Sea breezes that occur near the shore are attributed to a difference between land and water with respect to what property?
a. mass density
b. coefficient of volume expansion
c. specific heat
d. emissivity
c
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As a 1.0-kg object moves from point A to point B, it is acted upon by a single conservative force which does -40 J of work during this motion. At point A the speed of the particle is 6.0 m/s and the potential energy associated with the force is +50 J. What is the potential energy at point B?
a. +72 J b. +10 J c. +90 J d. +28 J e. +68 J
Siddhartha saved up money from his summer job to buy a powerful home theater system. When shopping for the best buy in a home theater system the sales representative informs Siddhartha that the more expensive models are worth the money because they ____.
A) amplify sound up to 160 dB B) boost frequencies below 80 Hz C) buffer sounds that reach 60 dB D) filter out frequencies below 10000 Hz
In the formula E = mc2, what does E represent?
A) the kinetic energy of a moving object B) the radiative energy carried by light C) the gravitational potential energy of an object held above the ground D) the mass-energy, or potential energy stored in an object's mass E) the electric charge of the object
The wearing away of soil and rock and the subsequent downslope movement of the fragments are called
a. erosion. b. weathering. c. cross-cutting. d. deposition.