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What is the average pressure on the soles of the feet of a standing78.9-kg person due to the contact forcewith the floor? Each foot has a surface area of 0.022 m2.
To stop a car, first you require a certain reaction timeto begin braking. Then the car slows down at a constant rate. What is the magnitude of the deceleration
An air-filled parallel plate capacitor with a plate spacing of 1.50 cm has a capacitance of 7.20 ?F. Calculate the dielectric constant of the inserted material
Find the speed and acceleration of an electron in the first two Bohr orbits of the Li++ Ion. Also find the acceleration of an electron in the first two bohr orbital of the H atom.
A soccer player kicks a ball from ground level with an initial velocity of 25 m/s at an angle of 30° above the horizontal. What angle does the velocity vector make with the horizontal
Place a sheet of paper under a medium-sized book lying on a smooth tabletop or desktop. Which objects move the least when the paper is pulled rapidly
In the "before" part of the figure below, car A (mass 1000 kg) is stopped at a traffic light when it is rear-ended by car B (mass 1600 kg). Both cars then slide with locked wheels until the frictional force from the slick road (with a low µk of 0...
The largest moon of Pluto, Charon, was discovered in 1979. Charon is in a circular orbit of radius 19,600 km around Pluto, What is the total mass of the Pluto-Charon system
a uniform circular disk whose radius r is 50.5 cm is suspended from a point on its rim. at what radial distance r lt r
In 1996, the Solar and Heliospheric Observatory (SOHO) was "parked" in an orbit slightly inside the earth's orbit. Calculate SOHO's distance from the earth
What is the source of charge carriers moving in an electric circuit, and what is the role of the battery/source in that movement
An aluminum block slides along a horizontal surface. The block has an initial speed of 9.4 m/s and an initial temperature of 9.1degrees C. what is the final temperature of the block
A 40kg child standing on a frozen pond throws a 0.5kg stone to theeast with a speed of 5m/s. what is the recoil velocity of the child
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