Suppose sand is leaking from an unpowered but moving railroad car. Since the sand is moving forward along with the car as it leaks out, it carries kinetic energy out of the car. This mass transfer will
A. Cause the car’s speed to increase.
B. Cause the car’s speed to decrease.
C. Have no effect on the car’s speed.
C. Have no effect on the car’s speed.
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All of the Asteroids in the Asteroid Belt together have
A. a tiny fraction of Earth's mass. B. a mass somewhere between the mass of Mars and the mass of Jupiter. C. about Earth's mass. D. about ten times Earth's mass.
A stream of electrons passes through a velocity filter where the crossed magnetic and electric fields are 0.020 T and 5.00 × 10^4 V/m, respectively. Find the kinetic energy (in electron volts) of the electrons passing through the filter. [1 eV = 1.60 × 10^-19 J]
In the two-slit experiment, the distance between the slits and the screen is 1.1 m and the distance between the slits is 0.040 mm
If the first-order bright fringe is measured to be 3.4 cm from the centerline, what is the distance between the adjacent bright fringes? A) 1.7 cm B) 5.1 cm C) 7.0 cm D) 6.8 cm E) 3.4 cm
The acceleration of a ball as it rolls down a ramp is 4 m/s2 . The ball is referred to 2 s after it starts to roll. The acceleration after starting from rest is 8 m/s2
Indicate whether the statement is true or false