Does the pressure of a gas decrease more rapidly or less rapidly when expanding adiabatically than it would when expanding isothermally?
A. More rapidly.
B. Less rapidly.
C. The pressure decreases at the same rate in both cases.
D. The pressure increases in an adiabatic expansion.
E. The pressure increases in an isothermal expansion.
A. More rapidly.
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The gravitational force between two objects can be described using the equation Fg = G M1 M2 / d2. In this equation, what does G represent?
A) the universal gravitational constant B) the density of the smaller object C) the distance between the two objects D) the gravitational mass of the larger object
Of the following gases, which is the most important contributor to the Earth's greenhouse effect?
a. water vapor b. ozone c. CFCs d. methane
If a moving object hits a still object, what happens to the momentum of the moving object?
a. The momentum of the moving object is increased by the force of the collision. b. The momentum of the moving object goes to zero at the moment of collision. c. The two stick together and move at the same speed afterward. d. The momentum of the moving object is decreased by the amount of momentum the stationary object picks up at the time of the collision. e. The momentum of the moving object matches the momentum of the stationary object.
A slide projector needs to focus the image of a 24.0-mm × 36.0-mm slide onto a square screen 1.50 m on each side. You want to fill the screen as completely as possible without any of the image falling beyond the screen
Due to space constraints in the projector, the slide must be placed 10.5 cm from the lens. (a) What magnification does the projector produce? (b) How far from the lens should the screen be placed? (c) What focal length projector lens is needed?