Answer:
500,000 hertz
Explanation:
Wavelength= 600 meters
Velocity(b) = 3 × 10^8
Frequency=?
Therefore the frequency can be calculated as follows
Velocity= frequency × wavelength
Frequency= 3 × 10^8/600
= 500,000 hertz
Hence the frequency is 500,000 hertz
Answer:
(a) Surface charge density is the charge per unit area.
(b)
(c)
Explanation:
(a) Surface charge density is the charge per unit area. The area of the square plate can be calculated by its side length.
Half of the total charge is distributed on one side and the other is distributed on the other side.
Therefore, surface charge density on each face of the plate is
(b) To find the electric field just above the plate, Gauss' Law can be used. Normally, Gauss' Law can only be used in infinite sheet (considering the flat surfaces), but just above the surface can be considered that the distance from the surface is much much smaller than the length of the plate (x << l).
In order to apply Gauss' Law, we have to draw an imaginary cylinder with radius r. The cylinder has to stay perpendicular to the plane.
The direction of the electric field is in the upwards direction.
(c) The magnitude of the electric field is the same as that of upper side. Only the direction is reversed, downward direction.
A mixture IS NOT a chemical combining of substances. If substances
combine chemically, then they form a compound, not a mixture.
57 2/3 meters per second, or 3460 meters per minute.