Aburning piece of coal glows red on a lab table. a student wants to prevent the coal from transferring heat to him. he sets up a metal shield between himself and the coal to prevent convection. why will this not completely stop all of the heat transfer? the metal shield will heat up, and then heat the air on the student's side of the shield. the metal shield will cause more radiation to reach the student. the metal shield will not prevent heat transfer by conduction. the metal shield cannot block the flow of fluids.
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John throws .4 kg ball with velocity of 18 m/s. hits .2 kg bottle and bottle flies 25 m/s. how fast is ball traveling after hitting the bottle?
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Which statement correctly describes a step-up transformer? a. it increases the amount of electric energy available. b. it increases the voltage of an electric current. c. it changes direct current into alternating current. d. it has more loops of wire in its primary coil.
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Blank liquids and gases exert a buoyant force on objects placed in them
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