Physics, 28.01.2020 01:31 preservations
A10 cm3 block of paraffin (a type of wax) weighs 0. 085 n. it is carefully submerged in a container of gasoline. one cm3 of gasoline weighs 0.0069 n.
a. what is the weight of the gasoline displaced by the paraffin?
b. will the block of paraffin sink or float in the gasoline?
Answers: 2
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Ahot-air balloon takes off from the ground traveling vertically with a constant upward acceleration of magnitude g/4. after time interval δt, a crew member releases a ballast sandbag from the basket attached to the balloon. how many seconds does it take the sandbag to reach the ground? (express your answer in terms of δt)
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A47.2 g block of copper whose temperature is 480 k is placed in an insulating box with a 91.8 g block of lead whose temperature is 200 k. (a) what is the equilibrium temperature of the two-block system? (b) what is the change in the internal energy of the two-block system between the initial state and the equilibrium state? (c) what is the change in the entropy of the two-block system? the heat capacities of copper and lead are 386 j/kg·k and 128 j/kg·k, respectively.
Answers: 1
A10 cm3 block of paraffin (a type of wax) weighs 0. 085 n. it is carefully submerged in a container...
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