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Near Earth, the density of protons in the solar wind (a stream of particles from the Sun) is 8.70 cm-3, and their speed is 470 km/s. (a) Discover the current density of these protons. (b) If Earth's magnetic field did not deflect the protons, what total current would Earth receive?
A point charge q = 1.45 nC is placed in the center of a spherical cavity of an isolated spherical conductor of inner radius 4 cm and outter radius 12cm
A 19.00kg lead sphere is hanging from a hook by a thin wire 3.40m long, and is free to swing in a complete circle. What must be the minimum initial speed of the dart
A cable is 5.00 m long and has a diameter of 1.50 mm. The tensile modulus of the cable is 2.50 × 1010 N/m2. A force is applied to the end of the cable and the cable stretches by 3.00 mm. What is the applied force?
Sound is coming through an open window whose dimensions are 1.1 m x 0.75 m. How much sound energy comes through the window in one hour
A 2 kg box is raised from rest a distance of 3 m by a vertical force of 110 N. Find the final kinetic energy of the box
Suppose a train engineer is climbing a vertical ladder at a speed of 0.2m/s while the train is slowly coasting east at 0.70 m/s. Find out the vector of the engineer relative to the ground in rectangular notation.
A 440 N uniform rectangular sign4.00 m wide and 3.00 m high is suspended from a horizontal,6.00-m-long, uniform, 90-N rod as indicated in the figure below. The left end the rod is supported by a hinge and the right end is supported with a thin cable ..
A storage tank at STP contains 19.5 kg of nitrogen (N2). What is the volume of the tank
A proton is shot at 5.0x10^7 m/s toward a gold target. Thenucleus of a gold atom, with a mass 197 times that of the proton,repels the proton and deflects it straight back with 90% of itsinitial speed. What is the recoil speed of the goldnucleus
A car is parked at the top of a 52m -high hill. It slips out of gear and rolls down the hill. How fast will it be going at the bottom
A 1.5 m^3-volume tank holds oxygen gas (M = 32 g/mole) at the pressure of 500,000 Pa. The temperature is 27 C. Find the mass of oxygen in the tank (in kg)
You are flying to New York. You've been reading the in-flight magazine, which has an article about the physics of flying. What is the diameter of the airplane's path around the airport
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