The ____ of an object is a measure of the amount of matter it contains. On the other hand, ____ is a measure of the gravitational force on an object
a. weight, mass
b. mass, weight
c. energy, force
d. force, energy
e. momentum, energy
B
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Which will warm up quicker in sunlight?
A) a piece of colored glass B) a piece of clear glass C) both the same
If the sum total mass of reactants in a nuclear reaction is greater than that of product particles, then which of the following statements best describes the conditions of the reaction?
a. reaction is exothermic b. reaction is endothermic c. atomic number of each reactant must be greater than 40 d. atomic number of each reactant must be less than 80
Why is the era of nucleosynthesis so important in determining the chemical composition of the universe forever after?
What will be an ideal response?
Camera Exposure: A lens of focal length 45 mm is mounted on a 35-mm camera. The lens aperture is set at f/2.0 and the shutter speed set at 1/2000 s. The photographer wants to keep the same exposure (amount of light), but wants to change the f-number to f/8.0 for greater depth of field. What should be the new shutter speed to maintain the same exposure?
A. 1/1000 s B. 1/500 s C. 1/4000 s D. 1/8000 s E. 1/125 s