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Pachacha [2.7K]
2 years ago
14

Which of the following technologies would produce the most energy in light waves?

Physics
1 answer:
Finger [1]2 years ago
8 0

Answer:

D. Ultraviolet disinfecting wand.

Explanation:

Energy in light waves depends upon the frequency o the waves. Higher the frequency of the waves, higher the amount of energy it carries. Similarly, waves with shorter wavelength has higher frequencies and thus more energy.

Ultraviolet disinfecting wand would produce most energy out of the four options because it produce UV waves which have shorter wavelength and higher frequency.

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An electromagnetic wave is transporting energy in the negative y direction. At one point and one instant the magnetic field is i
natali 33 [55]

Answer:. Option c

Explanation: the speed of an electromagnetic wave is simply the vector product of the magnetic field and the electric field.

The direction of the velocity is the direction of the electromagnetic wave.

The wave is already moving towards the negative y axis (-j) and the magnetic field is already pointing towards the positive x axis (i)

From cross product of unit vectors

i × j = k

i × k = - j

With the second identity, we can see that the electric field will be pointing towards the positive of the x axis (k).

Option c is validated

4 0
2 years ago
What is first class lever ? can you pease say where is does the fulcrum ,load and effort​
valkas [14]

Answer:

In first class lever the fulcrum lies between the effort and the load the effort lies on the left side and load lies on the right side .

Explanation:

hope this helps

7 0
2 years ago
Craig Terrill has many _________. Press enter to interact with the item, and press tab button or down arrow until reaching the S
iren2701 [21]

Answer:

is there anything that is a hint? like a picture or a story?

Explanation:

7 0
2 years ago
When a plane flies with the​ wind, it can travel 1575 miles in 3.5 hours. when the plane flies in the opposite​ direction, again
Zepler [3.9K]

When plane is flying along the wind then we can say

V_{plane} + v_{wind} = \frac{distance}{time}

V_{plane} + v_{wind} = \frac{1575}{3.5}

V_{plane} + v_{wind} = 450 mph

Now when its going against the wind the speed is given by

V_{plane} - v_{wind} = \frac{distance}{time}

V_{plane} - v_{wind} = \frac{1575}{4.5}

V_{plane} - v_{wind} = 350 mph

Now by the above two equations we will have

V_{plane} = 400 mph

v_{wind} = 50 mph

3 0
3 years ago
The most abundant element in earth's continental crust (by weight) is____?
sashaice [31]
The answer is A. Oxygen
8 0
3 years ago
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