Physics, 09.07.2019 14:40 vallhernandez13
Abat moving with speed of 3.25 m/s and emitting sound of 35.0 khz approaches a moth at rest on a tree trunk. (a) what frequency is heard by the moth? (b) if the speed of the bat is increased, is the frequency heard by the moth higher or lower? (c) calculate the frequency heard by the moth when the speed of the bat is 4.25 m/s
Answers: 1
Physics, 21.06.2019 19:30
A500g object falls off a cliff and losers 100 j from its gravitational potential energy store. if the gravitational field strength g=9.8n/kg, how high is the cliff?
Answers: 1
Physics, 22.06.2019 05:00
Does work output exceed work input when a machine is used? a) yes, it does, as machines create energy. b) it depends on the type of machine used. c) no, it doesn’t, as machines are inefficient. d) no, it doesn’t, as machines cannot create energy.
Answers: 1
Physics, 22.06.2019 11:00
1. jay fills a wagon with sand (about 20 kg) and pulls it with a rope 30 m along the beach. he holds the rope 25° above the horizontal. the rope exerts a 20-n tension force on the wagon. how much work does the rope do on the wagon?
Answers: 1
Physics, 22.06.2019 18:00
Efficiency is the ratio of to for a system a)power in to power in b)power in to power out c) power out to power out d) power out to power in
Answers: 2
Abat moving with speed of 3.25 m/s and emitting sound of 35.0 khz approaches a moth at rest on a tre...
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