Physics, 01.08.2019 05:30 maelaysiap
Over a period of time, a hot object cools to the temperature of the surrounding air. this is described mathematically as newtons law of cooing t=c+(t_0-c)e^-kt, where t is the time it takes for an object to cool from the temp t_0 to the temp t, c is the surrounding air temp, and k is a positive constant tat is associated with the cooling object. a cakes removed from the oven has a temp of 207 degrees f and is left to cool in a room that has a temp of 69 degrees f. after 20 min the temp of the cake is 138 degrees f. what is the temp of the cake after 35 min?
Answers: 3
Physics, 22.06.2019 12:20
Electric field of the earth. the earth has a net electric charge that causes a field at points near its surface equal to 150 n> c and directed in toward the center of the earth. (a) what magnitude and sign of charge would a 60-kg human have to acquire to overcome his or her weight by the force exerted by the earth’s electric field? (b) what would be the force of repulsion between two people each with the charge calculated in part (a) and separated by a distance of 100 m? is use of the earth’s electric field a feasible means of flight? why or why not?
Answers: 2
Physics, 22.06.2019 23:30
Which model displays the change in a gas when the temperature of the gaseous system decreases?
Answers: 3
Over a period of time, a hot object cools to the temperature of the surrounding air. this is describ...
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