How many seconds in 5.24 days?
A)
3.77 × 103 s
B)
4.98 × 107 s
C)
4.53 × 105 s
D)
2.26 × 105 s
E)
7.55 × 103 s
C
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Refer to the sketch above of an H-R diagram for a star cluster. What is the age of the cluster?
A) Less than 1 billion years B) About 1 billion years C) About 2 billion years D) About 10 billion years E) More than 15 billion years
If two protons and two neutrons are removed from the nucleus of an oxygen atom, a nucleus of which element remains?
A) nitrogen-12 B) carbon-12 C) neon-18 D) carbon-14
A proton's rest mass is 1.67 × 10^?27 kg. Calculate its kinetic energy when it is accelerated to a speed of 0.80c
a. 1.0 × 10^?10 J b. 1.5 × 10^?10 J c. ?2.0 × 10^?10 J d. 2.5 × 10^?10 J e. 7.5 × 10^?10 J
When light travels from air into water,
A) its velocity, wavelength and frequency all change. B) its velocity changes, but its frequency and wavelength do not change. C) its frequency changes, but its velocity and wavelength do not change. D) its velocity and wavelength change, but its frequency does not change. E) its wavelength changes, but its velocity and frequency do not change.