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Consider a square of side 61 cm. Let one corner, point P, be charge-free, while the other three of the four corners have point charges at them. The corner opposite to (and most distant from) point P has charge Q = 47 nanocoulomb. The two corners nearer to P have charges +5Q and -4Q, respectively. Assuming that the potential V = 0 at a great distance, what is the potential (in volts) at point P?
A rocket is fired straight upp from the ground with a 2.25 m/s acceleration. what is the speed of the rocked when the engines stop
A small magnet of length 7.1 cm is placed at an angle of 80 degree to the direction of uniform magnetic field of magnitude 0.01 T. The observed torque has a magnitude of 0.07 N m. Find the magnetic moment of the magnet.
A constant force of magnitude F makes an angle ? (measured counterclockwise) with the positive x direction as it acts on an object of mass m moving in the xy plane. How much work is done on the object by the force
A certain particle has the life time of 10^-7 s, while measured at rest. How far does it go before decaying if its speed is 0.99 c when it is created.
a 2 kg uniform flat disk is thrown into the air with a linear speed of 10 m/s. As it travel the diak spins at 3.0 rev/s. what is the magnitude of its angular momentum
An 800-kHz radio signal is detected at a point 4.5 km distant from a transmitter tower. What is the magnetic field amplitude of the signal at that point
You exert a force as shown in the diagram to push a large crate of books (about 1 m high, m = 45.0 kg) across a rough floor at constant speed v = 0.650 m/s. Find the rate at which work is done by you
question1a sealed well-insulated 2000ml thermos bottle with negligible heat capability is completely empties - a
A flower pot falls from the ledge of a building. A person in an apartment below, coincidentally holding a stopwatch, notices it takes 0.7s for the pot to fall past his window, which is 18m high. g=9.81m/s2. How far above the top of the window is t..
A glass capillary tube with a diameter of 8.5 mm and length 16 cm is filled with a salt solution with a resistivity of 3.4 ?m. What is the resistance?
Two people carry a heavy electric motor by placing it on a light board 2.00 m long. One person lifts at one end with a force of 100 N, and the other lifts the opposite end with a force of 900 N.
A rectangular plate has a length of (20.4 0.2) cm and a width of (8.7 0.1) cm. Calculate the area of the plate
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