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(a) Find the current in a 9.00 ? resistor connected to a battery that has an internal resistance of 0.30 ? if the voltage across the battery (the terminal voltage) is 15.00 V.
(b) What is the emf of the battery?
When the crate is moving, the frictional force between the floor and the crate has a magnitude of 122.0 N. If the crate starts from rest, explain how fast will it be moving after the man has pulled it a distance of 2.30 m?
A proton is moving in an uniform electric field of part (a). At point A, the velocity of the proton is 1.90 X 104 m/s, east. What is the speed of proton at point B.
The threshold of dark-adapted (scotopic) vision is 6 multiplied by 10-11 W/m2 at a central wavelength of 550 nm. If light with this intensity and wavelength enters the eye when the pupil is open to its maximum diameter of 7.5mm, how many photons p..
A sphere of radius 6.21 cm and uniform surface charge density, Find the separation between the point charge and the center of the sphere
A woman stands on a scale in a moving elevator. Her mass is 60.9 kg, and the combined mass of the elevator and scale is an additional 819 kg. Starting from rest, the elevator accelerates upward. Through the acceleration, the hoisting cable applies a ..
The only force acting on a 2.7 kg canister that is moving in an xy plane has a magnitude of 2.7 N. The canister initially has a velocity of 3.0 m/s in the positive x direction, and some time later has a velocity of 7.4 m/s in the positive y direct..
A charge of q = +7.50 µC is located in an electric field. The x and y components of the electric field are Ex = 4.80 103 N/C and Ey = 7.40 103 N/C, respectively. (a) What is the magnitude of the force on the charge? (b) Determine the angle that th..
I just got this wrong for the third time. A u-tube manometer is used to measure the pressure of a vessel under vacuum. Assume the manometer is open to atmospheric pressure.
how much time in seconds will it take the officer. A 63 resistor is connected in parallel with a 115.0 resistor. This parallel group is connected in series with a 19 resistor. The total combination is connected across a 15.0 V battery. Find the cur..
How much work did the movers do (horizontally) pushing a 190-{rm kg} crate 11.2 m across a rough floor without acceleration, if effective coefficient of friction was 0.60.
If the car is now at rest and the pendulum undergoes S.H.M. would its time be shorter of longer than that calculated in (b) explain your answer.
The coefficient of kinetic friction is 0.50. A horizontal force of magnitude 87 N begins to pull directly on the block. In unit-vector notation, what are the resulting accelerations of (a) block and (b) slab.
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