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Two identical conducting spheres, fixed in place, attract each other with an electrostatic force of 0.103 N when their center-to-center separation is 55.4 cm. The spheres are then connected by a thin conducting wire. When the wire is removed, the spheres repel each other with an electrostatic force of 0.0383 N. Of the initial charges on the spheres, with a positive net charge, what was
(a) the negative charge in coulombs on one of them and
(b) the positive charge in coulombs on the other?
Assume that the blocks accelerate as shown with an acceleration of magnitude a= 0.550 m/s^2 and that the coefficient of kinetic friction between block 2 and the plane is μ= 0.400. Find out the mass of block 2, m2, when θ= 30.0.
A 16 g bullet strikes and becomes embedded in a 1.10 kg block of wood placed on a horizontal surface just in front of the gun. what was the muzzle speed of the bullet
Calculate the absolute pressure at the bottom of a fresh-water lake at a depth of 30.8 m. Assume the density of the water is 1.00 103 kg/m3 and the air above is at a pressure of 101.3 kPa
You decide to determine the depth of a tank of water using the sun's light. With the sun overhead, the tank's bottom is lit, Approximately how deep is the tanks
A source has a half life of 30.2 years. It was created 19 years ago with an initial activity of 1 micro curie. Calculate the initial number of atoms in the sample
The head of a hammer with a mass of 1.5kg is allowed to fall onto a nail from a height of 0.70m, What is the maximum amount of work it could do on the nail
A hot air balloon decends toward the ground with a velocity of (1.6 m/s). A champagne bottle is opened to celebrate takeoff, expelling the cork horizontally with a velocity of (4.0 m/s) relative to the balloon.
A magnetic field is directed at a 40.0 angle to a plane circular loop of wire with a radius of 26.8 cm. a) Draw a diagram showing the wire loop, compute the induced emf in the wire loop
A 40-N crate rests on a rough horizontal floor. A 12- N horizontal force is then applied to it. find the magnitude of the frictional force on the crate
n object is projected from the surface of the earth with a speed of 1.98×104 m/s. What is its speed when it is very far from the earth
An automobile has a total mass of 2200 kg. It accelerates from rest to 70 km/h in 40 s. Assume each wheel is a uniform 44 kg disk. find the total kinetic energy of the automobile
at time t = 0 s, a puck is sliding on a horizontal table with a velocity 3.60 m/s, 35.0* above the + axis. What is the velocity of the puck at time t = 1.50 s
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