A balloon is buoyed up with a force equal to the
a. density of the surrounding air
b. atmospheric pressure
c. weight of the balloon and its contents
d. weight of the air it displaces
d
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What is the resolving power of the telescope?
A) the ability to make distant objects appear closer B) the ability to collect a lot of light C) the ability to detect very faint objects D) the ability to distinguish adjacent objects in the sky E) the ability to separate light into its component colors
The spectral lines are more distinct when viewed in a mercury vapor lamp under
A) high pressure. B) low pressure. C) same for each
A linear charge of nonuniform density ? = bx, where b = 2.1 nC/m2, is distributed along the x axis from x = 2.0 m to x = 3.0 m. Determine the electric potential (relative to zero at infinity) of the point y = 4.0 m on the y axis
a. 36 V b. 95 V c. 10 V d. 17 V e. 15 V
Wire A has a diameter half that of B but is otherwise identical. The electric field acting in each has the same magnitude. How do the currents flowing through these two wires compare?
F. Other (specify)
T. It is impossible to say given the provided information