The first law of thermodynamics is based
upon
a) the law of conservation of energy.
b) the law of conservation of inertia.
c) the law of conservation of molecular velocity.
d) the ideal gas laws.
•
a
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A greater gravitational field causes time to
A) speed up. B) slow down. C) fluctuate. D) Gravity has no measurable effect on time.
Identify the locations of Earth's water, both oceanic and fresh
What will be an ideal response?
Why are collisions between galaxies more likely than collisions between stars within a galaxy?
A) Galaxies have higher redshifts than stars. B) Galaxies travel through space much faster than stars. C) Galaxies are much larger than stars. D) Relative to their sizes, galaxies are closer together than stars.
Three coplanar parallel straight wires carry equal currents I as shown below. The current in the outer wires is directed to the right, and that in the middle wire is directed to the left. Each pair of wires is a distance a apart. The direction of the magnetic force on the middle wire
a.
is up out of the plane of the wires.
b.
is down into the plane of the wires.
c.
is in the plane of the wires, directed upwards.
d.
is in the plane of the wires, directed downwards
e.
cannot be defined, because there is no magnetic force on the middle wire.