A ball is rolled horizontally off a table with an initial speed of 0.24 m/s. A stop watch measures the ball's trajectory time from table to the floor to be 0.20 s. How far away from the table does the ball land? (g = 9.8 m/s2 and air resistance is negligible)
a. 0.24 m
b. 0.048 m
c. 0.39 m
d. 0.15 m
e. 0.47 m
b
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Which of the following explains the rocky nature of the inner planets?
A. As the Solar nebula was spinning, the light gases were tossed to the outer parts of the disk. B. Only the rocky material could condense at the higher temperatures of the inner part of the Solar nebula. C. The Sun's gravity attracted the rocks to the inner part of the Solar System. D. The lighter elements (hydrogen and helium) were sucked in by the Sun's gravity.
Most extrasolar Neptunes and Jupiters found to date have
A) orbits very close to their parent stars, making them hot Neptunes and hot Jupiters. B) orbits that are more eccentric than those of planets in our solar system, with eccentricities greater than 0.1 C) orbits that are less eccentric than those of planets in our solar system, with eccentricities less than 0.01. D) much larger orbits than the jovian planets in our solar system.
Green light has a wavelength of 5.4 × 10?7 m. What is the frequency of this EM-wave in air?
A. 5.56 × 1014 Hz B. 6.00 × 1011 Hz C. 9.00 × 108 Hz D. 3.00 × 1010 MHz E. 1.80 × 1015 Hz
If the inductance and the capacitance both double in an LRC series circuit, the resonant frequency of that circuit will
A) decrease to one-half its original value. B) decrease to one-fourth its original value. C) decrease to one-eighth its original value. D) increase to twice its original value. E) increase to four times its original value.