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Q1. Two large parallel metal plates are 1.7 cm apart and have charges of equal magnitude but opposite signs on their facing surfaces. Take the potential of negative plate to be zero. If the potential halfway between the plates is then +7.4 V, what is the electric field in (V/m) in the region between the plates?
Q2. Consider a standing wave on the string with a frequency equal to the fifth harmonic (fn = nf1 with n = 5). How many nodes and antinodes does this standing wave possess?
In order to clearly read a book 24 cm away, a farsighted girl needs an image to be 35 cm from her eyes. What focal length is necessary for lens in her eyeglasses.
Eight lights are connected in parallel to a 116 V source by two leads of total resistance 1.1. If 240 mA flows through each bulb, what is the resistance of each? What fraction of the total power is wasted in leads.
What is the coefficient of static between crate and incline
Find out an angle of the velocity vector
On another planet the simple pendulum consisting of a 0.154 kg mass suspended on a 1.20 m long string has a period of 3.860 seconds. What is acceleration on this planet.
What is an average acceleration of the dragonfly
A current of 2.5 a runs through 20 circular wire loops of diameter 10 cm. What is the magnetic field magnitude and direction at the center of the loops? (Show the derivation of any formula that you use.)
A 2,700-kg satellite is in a circular orbit around a planet. The satellite travels with a constant speed of 6,270 m/s. The radius of the circular orbit is 8.72 × 10^6 m. What is the acceleration of satellite.
How to find out the tension in the cable
What is the most amounts by which the wavelength of an incident photon could change when it undergoes Compton scattering from an atom or molecule with a 19 u mass .
If the beam now strikes the top of a building standing directly at the water's edge, find out the height of the building.
If the weight of a room full of water is so great, why don't the first floors of houses built over basements all collapse as flooded to the ceiling.
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