20,000 because I did the quiz and got it right txt me if you need help
Answer:
0.0016 T
Explanation:
Parameters given:
Diameter of wire = 5 mm = 0.005 m
Radius of wire, R = 0.0025 m
Number of turns, N = 200
Current through the wire, I = 0.10A
The magnitude of the magnetic field is given as:
B = (u₀NI) / (2πR)
Where u = magnetic permeability of free space.
B = (1.257 * 10⁻⁶ * 200 * 0.1) / (2 * π * 0.0025)
B = 0.0016 T
The magnitude of the Magnetic field is 0.0016 T.
With what you have here, there is no way to determine the volume. Do you have the density also?
Answer:
0.136 C
Explanation:
This question uses the simple idea of conservation of energy. We work with the assumption that energy loss is zero
At the top of the waterfall the water has maximum potential energy
Where
= Mass of water
= Acceleration due to gravity
= Height
Now at the bottom just before impact all of the potential energy is converted to kinetic energy and right after impact all this kinetic energy is converted to thermal energy ()
Where
= Mass of water
= Specific Heat Capacity of Water
= Change in Temperature
Equating the two equations
Since the value of is a constant, it is equal to 4186 J / (kg * C). We input all the given values into the equation and find the answer
Radio waves have a low frequency and a long wavelength. (A. low; long)
Explanation:
Electromagnetic waves are periodic oscillations of the the electric and the magnetic field in a plane perpendicular to the direction of motion the wave.
All electromagnetic waves travel in a vacuum at the same speed, which is known as the speed of light:
Electromagnetic waves are also divided into 7 different types, according to their wavelength and frequency. From shortest to longest wavelength (and therefore, from highest to lowest frequency), we have:
Gamma rays
X rays
Ultraviolet
Visible light
Infrared radiation
Microwaves
Radio waves
As we can see from the list, radio waves are the waves with lowest frequency and longest wavelength. They are used in telecommunications, satellite communications, and in general in long-distance transmission of signals. So, the correct answer is
Radio waves have a low frequency and a long wavelength.
Learn more about electromagnetic waves:
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