A 4.00 kg object is moving at 5.00 m/s EAST. It strikes a 5.00 kg that is moving WEST at 2.00 m/s. The objects have a one-dimensional elastic collision in the EAST-WEST direction. The velocity of the 5.00 kg object after the collision is
A. 4.22 m/s EAST.
B. 2.78 m/s WEST.
C. 4.22 m/s WEST.
D. 2.78 m/s EAST.
E. 1.11 m/s WEST.
A. 4.22 m/s EAST.
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A supermassive black hole that is erupting____
a. will consume all gas and dust in the galaxy b. will heat the gas in the cluster until it all escapes c. is fed by the intergalactic gas of the cluster d. may push its accretion disk away and choke off the eruption e. will push other galaxies away from its parent galaxy
I observe a galaxy that is 100 million light-years away: what do I see?
A) the light from the galaxy as it is today, but it is blueshifted B) the light from the galaxy as it is today, but it is redshifted C) the light from the galaxy as it was 100 million years ago and it it blueshifted D) the light from the galaxy as it was 100 million years ago and it is redshifted E) Nothing: the galaxy lies beyond the cosmological horizon.
Two very long parallel wires carry currents in the positive x direction. One wire (current = 15 A) is coincident with the x axis. The other wire (current = 50 A) passes through the point (0, 4.0 mm, 0). What is the magnitude of the magnetic field at the point (0, 0, 3.0 mm)?
a. 3.8 mT b. 2.7 mT c. 2.9 mT d. 3.0 mT e. 0.6 mT
The wavelength of a wave divided by the frequency of the wave is the wave's speed
Indicate whether the statement is true or false