A 10-g bullet moving horizontally with a speed of 1.8 km/s strikes and passes through a 5.0-kg block initially at rest on a horizontal frictionless surface. The bullet emerges from the block with a speed of 1.0 km/s. What is the kinetic energy of the block immediately after the bullet emerges?
a. 8.0 J
b. 6.4 J
c. 5.3 J
d. 9.4 J
e. 10 J
b
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You observe a distant galaxy. You find that a spectral line of hydrogen that is shifted from its normal location in the visible part of the spectrum into the infrared part of the spectrum. What can you conclude?
A) The galaxy is moving away from you. B) The galaxy is moving towards you. C) The galaxy has very weak gravity. D) The galaxy is made purely of hydrogen.
The largest satellites of Jupiter are known as the ____________ satellites
Fill in the blank(s) with correct word
The erosion process begins with
a)permafrost. b)meandering. c)landslides. d)weathering.
In size, from largest to smallest, the correct order for the Galilean moons is:
A) Callisto, Ganymede, Europa, Io. B) Ganymede, Callisto, Io, Europa. C) Io, Europa, Callisto, Ganymede. D) Europa, Ganymede, Io, Callisto. E) Ganymede, Callisto, Europa, Io.