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True/False:
1) Adding a dielectric between the plates of an air capacitordecreases its capacitance.2) The capacitance of a parallel plate capacitor is proportional tothe area of the plates.3) Capacitance is the property of a device that enables it to storecurrent.4) Charge is stored in the dielectric medium between the plates ofa capacitor.5) The charges on the two plates of a capacitor are equal inmagnitude and sign.
Consider neon, a noble gas whose molecules consist of single atoms of atomic mass 0.02 kg/mol. Avogadro's number is 6.02 × 1023 mol-1, what is the average kinetic energy of a neon atom
A violinist is tuning her instrument to concert A (440Hz). Now, when she tightens her violin strings slightly she hears 4.00 beats per second. What was the frequency of her violin
To a person swimming 0.790m beneath the surface of the water in a swimming pool, what is the actual height of the diving board above the surface of the water
Each of the space shuttle's main engines is fed liquid hydrogen by a high-pressure pump. Turbine blades inside the pump rotate at 469 rev/s. A point on one of the blades traces out a circle with a radius of 0.639 m as the blade rotates. What is the m..
Forces in a Three-Charge System Coulomb's law for the magnitude of the force between two particles with charges and separated by a distance is , where , and is the permittivity of free space.
Consider an object on an incline where friction is present. The angle between the incline and the horizontal is ? and the coefficient of kinetic friction is ?k. Find an expression for the acceleration of this object
A hydraulic jack has an input piston area of 4.5 cm^2 and an output piston area of 21 cm^2. what force must be applied to the input piston in order to raise a load of 850 N
A lid is put on a box that is 11 cm long, 11 cm wide, and 8.0 cm tall and the box is then evacuated until its inner pressure is 4.2 104 Pa. How much force is required to lift the lid at sea level
Two stationary positive point charges, charge 1 of magnitude 3.10 nC and charge 2 of magnitude 1.74 nC, are separated by a distance of 36 cm. An electron is free from rest at the point midway between the two charges, and it moves along the line con..
how much power must you exert to horizontally drag a 30.0kg table 12.0m across a brick floor in 25.0s at constant
Suppose a satellite is in a circular orbit 3.0 Earth radii above the surface of the Earth (3.0 Earth radii from the center of the Earth). By how much does it have to increase its speed in order to be able to escape Earth?
Two blocks on a frictionless table, A and B, are connected by a massless string. What is the ratio (ma/mb) of the blocks masses
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