Solar farms such as the Meinels' are not realistic visions of the energy future
What will be an ideal response?
There is no reason (except for the raising of capital for construction, and these
ideas would require a large amount of capital).
The capital would be paid back over an appropriate period of years, leaving behind the
installation. The initial difficulty of finding the capital would not inhibit investment if the
business plan is clear enough to show that the principal and interest will be repaid.
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What do we mean by the orbital energy of an orbiting object (such as a planet, moon, or satellite)?
A) Orbital energy is the sum of the object's kinetic energy and its gravitational potential energy as it moves through its orbit. B) Orbital energy is the object's kinetic energy as it moves through its orbit. C) Orbital energy is a measure of the object's speed as it moves through its orbit. D) Orbital energy is the amount of energy required for the object to leave orbit and escape into space.
A 6.00-m length of rope has a mass of 700 g. It is pulled taught with a force of 100 N. What is the speed of waves on the rope?
A) 29.3 m/s B) 11.7 m/s C) 42.0 m/s D) 3.42 m/s E) 4.20 m/s
Light of wavelength 6.9 × 10^?7 m has an energy of: (h = 6.63 × 10^?34 J?s, c = 3.00 × 10^8 m/s)
a. 2.9E–19 J b. 9.6E–20 J c. 3.1E–19 J d. 4.3E–20 J e. 3.2E–20 J
A long solenoid has a radius of 2.0 cm and has 700 turns/m. If the current in the solenoid is decreasing at the rate of 8.0 A/s, what is the magnitude of the induced electric field at a point 2.5 cm from the axis of the solenoid?
a. 56 mV/m b. 8.8 mV/m c. 88 mV/m d. 69 mV/m e. 44 mV/m