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Physics, 22.06.2019 18:50
An insulated thermos contains 148 g of water at 72.7 ˚c. you put in a 11.7 g ice cube at 0.00 ˚c to form a system of ice + original water. the specific heat of liquid water is 4190 j/kg•k; and the heat of fusion of water is 333 kj/kg. what is the net entropy change of the system from then until the system reaches the final (equilibrium) temperature?
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Physics, 22.06.2019 20:40
Ablock of mass m = 2.5 kg is attached to a spring with spring constant k = 740 n/m. it is initially at rest on an inclined plane that is at an angle of theta= 26 with respect to the horizontal, and the coefficient of kinetic friction between the block and the plane is uk = 0.17. in the initial position, where the spring is compressed by a distance of d = 0.16 m, the mass is at its lowest position and the spring is compressed the maximum amount. take the initial gravitational energy of the block as zero. the block's initial mechanical energy is 9.472 j.b. if the spring pushes the block up the incline, what distance l in meters will the block travel before coming to rest? the spring remains attached to both the block and the fixed wall throughout its motion.
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Physics, 23.06.2019 15:00
If it takes ashley 3 seconds to run from the batters box to first base at an average speed of 6.5 meters per second, what is the displacement she covers in that time?
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Physics, 23.06.2019 19:50
Which birth control method can be used to prevent pregnancy after unprotected intercourse? a. female condom b. birth control patch c. emergency contraception
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