Answer:
F_B = 0.12N
Explanation:
In order to calculate the magnetic force on the charge, you use the following formula:
(1)
q: charge of the particle = 4μC = 4*10^-6 C
v: speed of the charge = 7.5*10^4 m/s
B: magnitude of the magnetic field = 0.4T
The direction of the motion of the charge is perpendicular to the direction of the magnetic field. Then, the magnitude of the magnetic force is:
The magnetic force on the charge is 0.12N
Answer:
Explanation:
It is given that,
Height of the building, h = 245 ft
The base of the building and shadow is x.
Let is the angle of elevation that is formed by lines from the top and bottom of the building to the tip of the shadow. Using the trigonometric ratio as :
When x = 300 feet
So, the rate of change of the angle of elevation is -0.001633 rad/ft. Hence, this is the required solution.
Simple, A. None of the other answers make sense so, A.
1.
The wavelength of microwaves are longer than that of visible light . Please see the attached image to understand how visible light and microwaves differ in terms of wavelength. You will find that Visible light wavelength is in the range of 400-700 nanometers, or around
m, while microwave's wavelength is around
m.
2. As seen in the above explanation,visible light has a wavelength of around
m while microwaves have a wavelength of around
m. That means microwaves are
times the wavelength of visible light. That means
they differ in wavelength by 3-4 orders of magnitude