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1-As a crude model for lightning, consider the ground to be one plate of a parallel-plate capacitor and the cloud to be the other plate. The altitude of the cloud is 6000 m and its area is 6.5 km2.
a) How much charge can the cloud hold before the dielectric strength of air is exceeded and the lightning results?
b) What is the capacitance of the system?
A football player runs the pattern by the three displacement vectors, , and . The magnitudes of these vectors are A = 4.00 m, B = 18.0 m, and C = 16.0 m. Using the component method, find out the (1) magnitude and (2) direction of the resultant vec..
A 2.47 kg steel ball strikes a massive wall at 11.7 m/s at an angle of alpha = 67.2° with the plane of the wall. It bounces off with the same speed and angle. If the ball is in contact with the wall for 0.218 s, what is the magnitude of average force..
The mass per unit length of the cord is 1.24 e-2 kg/m, so the mass of the cord is negligible compared to the mass of block. The cord is being vibrated at a frequency of 167 Hz (vibration source not shown in the drawing).
Sam's speed at the bottom is 35.0. Illustrate what is the coefficient of kinetic friction of his skis on snow?
A gas expands from I to F. The energy added to the gas by heat is 418 J when the gas goes from I to F along the diagonal path. (a) What is the change in internal energy of gas? (b) How much energy must be added to the gas by heat for indirect path..
A long, narrow rectangular loop of wire is moving toward the bottom of page with a speed of 0.025 m/s. The loop is leaving a region in which a 2.1 T magnetic field exists; magnetic field outside this region is zero. All through the time of 1.0 s, wha..
A small metallic bob is suspended from the ceiling by a thread of negligible mass. The ball is after that set in motion in a horizontal circle so that thread describes a cone. Compute the magnitude of the angular momentum of the bob about a vertic..
He was supposed to travel due north for 5.6km, but he actuallytraveled 7.8km at 50 degrees north due east. (a) how far and (b) elucidate in what direction must he now travel to reach base camp?
A person pulls a toboggan for a distance of 40m along the snow with a rope directed 25 degrees above the snow. The tension in the rope is 83N.
The average frictional force exerted on him by the pole has a magnitude of 815 N, and his speed at the bottom of the pole is 3.7 m/s. Explain how far did he slide down the pole?
A spacecraft is traveling with a velocity of v0x = 5675 m/salong the +x direction. Two engines are turned on for a time of 847 s. One engine gives the spacecraft an acceleration in the +x direction of ax = 1.25 m/s2,while the other gives it an acc..
A dog chasing a ball starts at rest and accelerates uniformly over a distance of 5 meters. It takes the dog 1 s to cover that first 5 m. What is the dog's acceleration, and what speed is the dog traveling when it reaches the 5 m point?
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