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Consider a Van de Graaff generator with a 30.0 cm diameter dome operating in dry air.
(a) what is the maximum potential energy of the dome?
(b) What is the maximum charge on the dome?
A 25 horsepower motor consumes 21 kW of electricity, Calculate the heat loss of the motor (kW) and Calculate the efficiency of the motor
The force of gravity acting on the arm acts through point A. Identify the magnitudes of the tension force t in the deltoid muscle and the force s of the shoulder on the humerus (upper-arm bone) to hold the arm in the position shown.
Macaroni and cheese packages specify how long to cook the pasta in boiling water. Calculate the concept relating temperature and pressure in cooking of food.
If the wavelength of ultrasound in soft tissue is 0.308 mm, what is the frequency producing this wavelength
A 3m-long rigid beam with a mass 140 kg is supported at each end. An 75 student stands 2m from support 1.
Then the driver sees a red light up ahead at next intersection, and starts slowing down at the constant rate. The car stops at the red light, 180 {rm m} from where it was at t = 0.
The gravitational force exerted on a baseball is 2.23 N down. A pitcher throws the ball horizontally with velocity 14.5 m/s by uniformly accelerating it along a straight horizontal line for a time interval of 169 ms. The ball starts from rest.
A -3.07 ?C charge is placed at the center of a conducting spherical shell, Calculate the total charge on the outer surface of the conductor
The rocket attains its launch speed in a negligibly short period of time, after which its engines shut down and the rocket coasts. Explain by how much does the rocket clear the top of the wall?
A violinist places her finger so that the vibrating section of a 1.20 g/m string has a length of 40.0 cm, then she draws her bow across it. A listener nearby in a 20 ^circ {rm C} room hears a note with the wavelength of 30.0 cm. What is the tensio..
When a .22-caliber rifle is fired, the expanding gas from the burning gunpowder creates a pressure behind the bullet. determine the average pressure of the expanding gas
An 84.6-kg climber is scaling the vertical wall of a mountain. His safety rope is made of nylon that, How much is the rope stretched when it breaks his fall and momentarily brings him to rest
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