Physics, 12.02.2020 22:26 Baby010391
Railroad car A, with mass 6275 kg, is traveling east at 6.5 m/s along a straight track. It strikes railroad car B, with mass 5155 kg, which is also traveling east along the same track at 3.8 m/s. The two railroad cars stick together. Assume the track is frictionless.
How Fast do the two attached railroad cars move immediately after the collision?
Answers: 1
Physics, 22.06.2019 18:30
Ablock of mass m slides on a horizontal frictionless table with an initial speed v0 . it then compresses a spring of force constant k and is brought to rest. the acceleration of gravity is 9.8 m/s2. how much is the spring compressed x from its natural length? 1) x = v0*sqrt(k/(mg)) 2) x=v0*sqrt(m/k) 3) x=v0*((mk)/g) 4) x=v0*sqrt(k/m) 5) x=v0*(m/kg) 6) x=v0*sqrt((mg)/k) 7) x=(v0)^2/(2g) 8) x=v0*(k/(mg)) 9) x=(v0)^2/(2m) 10) x=v0*((mg)/k)
Answers: 3
Physics, 23.06.2019 00:30
Which of the following conditions lead you to see an absorption line spectrum from a cloud of gas in interstellar space? the cloud is extremely hot. the cloud is visible primarily because it reflects light from nearby stars. the cloud is cool and lies between you and a hot star. the cloud is cool and very dense, so that you cannot see any objects that lie behind it.
Answers: 3
Physics, 23.06.2019 14:30
When an orange rolls off a table, its potential energy is converted into?
Answers: 1
Physics, 23.06.2019 17:20
Pearl labels a diagram of a charged capacitor as shown. which change would correct the error in the diagram? changing +2q to +q changing +2q to –2q reversing the direction of the arrows reversing the labels for conductors and insulator
Answers: 2
Railroad car A, with mass 6275 kg, is traveling east at 6.5 m/s along a straight track. It strikes r...
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