Recent content by 10bunny10

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    Undergrad Does entropy decrease during the formation of stars and the freezing of water?

    Does entropy decrease when stars are created from a dust? Does etropy decrease when water freezes?
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    Calculating Drop Size, Number and Time for Water Flow Through Capillary

    Can anybody tell me if it is correct please?
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    Calculating Drop Size, Number and Time for Water Flow Through Capillary

    Here is how I imagined it.
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    Calculating Drop Size, Number and Time for Water Flow Through Capillary

    I tried something: When the drop is at the end of the tube just before to fall αl1+αl2=m0g where m0 is the mass of one drop 2απr+2απR=m0g R=m0g2απr/2απ V0=4R3π/3 m0=ρV0 m0=4ρR3π/3 N=m/m0 N=3m/4ρR3π τ=t3m/4ρR3π t=2s
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    Calculating Drop Size, Number and Time for Water Flow Through Capillary

    Homework Statement Trough a capillary with an inner radius r=1mm water flows in a form of small spherical droplets. What is the radius of the drops, the number of drops in m=10g water and the time needed the water to expire, if the surface tension of the water is =72x10^-3N/m, and the period...
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    Ball falls in a truck loaded with sand

    Homework Statement a ball falls in a truck loaded with sand with velocity v having horizontal and vertical component. The angle under which it enters the truck is α, the mass of the ball is m of the track loaded with sand is M. What happens with the momentum after the collision? The...