The resistance of most metals generally decreases with temperature

Indicate whether the statement is true or false


FALSE

Physics & Space Science

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Assuming the conditions ripe for life and intelligence abound in the Galaxy, what factor limits the number of galactic civilizations currently in existence?

A) the average survival time of the civilizations B) the lack of metals for technology C) the speed of technological development D) the expansion of the universe E) the number of supernova explosions

Physics & Space Science

According to quantum field theory, electrons

A) are the quanta of a matter field. B) are the quanta of the electromagnetic field. C) interact by exchanging quarks. D) always come in pairs. E) None of the above.

Physics & Space Science

A car moving at 36 m/s passes a stationary police car whose siren has a frequency of 500 hz. What is the change in the frequency (in Hz) heard by an observer in the moving car as he passes the police car? (The speed of sound in air is 343 m/s.)

a. 416 b. 208 c. 105 d. 52 e. 552

Physics & Space Science

One hundred milliliters of water is poured into a U-tube that has a cross-sectional area of 1 cm2 . Then 100 milliliters of oil, with a density 80% that of water, is poured down one side of the U-tube so that the oil floats on the water. Find the difference in height of the liquid surfaces on the two sides of the U-tube

Physics & Space Science