When we measure the mass of a planet using the Doppler shift method, we know that it is mass
A) could well be smaller
B) could be larger or smaller
C) is exactly as measured
D) could well be larger
D
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Two identical cylinders at the same pressure contain the same kind of gas and the same number of moles of gas (in other words, the same amount of gas). If one has two times the volume of the other, what can you say about the relative temperatures of the gas within each of the cylinders?
1.The temperature must be the same. 2.The cylinder with the larger volume must have a temperature on an absolute scale that is ½ the temperature of the other. 3.The cylinder with the smaller volume must have a temperature on an absolute scale that is ½ the temperature of the other. 4.It is impossible to tell because the temperatures could be anything.
A player hits a tennis ball into the air with an initial velocity of 32 m/s at 35° from the vertical. How fast is the ball moving at the highest point in its trajectory if effects of air are negligible?
What will be an ideal response?
A proton is located at the point (x = 1.0 nm, y = 0.0 nm) and an electron is located at the point Find the magnitude of the electrostatic force that each one exerts on the other. (k = 1/4??0 = 9.0 × 109 N ? m2/C2, e = 1.6 × 10-19 C)
A) 1.4 × 10-11 N B) 5.3 × 10-18 N C) 5.3 × 108 N D) 5.9 × 10-15 N
What would be different if this figure were drawn accurately to scale?
A) The dots that represent individual asteroids would have to be much smaller. B) The dots that represent individual asteroids would overlap each other. C) The dots should be farther from the Sun.