At the solstices, the Sun's declination will be 23.5 degrees from the equator
Indicate whether the statement is true or false
TRUE
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The basic function of an electromotive force in a circuit is to do which of the following?
a. Convert electrical energy into some other form of energy. b. Convert some other form of energy into electrical energy. c. Both choices (a) and (b) are valid. d. None of the above choices are valid.
A boat that contains a heavy anchor floats in a small lake. If the anchor is thrown overboard such that it rests upon the lake bottom, which of the following will happen?
(i) The level of the water in the lake will go down slightly. (ii) The level of the water in the lake will go up slightly. (iii) The level of the water in the lake will stay exactly the same. (iv) The waterline on the boat will go up (that is, the boat will sink slightly). (v) The waterline on the boat will go down (that is, the boat will rise slightly). (vi) The water line on the boat will stay the same.
1.(i) and (v) 2.(ii) and (iv) 3.(iii) and (vi) 4.(iii) and (v)Twenty grams of a solid at 70°C is place in 100 grams of a fluid at 20°C. Thermal equilibrium is reached at 30°C. The specific heat of the solid:
a. is equal to that of the fluid. b. is less than that of the fluid. c. is more than that of the fluid. d. cannot be compared to that of a material in a different phase.
Do all comets have tails? Explain how comets form their tails
What will be an ideal response?