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A proton, which is the nucleus of a hydrogen atom, can be modeled as a sphere with a diameter of 2.4 fm and a mass of 1.67 10-27 kg. what is the density of the proton?? plese show step by step
A slingshot fires a pebble from the top of a building at a speed of 20.00 m/s. The building is 28-m tall. Ignoring air resistance, find out the speed with which pebble strikes the ground when the pebble is fired (a) horizontally (b) vertically str..
A newly discovered planet has twice mass of the earth, but the acceleration because of gravity on the new planet's surface is exactly the same as the acceleration due to gravity on the earth's surface. What is the radius Rp of the new planet in te..
A train is traveling up a 3.3 incline at a speed of 2.45 when the last car breaks free and begins to coast without friction. Explain how long does it take for the last car to come to rest momentarily?
A platform moves up and down in SHM, with amplitude 0.050 m. Resting on top of the platform is a block of wood. What is the shortest period of motion for the platform so that the block will remain in constant contact with it?
A 600g model rocket is on a cart that is rolling to the right at a speed of 3.0m/s. At what horizontal distance left of the loop should you launch
You are asked to design a parallel-plate capacitor having a capacitance of 1 F and a plate separation of 1.00 mm. compute the required surface area of each plate. Is this a realistic size for a capacitor.
The beam emerging from a ruby laser (wavelength 694.3 nm) passes through a circular aperture 4.7 mm in diameter. If the spread of the beam is limited only by diffraction, what is the angular speed of the beam
If a chain of 35 identical short springs linked end-to-end has a stiffness of 400 N/m, what is the stiffness of one short spring
An insect 1.3mm tall is placed 1.0mm beyond the focal point of the objective lens of a compound microscope. Where is the image formed by the objective lens
An astronaut travels at a speed of 0.93c from the Earth to a distant star that is 4.5e+17 m away. how old is she when she arrives at the star
The electron and proton of a hydrogen atom are separated (on the average) by a distance of approximately 5.3 x 10-11 m, what is a fundamental difference between the two forces
A 15 kg lawn mower is pushed with a constant force of 30.0 N at an angle of 37.0 degrees. What is the acceleration of the lawn mower
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