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The electric field of a capacitor remains unchanged, if the plates change their separation, but the charges remain the same. Show with equations the new energy of the capacitor relative to the initial energy, if the separation is doubled.
Calculate Escape Velocity for Mars (mass = 6.42 x 1023 kg, radius = 3397km). Is it easier to launch a rocket from Mars than the Earth
A cave rescue team lifts an injured spelunker directly upward andout of a sinkhole by means of a motor-driven cable. The lift isperformed in three stages, each requiring a vertical distance of15.0 m:
A hollow sphere of mass 1000kg and radius 25cm is rolling down an incline plane, making a beta angle horiozntally 30degrees. calculate the moment of inertia of the hollow sphere
A 400 N stun pilot who has been driving his fighter plane vertically pulls out of the dive by changing her course to a circle in a vertical plane. what is the apparent weight of the pilot at the lowest point
A dc motor with its rotor and filed coils connected in series has an internal resistance of 3.2 ?. What is the power delivered to the motor
A converging lens is located 10.0 cm to the left of a diverging lens. The focal length of the converging lens is +20.0 cm. where is the final image formed by the diverging lens
An industrial laser is used to burn a hole through a piece of metal. The average intensity of the light is = 1.42 × 109 W/m2. find the magnetic field in the electromagnetic wave emitted by the lase
There are two objects. For object 1 the net force is 2 N pointing left on x axis. For object 2 the total force on the object is 0 N. What will their future motions be
A railroad car of mass 24000 kg is moving with a speed of4.03m/s. It collides and couples with three other coupled railroadcars, each of the same mass as the single car and moving in thesame direction with an initial speed of 2.02m/s.
question a 182 mh inductor whose windings have a resistance of 8.20 omega is connected across a 9 v battery with an
question when an electroscope is charged its two leaves repel each other and remain at an angle. what balances the
An electron is moving with a speed of 0.85c in adirection opposite to that of a moving photon. Calculate the relative velocity of the photon with respect to the electron
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