When an object is dropped from a tower, what is the effect of the air resistance as it falls?
a. does positive work
b. increases the object's kinetic energy
c. increases the object's potential energy
d. None of the above choices are valid.
d
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Which of the following statements about degeneracy pressure is not true?
A) Degeneracy pressure can continue to support an object against gravitational collapse even if the object becomes extremely cold. B) Degeneracy pressure arises from a quantum mechanical effect that we don't notice in our daily lives. C) Black holes form when gravity overcomes neutron degeneracy pressure. D) Degeneracy pressure can arise only from interactions among electrons.
What element are white dwarfs made of? Why?
What will be an ideal response?
An object is placed 15.0 cm to the left of a double-convex lens of focal length 20.0 cm. The image of this object is located
A) 60.0 cm to the right of the lens. B) 60.0 cm to the left of the lens. C) 8.57 cm to the right of the lens. D) 8.57 cm to the left of the lens. E) 30.0 cm to the left of the lens.
Exclusion Principle: If ? = 4, which one of the following is a possible quantum number for n?
A. 0 B. 2 C. 3 D. 4 E. 8