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nlexa [21]
3 years ago
13

Why are radio waves considered harmless while ultraviolet waves and x-rats considered harmful

Physics
1 answer:
Anvisha [2.4K]3 years ago
7 0
 They are usually thought as harmful.
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The ph balance is maintained by which organ?
Lena [83]
The Kidneys And Lungs.
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" When the apple falls,does the apple also attract the earth?​
Gre4nikov [31]

Answer:

yes

Explanation:

masses attract each other

with a teeny-tiny force

8 0
3 years ago
While investigating the relationship between voltage, current, and resistance, students connected different batteries to differe
GuDViN [60]

Produced the model is the resistance of the circuits decreased as a battery voltage increased (option-B).

<h3>What connection does there exist between voltage and current, current and resistance, and voltage and resistance?</h3>

Ohm's Law describes how current, voltage, and resistance are related to one another. According to this, as long as the temperature doesn't change, the current flowing through a circuit is directly proportional to the applied voltage and inversely proportional to the resistance of the circuit.

The more work a certain quantity of electrons can accomplish at a given voltage. The quantity of electrons that are presently moving through any one point in a circuit at any particular time is known as the current. At the same voltage, a larger current can perform more work. Current times voltage equals power.

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4 0
1 year ago
A bird is flying with a speed of 18.0 m/s over water when it accidentally drops a 2.00 kg fish. If the altitude of the bird is 5
Alina [70]
Here we go.
My abbreviations; KE = Kinetic Energy; GPE = Gravitational Potential Energy.

So first off, we know the fish has KE right when the bird releases it. Why? Because it has horizontal velocity after released! So let’s calculate it:
KE = 1/2(m)(V)^2
KE = 1/2(2)(18)^2
KE = 324 J

Nice!
We also know that the fish has GPE at its maximum height before release:
GPE = mgh
GPE = (2)(9.81)(5.40)
GPE = 105.95 J

Now, based on the *queue dramatic voice* LAW OF CONSERVATION OF ENERGY, we know all of the initial energy of the fish will be equal to the amount of final energy. And since the only form of energy when it hits the water is KE, we can write:
KEi + GPEi = KEf
(Remember - we found the initial energies before!)
(324) + (105.95) = KEf
KEf = 429.95J
And that’s you’re final answer! Notice how this value is MORE than the initial KE from before (324 J) - this is because all of the initial GPE from before was transformed into more KE as the fish fell (h decreased) and sped up (V increased).

If this helped please like it and comment!
4 0
3 years ago
Unscramble this caybnetruopergs * starts with "T" ends with "S" <br> Please help me
dusya [7]
Typebars
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Sorry if this is not what you want me to do and I just threw a bunch of words at you. 
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3 years ago
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