A mercury-in-glass thermometer reads an outside temperature of 20ºC. If the sky and surroundings of the thermometer have an average surface temperature of 5ºC, estimate the net radiation per unit area from or to the thermometer.

What will be an ideal response?


Physics & Space Science

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The Algol paradox is explained by considering

a. the degenerate nature of the hydrogen on the surface of the white dwarf. b. synchrotron radiation c. the rate of expansion of the shock wave inside the supernova. d. the rotation rate of a neutron star. e. mass transfer between the two stars in a binary system.

Physics & Space Science

Impulse: A 0.17-kg baseball is thrown with a speed of 38 m/s and it is hit straight back toward the pitcher with a speed of 62 m/s. What is the magnitude of the impulse exerted upon the ball by the bat?

Fill in the blank(s) with the appropriate word(s).

Physics & Space Science

If we were to learn that the universe is a re-collapsing universe, then we must have misinterpreted Hubble's Law because the universe must be contracting, rather than expanding as generally believed

Indicate whether the statement is true or false

Physics & Space Science

The elapsed time between two successive crossings of the same meridian by a star other than the Sun is known as

a. the tropical year. b. one sidereal day. c. the sidereal year. d. none of these.

Physics & Space Science