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Two bowling balls, each of mass 5kg, are located so that their centers of mass are 0.5m apart. What is the size of the force of universal gravitation attracting one to another?
In the Bohr theory of the hydrogen atom, an electron moves with constant speed in a circular orbit about a proton, where the radius of the orbit is 0.53 x 10-10 m, Determine the electrostatic force exerted by the proton on the electron
A 1.20 liter flask contains a certain quantity of ideal gas at 305 K. next an equal number of molecules of the same gas are added to the flask, after which the absolute pressure is 1.30 times its original value. What is the final temperature.
A projectile is fired straight upward at 141 m/a. how fast is it moving at the instant it reaches the top of its trajectory? Assume in its place that it was fired upward at 45. What would be its speed at the top of its trajectory.
A flat cylindrical grinding wheel is spinning at 2000 rpm (clockwise when viewed head-on) when its power is suddenly turned off. Normally, How much work was done by friction on the system
The bullet becomes embedded in the block. If the bullet-block system compresses the spring by a maximum of 88.0 cm, illustrate what was the speed of the bullet at impact with the block?
The dummy in a crash test has a head of mass 3 kg. The dummy is strapped in firmly so that the body does not move. The car's forward speed changes from 24 m/s to zero in 0.23 s.
Two waves are generated on a string of length 3.0 m to produce a three-loop standing wave with an amplitude of 4.6 cm, What are the lowest frequency
A fire hose held near the ground shoots water at a speed of 6.2 m/s.At what angle(s) should the nozzle point in order that the water would land 2.5 m away.
A 151 kg car rounds a curve of radius 163 m at 46 m/s. The acceleration of gravity is 9.8 m/s2 . What force must the road exert on its tires to hold the car on course? find out its speed when it has moved?
The string has a breaking-point force of 45 N. Illustrate what is the largest value v can have without the string breaking?
A small solid sphere, with radius 0.25 cm and mass 0.56 g rolls without slipping on the inside of a large fixed hemisphere with radius 15 cm, What is its kinetic energy at the bottom
The speed of sound in bone is 3500 m/s. How much time does it take the echo of a sound wave to travel from the back of the bone to the front of the bone if the bone is 2.50 cm thick.
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