Physics, 20.10.2021 01:50 tanviknawale
Please help!!!
1. In a closed system, two moving bodies collide. There are no external forces acting on the system. How does the total momentum of the system before the collision
mpare with the total momentum of the system after the collision?
A) The total momentum after the collision is zero, while the total momentum before the collision is nonzero.
B) The total momentum after the collision is more than the total momentum before the collision.
C) The total momentum after the collision is less than the total momentum before the collision.
D) The total momentum after the collision is the same as the total momentum before the collision.
2. As part of an experiment on momentum, a billiard ball with a mass of 0.180 kg travels 1.5m in 0.5s. What is the momentum of the ball?
A) 0.06 kg x m/s
B) 0.54 kg x m/s
C) 0.14 kg x m/s
D) 0.81 kg x m/s
Answers: 1
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Global warming will produce rising sea levels partly due to melting ice caps but also due to the expansion of water as average ocean temperatures rise. to get some idea of the size of this effect, calculate the change in length of a column of water 1.00 km high for a temperature increase of 1.00Âșc. note that this calculation is only approximate because ocean warming is not uniform with depth. (answer in Ă10^{-3} â3 m)
Answers: 1
Physics, 22.06.2019 17:40
Emmy kicks a soccer ball up at an angle of 45° over a level field. she watches the ball's trajectory and notices that it lands, two seconds after being kicked, about 20 m away to the north. assume that air resistance is negligible, and plot the horizontal and vertical components of the ball's velocity as a function of time. consider only the time that the ball is in the air, after being kicked but before landing. take "north" and "up" as the positive â and âdirections, respectively, and use â10 m/s2 for the downward acceleration due to gravity.
Answers: 2
Physics, 22.06.2019 18:00
Efficiency is the ratio of to for a system a)power in to power in b)power in to power out c) power out to power out d) power out to power in
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Please help!!!
1. In a closed system, two moving bodies collide. There are no external forces acti...
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