Physics, 26.08.2019 16:00, sdfghyuji123
1. someone fires a 0.04 kg bullet at a block of wood that has a mass of 0.5 kg. (the block of wood is sitting on a frictionless surface, so it moves freely when the bullet hits it). the wood block is initially at rest. the bullet is traveling 300 m/s when it hits the wood block and sticks inside it. now the bullet and the wood block move together as one object. how fast are they traveling?
2. two kids are roller skating. amy, with a mass of 55 kg, is traveling forward at 3 m/s. jenny, who has a mass of 40 kg, is traveling in the opposite direction at 5 m/s. they crash into each other and hold onto each other so that they move as one mass. how fast are they traveling?
3. jake is bowling with a 8 kg bowling ball. he rolls the ball at 7 m/s, and it hits one stationary pin with a mass of 2 kg. the pin goes flying forward at 12 m/s. how fast is the bowling ball now traveling?
4. john has to hit a bottle with a ball to win a prize. he throws a 0.4 kg ball with a velocity of 18 m/s. it hits a 0.2 kg bottle, and the bottle flies forward at 25 m/s. how fast is the ball traveling after hitting the bottle?
Answers: 2
Physics, 22.06.2019 00:30, kittykat8317
There are weak or strong attractive forces between atoms of liquids with a high viscosity
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Physics, 22.06.2019 14:40, sherlinejules1
You throw a small rock straight up from the edge of a highway bridge that crosses a river. the rock passes you on its way down, 7.00 s after it was thrown. what is the speed of the rock just before it reaches the water 28.0 m below the point where the rock left your hand? ignore air resistance.
Answers: 2
Physics, 22.06.2019 17:30, herbal420medici
Ethanol has a heat of vaporization of 38.56 kj/mol and a normal boiling point of 78.4 c. what is the vapor pressure of ethanol at 14 c?
Answers: 3
1. someone fires a 0.04 kg bullet at a block of wood that has a mass of 0.5 kg. (the block of wood i...
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