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Supercapacitors, with capacitances of 1 F or more, are made with plates that have a spongelike structure with a very large surface area. Determine the surface area of a supercapacitor that has a capacitance of 4.9 F and an effective separation between the plates of d = 1.03 mm.
A train moving at a constant speed of 58.0 km/h moves east for 46.0 min, then in a direction 57.0° east of due north for 14.0 min, What is the average velocity of the train during this run
A train is traveling at 100 m/s. The engineer applies the brakes because he sees the Batmobile stuck on the tracks ahead. How long does it take the train to reach the Batmobile
At what angle should the highway engineer bank. What is the magnitude of the acceleration.
If the current through the inductor (L = 25.1 mH) at 351 Hz has an amplitude of 45 mA, what is the rms value of the AC voltage
A 4,000-kg satellite is traveling in a circular orbit 200 km above the surface of the Earth. What is the force of gravity on the marble as viewed by the observers on the Earth
A 0.810 kg particle has a speed of 2.60 m/s at point A and kinetic energy of 8.80 J at B. What is its speed at B? reply in units of m/s.
A force of magnitude 610.0 N stretches a certain spring by 0.230 N from its equilibrium position. How much elastic potential energy is stored in the spring when it is stretched 0.300 m from its equilibrium position
A wooden block of mass m = 9 kg starts from rest on an inclined plane sloped at an angle from the horizontal. find the magnitude of the kinetic frictional force on the block
The position of a rocket sled on a straight track is given as x = a t3 + b t2 + c, What is the sled's average speed between t = 3.48 s and t = 6.92 s
A diver on a diving board is undergoing simple harmonic motion. Her mass is 55.0 kg and the period of her motion is 0.800 s. What is his mass if the mass of the board is negligible
When an electron in a hydrogen atom falls from a higher energy state down to the ground state, What is the quantum number of the level from which the electron fell
A disk rotates about its central axis starting from rest and accelerates with constant angular acceleration. find the number of radians from rest until the time the disk reaches the 5.5 rad/s angular speed
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