Which of the following are not inertial reference frames?
1) a desk on the floor
2) a car going around a curve
3) an airplane taking off
4) a car traveling at a constant velocity
5) a moving sidewalk
2 and 3, since acceleration is present
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Simple Harmonic Motion: The figure shows a graph of the position x as a function of time t for a system undergoing simple harmonic motion. Which one of the following graphs represents the acceleration of this system as a function of time?
A. graph a B. graph b C. graph c D. graph d
What frequency must a photon have if it is to raise an electron in a hydrogen atom from the n = 2 to the n = 4 state?
A) 3.06 × 1014 Hz B) 6.16 × 1014 Hz C) 4.11 × 1014 Hz D) 5.20 × 1014 Hz E) 9.24 × 1014 Hz
Imagine another solar system, with a star of the same mass as the Sun. Suppose there is a planet in that solar system with a mass double that of Earth orbiting at a distance of 1 AU from the star
Thinking about Newton's version of Kepler's third law, what (approximately) is the orbital period of this planet? Explain your answer.
Consider a situation where a skater pulls her arms inward, causing her rotation rate to speed up. Linear momentum is not conserved
Indicate whether the statement is true or false