How can the mixing of fresh and salt water be considered stored solar energy? Explain
What will be an ideal response?
The world's fresh water comes from evaporation of salt water. Solar energy is
necessary for evaporating that water from the ocean. When the salt water mixes with fresh
water, some of that solar energy is recovered (some solar energy went into gravitational
potential energy, and that was recovered as the water fell as rain.
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For the stem of the total hip replacement we discussed in Section 14.3.3, assume that the hip replacement is to go into a lightweight, frail person, and therefore the weight of the stem is critical. Use the data in Table 14.14 to determine the material with the highest relative merit for this application.
What will be an ideal response?
If Earth's rotation slowed down so that it completed exactly one rotation about its axis in 100 hours, what would be the typical time interval between sunrise and sunset? If Earth's rotation slowed down so that it completed exactly one rotation about its axis in 100 hours, what would be the typical time interval between sunrise and sunset?
a. 100 hours b. 50 hours c. 25 hours d. 24 hours
The light radiated from the Sun's surface reaches Earth in about 8 minutes, but the energy of that light was released by fusion in the solar core about
A) a hundred years ago. B) a thousand years ago. C) tens of thousands of years ago. D) hundreds of thousands of years ago. E) a million years ago.
The maximum value of the electric field in an electromagnetic wave is 2.0 V/m
What is the maximum value of the magnetic field in that wave? (c = 3.0 × 108 m/s) A) 6.7 ?T B) 6.7 pT C) 6.7 mT D) 6.7 nT E) 6.7 T