Newton's first law of motion is essentially a restatement of Galileo's law of inertia
a. True
b. False
Indicate whether the statement is true or false
True
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____ of the Milky Way contains mostly old (population II) stars and globular clusters
a. The disk component b. The spherical halo component c. The hydrogen gas in the disk d. The spiral arms e. Sgr A
In space, a 4.0 kg metal ball moving 30. m/s has a head-on collision with a stationary second ball of equal mass. After the elastic collision, what are the velocities of the balls?
What will be an ideal response?
During the investigation of a traffic accident, police find skid marks 90 m long. They determine the coefficient of friction between the car's tires and the roadway to be 0.50 for the prevailing conditions
Estimate the speed of the car when the brakes were applied.
Evidence for the big bang comes from
A) observations of the pulsations of distant neutron stars. B) observation of the cluster of stars near the center of the Milky Way galaxy. C) the observation that the galaxies are all receding from each other. D) All of the above. E) None of the above.