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When point charges q1=+8.4uC and q2 = +5.6uC are brought near each other , each experience a repulsive force of magnitude 0.66 N. Determine the distance between the charges.
This time, William Tell is shooting at an apple that hangs on a tree . The apple is a horizontal distance of 20.0m away and at a height of 4.00m above the ground, what is the arrow's initial velocity
An electron is released from rest in a uniform electric field of magnitude 2.31 x 10^4 N/C. Calculate the acceleration of the electron
You measure the activity of a radioactive sample, then wait a few days and measure it again. What is the half-life of the substance
When a force of 19.0 N is applied to a spring, it elongates 0.0858 m. find out the period of oscillation of a 4.0 kg object suspended from this spring.
A person with a black belt in karate has a fist that has a mass of 0.70 kg. What is the magnitude of the average net force
A sledge loaded with bricks has a total mass of 17.8 kg and is pulled at constant speed by the rope inclined at 20.4° above the horizontal. The sledge moves a distance of 20.7 m on a horizontal surface. The coefficient of kinetic friction between ..
A hollow, thin-walled sphere of mass 12.0kg and diameter 47.0cm is rotating about an axle through its center. find the angular momentum of the sphere
An ideal massless spring is hanging vertically. When an unknown mass is attached to the spring, the spring stretches by 4.8 cm before reaching a new equilibrium. What is the frequency of the resulting oscillation
A 33.4 cm focal-length converging lens is 24.8 cm behind a diverging lens. Parallel light strikes the diverging lens. What is the focal length of the diverging lens
An electrical load operates at 240 V rms. The load absorbs an average power of 8 kW at a lagging power factor of 0.8. Calculate the complex power of the load
A rotating door is made from four rectangular sections, as indicated in the drawing. The mass of each section is 80kg. A person pushes on the outer edge of one section with a force of F = 72N that is directed perpendicular to the section. Find out..
Humid air breaks down in a sufficiently strong electric field, What is the magnitude of the electrostatic force for an electron and for an ion with a single electron missing
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