Physics, 18.09.2019 05:10, lordcaos066
Atoy rocket moving vertically upward passes by a 2.0-m-high window whose sill is 8.0 m above the ground. the rocket takes 0.15 s to travel the 2.0 m height of the window. what was the launch speed of the rocket, and how high will it go? assume the propellant is burned very quickly at blastoff.
Answers: 2
Physics, 22.06.2019 13:30, kuddlebugsmommy
The two stars in a certain binary star system move in circular orbits. the first star, alpha, has an orbital speed of 36 km/s. the second star, beta, has an orbital speed of 12 km/s. the orbital period is 137 d. a) what is the mass of the star alpha? b) what is the mass of the star beta?
Answers: 1
Physics, 22.06.2019 20:00, dee6991
Abumper car with a mass of 250 kg is traveling at a speed of 4 m/s. this bumper car collides and sticks to a second bumper car with a mass of 250 kg, which is initially at rest. what is the final speed of these two bumper cars after the collision, assuming they remain stuck together?
Answers: 1
Atoy rocket moving vertically upward passes by a 2.0-m-high window whose sill is 8.0 m above the gro...
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