Light is created by vibrations in electric and magnetic fields because the light is an electromagnetic wave, therefore the correct answer is option C
The oscillation of an electric field and a magnetic field produces electromagnetic waves, which are waves. In other words, electromagnetic waves (EM waves) are made up of vibrating magnetic and electric fields that are orthogonal to one another.
It is undeniable that we experience solar radiation, which is an electromagnetic wave that originates from the sun and can travel through space to the planet.
Light is a form of electromagnetic which is made up of the electric and magnetic filed that are orthogonal to each other, light can travel without any medium.
Thus, Light is created by vibrations in electric and magnetic fields, because the light is an electromagnetic wave, therefore the correct answer is option C
Learn more about Electromagnetic waves from here
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Answer:
b
Explanation:
light does not need a medium
it is refracted
Light is made up of little packets of energy called photons.
electromagnetic waves
Answer:
Decrease the friction between the wheels and the track.
Explanation:
Decrease the friction between the wheels and the track. Friction opposes motion. If the amount of friction is decreased, the speed of the cars should increase.
This answer is for the question on usa testprep
heat is added to it?
The mass of the water is 41.9 g
Explanation:
When an amount of energy Q is supplied to a sample of substance of mass m, the temperature of the substance increases by , according to the equation:
where:
m is the mass of the substance
is the specific heat capacity of the substance
is the change in temperature
In this problem, we have:
Q = 525 J is the amount of heat supplied to the water
is the change in temperature of the water
is the specific heat capacity of the water
Solving for m, we find the mass of the water:
Learn more about specific heat capacity:
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36.0 Ω
19.6 Ω
18.3 Ω
25.9 Ω
Answer:
Total resistance is 19.6 Ω for the circuit .
Explanation:
Given:
Six resistors of a circuit namely to .
Where
and are in series.
and are in parallel.
and are in parallel.
We know that continuous resistor which are in series are added up to find the equivalent resistance.
Similarly resistors which are arranged in parallel their equivalent resistance is for the case of and .
According to the question:
Total resistance = R(equivalent) :
⇒
⇒
⇒
⇒
⇒ Ω
So the total resistance of the circuit depicted is 19.58 Ω approximated to nearest tenth that is 19.6 Ω
I think you are right on 1,2 and 4. I believe the answer would be D?!
hope this helps