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Refer to the temperature versus time graph (Figure 2) when answering the questions in Parts C through F. A system consists of 250 g of water. The system, originally at TA = 21.0 oC, is placed in a freezer, where energy is removed from it in the form of heat at a constant rate.
The figure shows how the temperature of the system takes t1 =10min=600s to drop to 0oC, after which the water freezes. Once the freezing is complete, the temperature of the resulting ice continues to drop, reaching temperature TB after an hour. The following specific heat and latent heat values for water may be helpful.
How much energy must be transferred out of the system as heat Q to lower its temperature to 0oC?
A piano wire with mass 3.45g and length 85.0cm is stretched with a tension of 31.0N. Calculate the average power carried by the wave
A pot of water is boiling under one atmosphere of pressure. Assume that heat enters the pot only through its bottom, What is the temperature of the heating element in contact with the pot
a lead ball of mass 18.0 kg is dropped from rest from a height of 23.0 m above the ground, Write in vector format the acceleration of the ball
The bullet passes through the block and emerges with its speed reduced to 100 m/s. The block slides a distance of 0.10 m along the surface from its initial position. Illustrate what is the coefficient of kinetic friction between block and surface?
The efficiency of a knife is 75%. If you push down on the knife with a force of 5 N to cut a piece of cake that is 6 cm thick, how much work is done on the cake
A 20.0-N block rests on a horizontal surface. The coefficients of static and kinetic friction between the surface, What is the force of friction acting on the block
A special electronic sensor is embedded in the seat of a car that takes riders around a circular loop-the-loop ride at an amusement park. Find the speed of the rider at the top of the loop
A spring with a spring constant of 42.0 N/cm has a block attached to one end and the other end is fixed. How much additional work is done by the spring if it is stretched by an additional 15.2 mm
a 4.0 kg block slides along a frictionless surface with a constant speed of 5.0 m/s as shown. What is the speed of the Block at t = 11 seconds
A certain dog whistle operates at 22.75 kHz, while another (brand X) operates at an unknown frequency. estimate the operating frequency of brand X
when it falls back it hits the ground with speed v1=50m/s. The mass of the ball is m=20g. Evaluate what is the total work done by the drag force while the ball is in the air?
suppose you were on the moon instead of on the earth. Assuming your average reaction time is the same, how far would the yardstick fall
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