Aperson wishes to accelerate an object upward uniformly. which one of the following choices must be true of the force, f, provided by the person onto the object? w represents the magnitude of the gravitational force acting on the object. ignore any effects of the air or of the earth’s rotation.(a) f = w (b) f ≥ w (c) f > w (d) f ≥ 2w (e) f > 2w
Answers: 2
Physics, 21.06.2019 23:30, southerntouch103
A175 g lump of molten lead at its melting point (327 c) is placed into 55.0 g of water at 20.0 c. the specific heat of lead is 130.j/kg c and the hf of lead is 20,400 j/kg. when the lead and the water have reached equilibrium, what is the temperature of the mixture?
Answers: 3
Physics, 22.06.2019 06:30, kdfawesome5582
Apebble is thrown into a calm lake, ripples are formed from the center and move outward. the water particles in the lake travel in a circular pattern that moves up and down on the surface of a lake, and the energy travels a) diagonally. b) downward. c) horizontally. d) upward.
Answers: 2
Physics, 22.06.2019 23:30, elizabethhubbe
Which statement correctly describes the interaction between magnetic poles? north and south poles attract each other. north and south poles repel each other. two north poles will attract each other. two south poles will attract each other.
Answers: 1
Physics, 23.06.2019 01:30, alsafy383
Lacie kicks a football from ground level at a velocity of 13.9 m/s and at an angle of 25.0° to the ground. how long will the ball be in the air before it lands? round your answer to the nearest tenth. s how far will the football travel before it lands? round your answer to the nearest tenth. m
Answers: 3
Aperson wishes to accelerate an object upward uniformly. which one of the following choices must be...
Mathematics, 06.10.2019 06:30
Health, 06.10.2019 06:30
Biology, 06.10.2019 06:30