If the drag force on a car is F at a moderate highway speed v, at what speed would the drag force be doubled?
a. 1.2v
c. 1.7v
b. 1.4v
d. 2.0v
B
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According to the Solar Nebula theory, planets:
A) should be randomly oriented to their star's equator. B) will revolve opposite the star's rotation. C) should be a common result of star formation. D) should be extremely rare. E) should orbit perpendicular to their star's equator.
Using the observations of the Solar and Heliospheric Observatory (SOHO) and Solar Dynamics Observatory (SDO), it may be possible to predict mass ejections from the Sun days in advance
Indicate whether the statement is true or false
What is the surface temperature of a distant star (which emits light as if it were a blackbody) where the peak wavelength is 456 nm? (Hint: The surface of the human body at 35° C has a peak wavelength of 9.41 mm). (1 nm = 10-9 m = 10-3 mm)
a. 5100 K c. 6040 K b. 4510 K d. 6360 K
What makes a transition from a lower energy state to a higher energy state when a photon is absorbed into an atom?
A) proton B) neutron C) electron D) photon E) graviton