Physics, 26.06.2019 16:00 0Brittany0
A50 kg boy jumps off the back of a 4 kg skateboard moving forward. find the skateboard’s velocity immediately after the boy jumps, assuming that the skateboard’s initial velocity is 5 m/s and the boy’s velocity when jumping off the back is 2.5 m/s in the forward direction.
Answers: 1
Physics, 22.06.2019 02:30
Power can be defined as a. the distance over which work was done. b. how much work can be done in a given time. c. all the work in an given area. d. the energy required to do work.
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Physics, 22.06.2019 21:00
What is the efficiency of an engine that does 80 j of work and exhausts 320 j of heat while taking in 400 j of heat ? a. 10% b. 20% c. 80% d. 25%
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Physics, 23.06.2019 00:20
Abeam of electrons moves at right angles to a magnetic field of 4.5 Ă— 10-2 tesla. if the electrons have a velocity of 6.5 Ă— 106 meters/second, what is the force acting on the electrons? the value of q = -1.6 Ă— 10-19 coulombs.
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Physics, 23.06.2019 01:30
The flame produced by the burner of a gas (propane) grill is a pale blue color when enough air mixes with the propane (c3h8) to burn it completely. for every gram of propane that flows through the burner, what volume of air is needed to burn it completely? assume that the temperature of the burner is 195.0°c, the pressure is 1.05 atm, and the mole fraction of o2 in air is 0.210.
Answers: 2
A50 kg boy jumps off the back of a 4 kg skateboard moving forward. find the skateboard’s velocity im...
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