Physics, 28.07.2019 10:00 billy12008
Afriend shouts to you from the other side of a canyon. if the sound does not reach you until 4 seconds after your friend begins to shout, and the canyon is 1372 meters across, what is the speed of the sound? a) 45 m/s b) 343 m/s c) 423 m/s d) 1372 m/s
Answers: 1
Physics, 21.06.2019 23:10
A248-g piece of copper is dropped into 390 ml of water at 22.6 °c. the final temperature of the water was measured as 39.9 °c. calculate the initial temperature of the piece of copper. assume that all heat transfer occurs between the copper and the water. remember, the density of water is 1.0 g/m
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Clothes dryer uses about 7 amps of current from a 240 volt line. how much power does it use?
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Which of the following are guidelines to follow for obtaining accurate observations
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Physics, 23.06.2019 08:30
Amoving freight car collides with an identical one that is at rest. if momentum is conserved, what happens to the second car after the collision? it attains the same speed as the first car. it moves at half the speed of the first car. it moves at twice the speed of the first car.
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Afriend shouts to you from the other side of a canyon. if the sound does not reach you until 4 secon...
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