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The resistance of an electric stove element at operating temperature is 11 \Omega
1. If 220 V are applied across it, what is the current during the stove element?
2. How much energy does the element convert to thermal energy in 30.0 s?
3. The element is being utilized to heat a kettle containing 1.20 kg of water. Suppose that 70 percent of the heat is absorbed by the water. What is its increase in temperature during the 30.0 s?
A beam of electrons is incident on two slits separated by a distance of 2.0×10-6 m. Calculate the kinetic energy of the electrons
a typical cost for electric power is 12.0 per kilowatt-hour. a some people leave their porch light on all the time.
an organ pipe is 2.0m long.Assume the pipe is cylindrical with one closed and one open end. what is the longest wavelength for a standing sound wave
In a typical fender bender, a 1500 kilogram car traveling at 48 kilometer per hour collides in elastically with a 1200 kilogram car traveling at 32 kilometer per hour in the similar direction. Determine how much of the initial kinetic energy of th..
A sphere with radius 0.205m has density ? that decreases with distance r from the center of the sphere according to ?=3.25×103kg/m3?(9.25×103kg/m4)r, calculate the moment of inertia of the sphere for an axis along the diameter
Calculate the wavelength of light emitted by a hydrogen atom when an electron makes a transition from n=8 to n=2 levels
the membrane surrounding a living cell consists of an inner and an outer wall that are separated by a small space.
It is always told as a fact without explaining the reason. Why do two objects get charged with rubbing? Why one object obtains negative charge and other get positive charge?
A block is connected between two springs on a frictionless, horizontally level track. calculate what is the mass of the block
A wedge of air is formed between two glass plates that are 9.0 cm long, with one edge touching, How far apart are the maxima for the reflected light with ? = 665 nm
Suppose 60kW is to be transmitted over two 0.150? lines, Estimate how much power is saved if the voltage is stepped up from 200V to 2000V
A spring is stretched between two posts. When a pulse is produced at one end of the spring, it makes 4 back-and-forth trips along the spring in 3.4 s. If the pulse has a propagation speed of 12 m/s, how far apart are the posts?
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