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A system of 1402 particles, each of which is either an electron or a proton, has a net charge of -7.520 x 10-17 C. Determine how many electrons are in this system?
Find what is the mass of this system?
A toy car is driven by a battery of 9V. it draws a current of 2mA. what is the resistance of the car
Young David who slew Goliath experimented with slings before tackling the giant. He found that he could revolve a sling of length 0.450 m at the rate of 10.0 rev/s. What is the speed of the stone for each rate of rotation
A 246 kg wooden raft floats on a lake. as a 85 kg man stands on the raft, it sinks 5.0 cm deeper into the water. When he steps off, the raft vibrates for a while.
Two sound sources radiating in phase at a frequency of 485 Hz interfere such that maxima are heard at angles of 0 and 22° from a line perpendicular to that joining the two sources. Find out the separation between the two sources.
An air-core solenoid has a length of 27.1 cm, a cross-sectional area of 0.0454m2, By how much does the magnetic flux through the solenoid change
An enemy ship is on the east side of a mountainous island. find what are the distances from the western shore at which a ship can be safe from the bombardment of the enemy ship
A lunch tray is being held in one hand, as the figure illustrates. The mass of the tray itself is 0.247 kg, and itscenter of gravity is located at its geometrical center. On the trayis a 1.01-kg plate of food and a 0.254-kg cup of coffee.
The G string on a violin has a fundamental frequency of 196 Hz. It is 33.0 cm long and has a mass of 0.500 g. what is the effective length of her string
A 1500 Kg car takes 45 minutes to climb from an elevationof 1800 m to 2800m, as the car drives along a mountain road. How much work did the car do against gravity
A pair of closely spaced parallel conducting plates, charged with equal and opposite electric charges, produces a uniform electric field in the region between them. What must the strength of the electric field be
The angle of incidence at a solid/liquid boundary is 60.4°, and the index of refraction of the solid is n = 1.96. Find what must be the index of refraction of the liquid such that the direction of the light entering the liquid is not changed
A gas is compressed adiabatically by a constant force of 10 N that acts over a 0.5 m distance. What is the change in the internal energy of the gas
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