Aball is tossed with enough speed straight up so that it is in the air several seconds. (a) what is the velocity of the ball when it reaches its highest point? (b) what is its velocity 1 s before it reaches its highest point? (c) what is the change in its velocity during this 1-s interval? (d) what is its velocity 1 s after it reaches its highest point? (e) what is the change in velocity during this 1-s interval? (f) what is the change in velocity during the 2-s interval? (careful! ) (g) what is the acceleration of the ball during any of these time intervals and at the moment the ball has zero velocity
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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
Answers: 1
Physics, 22.06.2019 09:00
Sobre transformações cĂclicas, sĂŁo feitas algumas afirmações, determine quais estĂŁo corretas. i – a variação de energia interna em uma transformação cĂclica Ă© nula; ii – o trabalho, em uma transformação cĂclica, Ă© sempre positivo; iii – ao completar um ciclo, o gás tem a mesma temperatura com a qual começou a transformação; iv – uma transformação cĂclica Ă©, obrigatoriamente, composta de transformações conhecidas, como adiabática, isocĂłrica, etc: a) i e iii b) i e ii c) ii e iii d) i e iv e) iii e iv
Answers: 1
Physics, 22.06.2019 16:30
When measuring volume, why is it important to use the correct tools and units to attain the greatest accuracy? use specific examples from the lab to support your answer. (5 points)
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Physics, 22.06.2019 17:50
Convection occurs when thermal energy is transferred by the movement of
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Aball is tossed with enough speed straight up so that it is in the air several seconds. (a) what is...
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