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A rotating door is made from four rectangular sections. The mass of all section is 85kg. A person pushes on the outer edge of one section by a force of F = 68N that is directed perpendicular to the section. All section measures 1.2m from the axis for rotation. Decide the magnitude of the door's angular acceleration.
A satellite has a mass of 5825 kg and is in a circular orbit 4.34 × 105 m above the surface of a planet. What would be the true weight of the satellite if it were at rest on the planet's surface
four charges q=4nC form a square, 20 cm on a side. what is the potential of electric field at the center of the square
An object known to be made of copper (p=8.89 g/cm^3) and aluminum (p=2.7 g/cm^3) "weighs" 25 g in air but only 20 g in water. How much copper is in the object
A tether ball of mass 0.40 kg is attached to a vertical pole by a cord 1.5 m long. Assume the cord attaches to the center of the ball. The cord makes an angle of 20° with the vertical. (a) What is the tension in the cord? . N (b) What is the speed of..
A 550 N physics student stands on a bathroom scale in an elevator. As the elevator starts moving, the scale reads 450N. (a) Find the acceleration of the elevator. Find the mass of the worker.
During an adiabatic process, the temperature of 6.00 moles of a monatomic ideal gas drops from 565°C to 227°C. Find the change in internal energy
Coherent sources A and B emit electromagnetic waves with wavelength 2.00 \rm cm. What is the phase difference at P between these two waves
Consider a system of 12 particles with two energy levels. Plot the number of microstates corresponding to each value of the total energy if (a) the particles are indistinguishable and (b) if the particles are distinguishable.
In making raspberry jelly, 887 g of raspberry juice is combined with 930 g of sugar. The mixture starts at room temperature, 23.0°C, and is slowly heated on a stove until it reaches 220°F, How much energy does the mixture absorb
How far does the car go before it stops. A car traveling at 50m/s runs out of gas while traveling up a 30 degree slope. how long will it travel before it rolls back down.
An RLC circuit consists of a 218 resistor, a 45 ?F capacitor, and a 298 mH inductor, What is the phase angle between the current and the applied voltage
A 4.0kg mess kit sliding on a frictionless surfaceexplodes into two 2.0gk parts, one moving at 3.0m/s, What is the orginal speed of the mess kit
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