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1. A battery with an internal resistance of 0.50 ohms has a current of 0.78A through it when it is connected in a circuit whose external resistance is 1.50 ohms. In this circuit, what is the potential difference between the terminals of the battery?
2. Power is being transmitted through normal transmission lines from a generator to a substation. If the input voltage is doubled and the current halved, how will the power input and the useful power output change?
two point charges are located close to each other. one charge has a magnitude of 9.5 microc and is located at the
When a dielectric material is introduced between the plates of a parallel-plate capacitor and completely fills the space, Determine the dielectric constant of the material that was introduced
A passenger train is travelling at 31 m/s when the engineer sees a freight train 351 m ahead of his train travelling in the same direction on the same track. The freight train is moving at a speed of 5.6 m/s.
An 8 g bullet is fired into a 2.5 kg ballistic pendulum and becomes embedded in it. If the pendulum raises a vertical distance of 6cm, compute the initial speed of the bullet.
Objects with masses of 220 kg and a 520 kg are separated by 0.390 m. Find the net gravitational force exerted by these objects on a 54.0 kg object placed midway between them
A crate of eggs is located in the middle of the flatbed of a pickuptruck as the truck negotiates an unbanked curve in the road. Thecurve may be regarded as an arc of a circle of radius 50 m. If thecoefficient of static friction between the crate and ..
The weight of passengers on a roller coaster increases by 53% as the car goes through a dip with a 35m radius of curvature
A square conductor of edge length .4m carries a clockwise currentof 10A. What are the magnitude and direction of the magneticfield at the center of the square? If this conductor wascircular in nature and carried the same current, what magneticfiel..
An electromagnetic wave travelling the +z direction has a maximum magnetic field of 10^-7 T in the negative y direction at z = 0 and t = 0. The magnetic field falls to zero in 3 x 10^-16 seconds.
Calculate the electric field(magnitude and direction) at the center of a square 52.5 on a side if one corner is occupied by a - 38.8 charge
A parachutist with a camera descends in free fall at a speed of 11 m/s. The parachutist releases the camera at an altitude of 140 meter. Find the velocity of the camera just before it hits ground
A farsighted woman breaks her current eyeglasses and is usingan old pair whose refractive power is 1.720 diopters. How far is hernear point from her eyes
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