What is responsible for much of the erosion of Earth's surface?
a. lava flows
b. solar wind
c. impact craters
d. convection
e. water
e
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A Styrofoam ice chest is 2 cm thick. If the inside of the chest is at 0ºC and outside the chest it is 25ºC, estimate the heat transfer by conduction through the Styrofoam per unit area.
What will be an ideal response?
The energy output of a typical nuclear reactor is via
A) heating water to form steam. B) directing steam to a turbine. C) spinning a turbine to generate electricity. D) all of the above E) none of the above
An x vs. t graph is drawn for a ball moving in one direction. The graph starts at the origin and at t = 5 s the velocity of the ball is zero. We can be positive that at t = 5 s,
a. the slope of the curve is non-zero. b. the ball has stopped. c. the acceleration is constant. d. the curve is at x = 0, t = 0.
A single slit forms a diffraction pattern, with the first minimum at an angle of 40.0° from central maximum, when monochromatic light of 630-nm wavelength is used
The same slit, illuminated by a new monochromatic light source, produces a diffraction pattern with the second minimum at a 60.0° angle from the central maximum. What is the wavelength of this new light? A) 425 nm B) 475 nm C) 450 nm D) 500 nm E) 525 nm