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A wave has an angular frequency of 190 rad/s and a wavelength of 2.6 m. Calculate (a) the angular wave number and (b) the speed of the wave.
A neutron at rest decays in to a proton and an electron. how much kinetic energy (in MeV) are shared by the electron and proton? can a proton decay into a neutron and a positron?
The sun's rays are focused, using a lens as a "burning glass." All the visible sunlight entering a lens of radius 2.97 cm is concentrated in a circular spot of radius 1.05 mm. Find the intensity of visible light in the spot if the intensity of visibl..
q. a 2.1-kg block is released from rest and allowed to slide down a frictionless surface and into a spring. the far end
q1. 16.8-kg sled is being pulled across a horizontal surface at a constant velocity. the pulling force has a magnitude
In a severe storm, 1.05 cm of rain falls on a flat horizontal roof in 31.0 min. obtain the average force exerted on the roof by the rain
A mass m1 = 8.99 kg at rest on a horizontal frictionless surfaceand connected to a wall by a spring with k = 70.0N / m collides with a second mass m2 = 5.00 kg, What is the maximum compression of the spring
The hot-reservoir temperature of a Carnot engine with 26.0 % efficiency is 70.0 ?C higher than the cold-reservoir temperature. What is the cold reservoir temp
An electric motor turns a flywheel through a drive belt that joins a pulley on the motor and a pulley that is rigidly attached to the flywheel, Find the tension in the lower (slack) segment of the belt
An object is projected horizontally at 8.0m/s from the top of a 122.5 m cliff. How far from the base of the cliff will the object strike the ground
The orbit of the moon takes 27.321661 days (you should convert to seconds!) at a radius of 384,748 km, Calcualte the orbital speed of the moon
A microphone is located on the line connecting two speakers that are 0.766 m apart and oscillating 180° out of phase. What is the next lowest frequency that produces an interference maximum at the microphone's location
You have a mass of 87 kg and are on a 50-degree slope hanging on to a cord with a breaking strength of 221 newtons. Illustrate what must be the coefficient of static friction to 2 decimal places between you and the surface for you to be saved fro..
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