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Potentiometer used for the determination of internal resistance of a 1.5 V cell. The balance point of the cell in open circuit is 76.3 cm. When a resistor of 9.5 Ω is used in the external circuit of the cell, the balance point shifts to 64.8 cm length of the potentiometer wire. Determine the internal resistance of the cell.
A 2.5-m^3 cylinder of oxygen (O2) is kept in a machine shop. The oxygen in the tank is kept at a temperature of 80 °C and a pressure of 0.6 MPa. what is the new pressure in the tank
A 475turn circular-loop coil17.0cm in diameter is initially aligned so that its axis is parallel to Earth's magnetic field. find the value of Earth's magnetic field at that location
using a 699-nm wavelength laser you form the diffraction pattern of a 0.111-mm wide slit on a screen. you measure on
The magnitude of the electric field due to a small dipole is measured to be 250 N/C at a location on the axis of the dipole, 2 cm from the center of the dipole. Approximately what is the magnitude of the electric field due to the dipole at a location..
You need to design a photodetector that can respond to the entire range of visible light. What is the maximum possible work function of the cathode
a heat engine operating at maximum efficiency has an efficiency of 25%. The temperature of the cold reservoir is 300 K. what is the temperature of the hot reservior
A 5.6 box is on a frictionless 44 slope and is connected via a massless string over a massless,What is the tension in the string once the box begins to move
A 55 kg person riding a bike puts all her weight on each pedal when climbing a hill. The pedals rotate in a circle of radius 17 cm. (a) What is the maximum torque she exerts? (b) How could she exert more torque?
A bicycle is moving at a speed v = 4.26 m/s. If the radius of the front wheel is 0.450 m, how long does it take for that wheel to make a complete revolution.
A human eyeball is about 2.0 cm long, and the pupil has amaximum diameter of about 8.0 mm. What is the "speed" of this lens
A 3.4cm diameter parallel-plate capacitor has a 2.5mm spacing. The electric field strength inside the capacitor is 1.5×10^5 V/m, how much is the charge on each plate
A) Assuming that the Styrofoam absorbs a negligibly small amount of heat and that no heat was lost to the surroundings, what is the specific heat of the metal? B) Which is more useful for storing heat, this metal or an equal weight of water? defin..
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