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Four stars with equal masses m=1.99×1030 kg are located at the corners of a square, each side of which is ?=4.81E16 m . What is the magnitude of the net force on the star at the origin?
Two point charges Q1, and Q2 are place exactly on the x axis at -x1. A second particle Q2 is placed at +x2 on the positive x axis. What is the total E field at the origin
The first star on the handle of the Big Dipper and the star that forms the far bottom edge of the bowl(Merak).
The pressure in the fluid at the distance from the axis of rotation is. You may ignore the variation in pressure with depth; suppose that it is much smaller than the variation in pressure with radius.
The electric field at point P just outside the outer surface of a hollow spherical conductor of inner radius 15 cm and outer radius 31 cm has magnitude 465 N/C and is directed outward.
A steel cable has a cross-sectional area 3.44 × 10-3 m2 and is kept under a tension of 1.53 × 104 N. The density of steel is 7860 kg/m3. Note that this value is not the linear density of the cable. At what speed does a transverse wave move along t..
The wavelength of red helium-neon laser light is 632.8 nm. What is the wavelength of the laser light in the class that has an index of refraction of 1.5 in units of nm, What is the speed of the laser light in the glass in units of 10^8 m/s
A ball is thrown so that its initial vertical and horizontal components of velocity are 60 m/s and 15 m/s, estimate the ball's total time of flight
Illustrate what is the magnitude of the apparent weight of a 78kg astronaut 5200km from the center of the Earth's moon in a space vehicle moving at constant velocity?
An RL circuit with L = 3 H and an RC circuit with C = 5 µF have the same time constant, What is this common time constant
How many protons hit the target. How much energy is delivered to the target each second if the protons each have a kinetic energy of 30 MeV and lose all of their energy in the target.
What work is done by the electric forc. begin from rest, a boat increases its speed to 4.00 m/s with constant acceleration. What is the boat's average speed.
A 2 200-kg pile driver is used to drive a steel I-beam into the ground. calculate the average force the beam exerts on the pile driver while the pile driver is brought to rest
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