The coldest region of the atmosphere is the

a. stratosphere.
b. troposphere.
c. mesosphere.
d. thermosphere.


c

Physics & Space Science

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Of the following systems, which contains the most heat?

a. 100 kg of water at 80°C b. 250 kg of water at 40°C c. 600 kg of ice at 0°C d. Systems do not contain heat.

Physics & Space Science

If a reaction involving hadrons were written at the quark level as , what is the quark composition of the unknown last particle?

A. udd
B.
C. uds
D.
E. More information is needed.

Physics & Space Science

When you drop a rubber ball on the floor it bounces back. The force exerted on the ball to produce bouncing is by the

A) ball. B) floor. C) need more information

Physics & Space Science

A bar magnet passes through a circular loop of wire as shown below. At the instant that the middle of the magnet passes through the loop, the induced current ( as seen from the coil # 2) is

A. ccw and increasing.
B. cw and decreasing.
C. cw and increasing.
D. zero.

Physics & Space Science