A device that measures absolute air pressure is called a
a. manometer.
b. barometer.
c. thermometer.
d. tire gauge.
e. none of the above
b
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Two particles, X and Y, are 4 m apart. X has a charge of 2Q and Y has a charge of Q. The force of X on Y:
A) has twice the magnitude of the force of Y on X B) has half the magnitude of the force of Y on X C) has four times the magnitude of the force of Y on X D) has one-fourth the magnitude of the force of Y on X E) has the same magnitude as the force of Y on X
As you know, the earth has an orbital period of 1.0 year at an orbital radius of 1.0 AU (astronomical unit, the average distance between the earth and the sun)
If a new "minor planet" were to be found in a circular orbit with radius 13 AU, what would be its orbital period?
A package is dropped from a helicopter moving upward at If it takes before the package strikes the ground, how high above the ground was the package when it was released if air resistance is negligible?
A) 810 m B) 1000 m C) 1200 m D) 1500 m
Studies of solar vibrations have revealed that
A) the Sun vibrates only on the surface. B) neutrinos from the solar core reach the solar surface easily. C) the Sun generates energy by nuclear fusion. D) they are caused by processes similar to those that create earthquakes. E) our mathematical models of the solar interior are fairly accurate.