Speed of the ball just before it strikes the ground
A ball is thrown horizontally from the top of a building 110 m high. The ball strikes the ground 54 m horizontally from the point of release. What is the speed of the ball just before it strikes the ground?
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A potential difference of 75 mV exists between the inner and outer surfaces of a cell's membrane. The inner surface is negative relative to the outer surface. How much work is required to eject a positive sodium ion (Na+) from the interior of the
A negative charge of -2.0 10-4 C and a positive charge of 9.0 10-4 C are separated by 0.26 m. What is the force between the two charges?
What does Kluckhohn mean by the phrase "culturally standardized unreason?" Can you think of any examples of this sort of unreason from your own culture?
Light of wavelength 0.538 µm (in air) enters the water in a swimming pool. The speed of light in water is 0.750 times the speed in air. What is the wavelength of the light in water?
A proton with speed v = 3.00 x 105 m/s orbits just outside a charged sphere of radius r = 1.00 cm. What is the charge on the sphere?
Algol consists of a 3.7 MSun main-sequence star and a 0.8 MSun subgiant. Why does this seem surprising, at least at first?
Mercury, the planet closest to the sun, has an orbital radius of 5.8 × 107 km. Find the angular displacement of Mercury as it travels through an arc length equal to the radius of Earth's orbit around the sun (1.5 × 108 km).
It has been estimated that the Earth contains 109 metric tons of natural uranium that can be mined economically. What is the energy release possible from the 235U in 109 metric tons of natural uranium?
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