Physics for Scientists and Engineers
6th Edition
ISBN: 9781429281843
Author: Tipler
Publisher: MAC HIGHER
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Chapter 2, Problem 93P
(a)
To determine
To find:The time by spacecraft to complete one-way trip from earth to mars.
(b)
To determine
To find:The time by spacecraft to complete one-way trip from earth toProximacentauri.
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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 (in km) given that the echo time was 2.66 s and that radio waves travel at the speed of light (3.00 ✕ 108 m/s).
Sometime in the future, we will develop a space ship which can go up to half the speed of light. On a flight to the nearest star which is 4.2 light years away, we will keep the acceleration up to one g. How long will the trip take? (The trip will have three sections, the first accelerating up to maximum speed, the second at constant speed, and the third decelerating at - g to rest at the destination.)
The average person passes out at an acceleration of 7g (that is, seven times the gravitational acceleration on Earth). Suppose a car is designed to accelerate at this rate. How much time would be required for the car to accelerate from rest to 66.2 miles per hour? (The car would need rocket boosters!) Answer is in seconds!
Chapter 2 Solutions
Physics for Scientists and Engineers
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