A bridge that was 10.4 m long has been washed out by the rain several days ago. How fast must a car be going to successfully jump the stream, if we neglect air resistance? Although the road is level on both sides of the bridge, the road on the far side is 3.00 m lower than the road on this side
a. 18.8 m/s
b. 13.3 m/s
c. 10.9 m/s
d. 26.6 m/s
e. 14.3 m/s
b
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This image shows the velocity of gas moving toward or away from us on the Sun's surface, as measured through Doppler shifts; the key indicates the measured velocity, with negative velocities indicating gas moving toward us and positive velocities away from us. Based on this map, about how fast is the sun rotating at its equator? (Hint: determine the speed at which equatorial gas is moving toward us on one side of the equator and away from us on the other.)
A) about 200 m/s B) about 2000 m/s C) about 20,000 m/s D) The Sun is not rotating.
A photon scatters off of a stationary electron. Which of the following statements about the photon are true? (There could be more than one correct choice.)
A) Its wavelength increases due to the scattering. B) Its frequency increases due to the scattering. C) Its wavelength decreases due to the scattering. D) Its frequency decreases due to the scattering. E) Its energy does not change.
You stand near the earth's equator. A positively charged particle that starts moving parallel to the surface of the earth in a straight line directed east is initially deflected upwards. If you know there are no electric fields in the vicinity, a possible reason why the particle does not initially acquire a downward component of velocity is because near the equator the magnetic field lines of the earth are directed
A. upward. B. downward. C. from south to north. D. from north to south. E. from east to west.
Glass is transparent to wave frequencies that
A) match its natural frequencies. B) are below its natural frequencies. C) both of these D) neither of these