Physics, 14.12.2019 06:31 coleman310
Aphysicist makes a cup of instant coffee and notices that, as the coffee cools, its level drops 3.00 mm in the glass cup. show that this decrease cannot be due to thermal contraction by calculating the decrease in level if the 350cm3 of coffee is in a 7.00-cm-diameter cup and decreases in temperature from 95.0°c to 45.0°c . (most of the drop in level is actually due to escaping bubbles of air.)
Answers: 3
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If an athlete runs once around a track, back to the starting line, her average velocity is zero. true or false?
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Physics, 22.06.2019 21:00
During a car accident, a 125kg driver is moving at 31m/s and in 1.5s is brought to rest by an inflating air bag. what is the magnitude of the change in momentum to the driver
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Physics, 22.06.2019 21:20
16. a brave but inadequate rugby player is being pushed backward by an opposing player who is exerting a force of 800 n on him. the mass of the losing player plus equipment is 90.0 kg, and he is accelerating at 1.20m/s2 size 12{1 "." "20"" m/s" rsup { size 8{2} } } {} backward. (a) what is the force of friction between the losing player’s feet and the grass? (b) what force does the winning player exert on the ground to move forward if his mass plus equipment is 110 kg? (c) draw a sketch of the situation showing the system of interest used to solve each part. for this situation, draw a free-body diagram and write the net force equation.
Answers: 2
Aphysicist makes a cup of instant coffee and notices that, as the coffee cools, its level drops 3.00...
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