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The body temperature of an 80 kilogram person is 40oC. Find at what rate in watts must the person transfer thermal energy to reduce the body temperature to 37oC in 30 minute, assuming the body continues to produce energy at the rate of 150 W?
The magnetic field has been measured to be horizontal everywhere along a rectangular path x = 22 cm long and y = 5 cm high. Along the bottom the average magnetic field B1 = 1.3 10-4 tesla, along the sides an average magnetic field B2 = 1.0 10-4 te..
three balls of equal mass are fired from the same position at a height h above horizontal ground with equal speeds. the
Calculate the force required to pull a copper ball of radius 3.00 cm upward through a fluid at the constant speed 6.00 cm/s
Using your value for n, find the speed of light inside the lucite rectangle. what will be the wavelength of the light inside the material
A 35 kg child slides down a playground slide from a height 2.0 m above the bottom of the slide. The speed of the child at the bottom is 2.8 m.s^-1. If the length of the slide is 3.2. what is the frictional force between the child and the slide.
A loaded ore van has a mass of 920 kilogram and rolls on rails with negligible friction. Compute what maximum power must the winch motor provide
An astronaut on the moon applies a100N horizontal force to a 10kg mass at rest on a table. At what rate does the mass accelerate
A heat engine absorbs 21000 J from a hot reservoir at 257 degrees C and expels 15000 J to a cold reservoir at 37 degrees C in each cycle. Find the theoretical efficiency and the actual efficiency
A boy ties a small stone to one end of a string and holding the other end, he whirls the stone above his head in a horizontal circle. If the stone has a mass of 0.5 kg, find the centripetal force on the stone
Starting from rest at t = 0 s, a wheel undergoes a constant angular acceleration. When t = 1.7 s, the angular velocity of the wheel is 6.2 rad/s. The acceleration continues until t = 16 s, when the acceleration suddenly changes to 0rad/s2. During wha..
There are two weights hanging from a pulley, one on the ground (3.00 kilogram) and one hanging (5.00 kilogram). Determine the speed of the other pulley when the 5 kilogram pulley hits the ground
an air-filled parallel-plate capacitor has a capacitance of 1.1 pf. the separation of the plates is doubled and wax is
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