m/s
Two parallel rays (also parallel to the optic axis) reflect from a concave mirror. They intersect at
A) the center of curvature. B) the focal point. C) a point behind the mirror. D) infinity.