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A polar explorer pulls a sled on dry snow (the coefficient of kinetic friction is 0.12 for sled on snow). The rope attached to the sled pulls at an angle of 9° above the horizontal and the explorer pulls with with 600 N of force. The sled has a total mass 71 kg. While the explorer pulls the sled for a horizontal distance of 41 m (before he needs to take a break),
a) What is the mechanical work done by the explorer (i.e. the rope) on the sled?
A block (mass = 1.8 kg) is hanging from a massless cord that is wrapped around a pulley (moment of inertia = 1.2 x 10-3 kg·m2), find the angular acceleration of the pulley
The North Star (Polaris) is a distance 431 ly away and radiates energy in the form of light at a rate of 8.6 x 1029 W. What is the intensity of this light at the Earth
An electron of mass 9.1E-31 kg is released from rest at a distance of 7.1 E-10 m from a fixed electron. Find the maximum velocity (in meters/second) of the moving electron after release
A charged object has a potential of 40 V at a distance of 3 m. If the distance is increased to 42 m, then what will be the new potential
question1at what distance from a proton is the magnitude of its electric field 2.3times105? what is magnitude of the
A heat engine runs in the cycle A to B to C and back to A. The pressure at C is 200 kPa. The volume at C is 20 liters.
Three deer, A, B, and C, are grazing in a field. Deer B is located 62.8 m from deer A at an angle of 51.7 ° north of west. What is the distance between deer A and C
A common capacitor found in the lab is in the form of a cylinder of length 2.5 cm. Suppose it is an air filled cylindrical capacitor with radii 1.4 cm and 1.5 cm. What is the value of the capacitance
Suppose 199 W of heat flows by conduction from the blood capillaries beneath the skin to the body's surface area of 1.37 m2. estimate the average distance of capillaries below the skin surface
The primary coil of a transformer has N1 = 250 turns, and its secondary coil has N2 = 1500 turns. what rms voltage is developed across the secondary coil
Richard is driving home to visit his parents. 140 mi of the trip are on the interstate highway where the speed limit is 65 mph. How many minutes does he save
He-Ne lasers are often used in physics demonstrations. They produce light of wavelength 633nm, What is the average energy density in the laser beam
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