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3 years ago

On the electromagnetic spectrum, which represents the lowest and highest frequencies?

Physics

2 answers:

Alenkinab [10]3 years ago

5 0

Radio waves and gamma rays thanks :)

iris [78.8K]3 years ago

4 0

Explanation :

The electromagnetic spectrum describes the different types of waves. The spectrum is arranged in order of increasing wavelength or decreasing frequency.

We know that there is an inverse relation between the frequency and the wavelength i.e.

$f\propto\dfrac{1}{\lambda}$

The frequency of the gamma rays is $10^{19}\ Hz$ and the frequency of the radio waves is $300\ GHz$ .

So, the correct option is (b) " gamma rays have lowest frequency and radio waves have highest frequency".

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If for every action force an equal and opposite reaction force exists, how can anything ever be accelerated?

Anon25 [30]

The action and reaction forces act on different objects, therefore the net force is not always zero

Explanation:

Newton's third law of motion states that:

<em>"When an object A exerts a force (called action) on an object B, then object B exerts an equal and opposite force (called reaction) on object A"</em>

From the statement above, it is clear that the action and the reaction forces act on different objects. In fact, the action force acts on object B, while the reaction force acts on object A. This means that the two forces never appear in the same free-body diagram of the same object, and therefore when computing the net force acting on an object, we take into account only one of the two forces, never both.

For instance, imagine you are pushing a box along the floor with a force F (action). The box is exerting back on you a reaction force of equal magnitude in the opposite direction, - F. However, if we want to compute the net force on the box, we just take into account the action (F), not the reaction, because the reaction is acting on you, not on the box.

Therefore, the correct answer is

The action and reaction forces act on different objects, therefore the net force is not always zero

Learn more about Newton's third law:

brainly.com/question/11411375

#LearnwithBrainly

3 0

3 years ago

The volume of a gas depends upon its mass true or false

Kruka [31]

I would say false because the volume of gas depends on several things the amount of matter in the volume , the pressure and the temperature. So the answer would be false in my opinion. Because mass is not the only factor

4 0

3 years ago

A system has 4 independent and identical motors, in order for the system to work, at least one of the motors must operate. Each

grin007 [14]

Answer:

The system's Mean Time to Failure is 1,041. $\bar 6$ hours

Explanation:

The number of independent identical motors = 4

The failure rate of each motor, λ = 0.002 failures per hour

Given that in order for the system to work, at least one of the motors must operate, therefore, the system are in parallel

The Mean Time to Failure for a parallel system of four identical components is given as follows;

$MTTF = \dfrac{1 }{\lambda} \times \left (1 + \dfrac{1}{2} + \dfrac{1}{3} + \dfrac{1}{4} \right)$

Which gives;

$MTTF = \dfrac{1 }{0.002} \times \left (1 + \dfrac{1}{2} + \dfrac{1}{3} + \dfrac{1}{4} \right) = 1,041.\bar 6$

The system's Mean Time to Failure = 1,041. $\bar 6$ hours.

8 0

3 years ago

Who was albert einstien describe his contributions???

olga nikolaevna [1]

Answer:

Albert Einstein was from Germany he was born theoritical physicist, from childhood only he loved mechanical toys, he was highly gifted in Mathematics, He was a world citizen and a scientific genius too. His contribution were:

1) he developed the theory of relativity

2) he also discovered the process of nuclear fission

3)he developed the quantum theory of specific heat

4)theory of stimulated emission, on which laser device technology is based

5) law of photoelectric effect

hope it helped you :)

6 0

3 years ago

Can u get this right?

Anika [276]

I think it’s probably d

7 0

3 years ago