A(n) _______________ occurs when the Moon moves between Earth and the Sun
Fill in the blank(s) with correct word
solar eclipse
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The H-R diagram of a young star cluster shows
a. that high mass stars have not yet reached the main sequence yet. b. that low mass stars have not yet reached the main sequence yet. c. mainly giant stars. d. no stars since none have reached the main sequence yet.
How much heat is required to raise the temperature of 2 moles of an ideal monatomic gas by 10 C° at constant volume?
A) 249 J B) 416 J C) 208 J D) 200 J E) 125 J
Show that the temperature distribution in a sphere of radius ro, made of a homogeneous material in which energy is released at a uniform rate per unit volume Gq, is
GIVEN
- A homogeneous sphere with energy generation
- Radius = ro
FIND
- Show that the temperature distribution is as shown above.
ASSUMPTIONS
- Steady state conditions persist
- The thermal conductivity of the sphere material is constant
- Conduction occurs in the radial direction only
SKETCH
A ball is thrown from the edge of a 20.0 m high cliff with a speed of 20.0 m/s at an angle of 30.0° below horizontal. What is the speed of the ball when it hits the ground below the cliff?
A) 37.6 m/s B) 28.1 m/s C) 31.4 m/s D) 43.2 m/s E) 29.8 m/s