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The gravitational force between two electrons 1.00 m apart is5.42x10-71 N. Find the mass of an electron.
a 11.00 kg block starts from rest at the top of a 25.0 meter long 30.0 degree incline. Its kinetic energy at the bottom of the incline is 1347.5 J
A potter's wheel-a thick stone disk of radius 0.500 m and mass 125 kg-is freely rotating at 50.0 rev/min. Find the effective coefficient of kinetic friction between the wheel and rag
The energy of sunlight hitting the earth is about 1400 W/m^2 (where 1 W= 1 J/s) in mid day. Given that the sun is about 150 million km from the earth, estimate the total output of the sun
The speed of an alpha particle is determined to be 8.75×106 m/s. If all of its kinetic energy is acquired by passing through an electric potential, what is the magnitude of that potential
189.35 J of energy are transferred to a system in the form of heat while the internal energy decreases by 46.99 J
A certain speed boat weighs 5,880 N. It can accelerate from 0 to 40 m/s in 5 seconds. (Need to see the math). How large is the net force acting on the boat
The sound intensity in front of a loudspeaker diaphragm vibrating at 2kHz is 4.3 W/m^2, with an acoustic power output of 0.3W. Calculate the diameter of the diaphragm. in cm
Two identical guitar strings are stretched with the same tension between supports that are not the same distance apart. The fundamental frequency of the higher-pitched string is 500Hz, and the speed of transverse waves in both wires is 125 m/s. How m..
A balloon is filled with 5.00 liters of helium at a pressure of 1.20 atm and a temperature of 27.0 degrees C. Find the mass of the helium
The input of a variable auto transformer is connected to an alternating is connected to an alternating emf of 120 V rms. the output is connected to a resistor of 100?. the output voltage varies linearly from 0 at theta = full CCW position to 120 V..
A molecule of DNA (deoxyribonucleic acid) is 2.28 µm long. Determine the effective spring constant of the molecule
what are the formulas for these questions1. if stiffness of the medium inceases and the time remains unchanged what
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