Question

A boxcar of length 8.1 m and height 2.4 m is at rest on frictionless rails. Inside the boxcar (whose mass when empty is 3700 kg) a tank containing 1400 kg of water is located at the left end. The tank is 1.0 m long and 2.4 m tall. At some point the walls of the tank start to leak, and the water fills the floor of the boxcar uniformly. Assume that all the water stays in the boxcar.

After all the water has leaked out what will be the final velocity of the boxcar? (Take movement to the right as positive. Assume that the mass of the boxcar is evenly distributed.)

Tries 0/8

What is the displacement of the boxcar 4 $s$ after the water has settled in the bottom. (Take positive displacement as being to the right.)

Tries 0/8

Answer #1

A boxcar of length 8.7m and height 2.4m is at rest on
frictionless rails. Inside the boxcar (whose mass when empty is
2900 kg) a tank containing 2200 kg of water is located at the left
end. The tank is 1.1 m long and 2.4 m tall. At some point the walls
of the tank start to leak, and the water fills the floor of the
boxcar uniformly. Assume that all the water stays in the boxcar.
After all the...

7. [1pt]
A boxcar of length 8.00 m and height
2.40 m is at rest on frictionless rails. The empty boxcar has a
mass of 2800 kg. Inside the boxcar, located at the
left end, is a tank containing 2550 kg of water. The tank is 1.90 m
long and 2.40 m tall. The tank starts to leak, and the water fills
the floor of the boxcar uniformly. Assume that all the water stays
in the box car. After all...

What is the change in length of a metal rod with an original
length of 4 m, a coefficient of thermal expansion of 0.00002/ ° C,
and a temperature change of 30° C?
1.
2.4 mm
2.
12 mm
3.
1.2 mm
4.
24 mm
Determine the number of electrons passing through a point in the
wire in 8 minutes when the current is 10 A.
a.
3 * 1016 electrons
b.
none of these
c.
4,800 electrons
d.
1.6...

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