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An electron and a proton have charges of an equal magnitude but opposite sign of 1.6×10^-19 C. If the electron and proton in a hydrogen atom are separated by a distance of 5.29 × 10^-11 m, what are the magnitude and direction of the electrostatic force exerted on the electron by the proton?
A ladder 2.85 m long, weighing 228 N, initially lies flat on the ground. Compute the work done by the force lifting the ladder
At what point the electric potential zero. A sphere of mass 1.9 × 10-4 kg is suspended from a cord. A steady horizontal breeze pushes the sphere so that the cord makes a constant angle of 17° with the vertical. Find (a) the magnitude of that push a..
The connecting link is machined from 1020 steel as-rolled. Determine the maximum compressive load it could support assuming a factor of safety = 3
A satellite is in orbit about Mars. The satellite's orbital radius is 4.25×107m. The mass of the satellite is 6253 kg and the mass of Mars is6.42×1023 kg. Decide the orbital speed of the satellite.
The two stars in a binary star system have masses 2.2x10^30kg and 5.9x10^30kg. They are separated by 1.8x10^12m. What is the speed of the lightest star
q1. presume the gravitational field vector of a spherically symmetric mass distribution is a constant i.e. independent
q1. a 80-g ball collides elastically with a 350-g ball that is at rest. if the 80-g ball was travelling in the positive
A 100g ball on a 50 cm long string is swung in a vertical circle about a point 200 cm above the floor. obtain the tension in the string an instant before it broke
What does increasing the coefficient of friction do? Select all that apply. It increases the time required tostop.
If a force of 5.2 lb is applied to this piston, what is the force on the brake pad of one wheel if the area of the pad is 2 square inches?
During a portion of the Carnot cycle, a dilute gas of diatomic nitrogen is compressed slowly at constant temperature, T = 280 K. How much energy was transferred to the environment through heating or cooling
What are the energy, momentum, and wavelength of a photon that is emitted by a hydrogen atom making a direct transition from an excited state with n=9 to the ground state
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