If Hubble's constant is taken to be 70 km/s/Mpc, and a quasar is found with a radial velocity of 0.95 times the speed of light, how far away is the quasar?
a. 4100 Mpc
b. 0.014 Mpc
c. 67 Mpc
d. 74 Mpc
e. 300,000 Mpc
a
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Which unit represents the most energy?
A) calorie B) Calorie C) joule D) all the same
On Earth, the magnitude of the velocity of a vertical projectile at its maximum height is equal to ______________
Fill in the blank(s) with correct word
Which of the following is true for an oscillating spring?
1.The kinetic energy is greatest when the spring is the most compressed and the most extended. 2.The potential energy is greatest when the spring is the most compressed and the most extended. 3.The total energy is greatest when the spring is the most compressed and the most extended. 4.None of these.
Most of Earth's accessible fresh water is located in
A) polar ice caps and glaciers. B) groundwater. C) rivers, lakes, and streams. D) the atmosphere.