If a galaxy is moving away from us the wavelength of the light it emits will be
A. increased.
B. blueshifted.
C. unaffected.
D. distorted.
E. decreased.
Ans: A. increased.
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The specific heat of ice is 2.10 kJ/kg src="https://sciemce.com/media/4/d5e212f71484de1632.png" class="w-image" />?
the heat of fusion for ice at 0
is 333.7 kJ/kg, the specific heat of water 4.186 kJ/kg 
and the heat of vaporization of water at 100
is 2256 kJ/kg. What is the final equilibrium temperature when 20.0 grams of ice at Error! Hyperlink reference not valid.Error! Hyperlink reference not valid.15.0
is mixed with 5.00 grams of steam at 100
A. 44.1
B. 48.9
C. 52.7
D. 58.0
E. 65.2
Opacity is
a. the balance between the pressure and force of gravity inside a star. b. the force that binds protons and neutrons together to form a nucleus. c. the force that binds an electron to the nucleus in an atom. d. a measure of the resistance to the flow of radiation (photons) through a gas. e. the temperature and density at which a gas will undergo thermonuclear fusion.
When a car, moving at velocity v, collides head on with a light volley ball, initially at rest, the ball bounces off with velocity
A) -v. B) -4v. C) -1.5v. D) -2v. E) -v/2.
What would happen if a transformer had the same number of loops on each side?
What will be an ideal response?