Physics, 02.07.2019 01:20 woodfordmaliky
Conversations with astronauts on the lunar surface were characterized by a kind of echo in which the earthbound person’s voice was so loud in the astronaut’s space helmet that it was picked up by the astronaut’s microphone and transmitted back to earth. it is reasonable to assume that the echo time equals the time necessary for the radio wave to travel from the earth to the moon and back (that is, neglecting any time delays in the electronic equipment). calculate the distance from earth to the moon given that the echo time was 2.56 s and that radio waves travel at the speed of light (3.00×108 m/s). give your answer in thousands of km.
Answers: 1
Physics, 22.06.2019 10:00
Amira pulls a 3 pound wagon 4 feet. how much work has she done?
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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 11:00
A0.580-kg rock is tied to the end of a string and is swung in a circle with a radius of 0.500 meters. the velocity of the rock is 4.50 m/s. what is the centripetal force acting on the rock? 15.5 n 5.22 n 69.8 n 23.5 n
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Physics, 22.06.2019 19:30
Juliette sets the initial velocity to +10 m/s, the acceleration to zero, and clicks “start.” how can shakina describe the subsequent motion of the car juliette controls?
Answers: 3
Conversations with astronauts on the lunar surface were characterized by a kind of echo in which the...
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