A projectile is shot from the edge of a vertical cliff 60.0 m above the ocean. It has a speed of 100 m/s and is fired at an angle of 35.0° below the horizontal. How far from the foot of the vertical cliff does the projectile hit the water?
A) 79.1 m
B) 312 m
C) 684 m
D) 1084 m
E) 540 m
A
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An astronaut in a space suit is motionless in outer space. The propulsion unit strapped to her back ejects some gas with a velocity of 40.0 m/s. The astronaut recoils with a velocity of 1.00 m/s. If the mass of the astronaut and space suit after the gas is ejected is 100 kg and the mass of the gas ejected is 2.50 kg, then the total kinetic energy after the ejection of the gas is
A. 2,050 J. B. 3,430 J. C. 4,150 J. D. 5,070 J. E. 6,320 J.
Radiative energy is
A) heat energy. B) energy from nuclear power plants. C) energy carried by light. D) energy used to power home radiators. E) energy of motion.
Rank these planets in order of the strength of the greenhouse effect on the planet, from the least to the greatest
A) Mars, Mercury, Earth, Venus B) Mars, Earth, Venus, Mercury C) Mercury, Venus, Earth, Mars D) Mercury, Earth, Mars, Venus E) Mercury, Mars, Earth, Venus
If the nonzero momentum of a particle with mass is doubled, what happens to its total energy?
a. It also doubles. b. It increases, more than doubling. c. It stays the same since total energy is a constant for a given particle. d. It increases, but less than doubling.