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Nady [450]
4 years ago
9

Electromagnetic radiation is:

Physics
1 answer:
icang [17]4 years ago
3 0
Kind of radiation including visible light, radio waves, gamma rays, and X-rays, in which electric and magnetic fields vary simultaneously. So, A.
You might be interested in
A girl on roller skates accelerates at a rate of 2 m/sec/sec with a force of 100 N. What is her mass?​
Dvinal [7]

By the newtons Second Law:

F = ma

Solving for m:

m = F / a

m =  100 N / 2 m/s²

<h3>m = 50 kg → ANSWER</h3>
8 0
3 years ago
What is a car’s acceleration if it increases its speed from 5 m/s to 20 m/s in 3 s? 10 m/s2 –15 m/s2 15 m/s2 5 m/s2
Vesna [10]

Answer:

5 m/s²

Explanation:

Acceleration = change in speed/time taken

20-5=15

15/3= 5 m/s²

6 0
2 years ago
What is the answer? quick
elena-s [515]
It would be A. 37.5 because if you multiply 50 and 15 it would be 750 then divide 20 it gives you 37.5.
8 0
3 years ago
In a gravitational-free environment, an object of unknown mass is connected to a spring with k = 40 N/m. The spring is compresse
iVinArrow [24]

Newton's Third Law of Motion states that springs exert a restoring force when they are pulled. The relationship between the spring force, spring constant, and spring displacement is governed by Hooke's Law.

Mass of the object= k*x/a= 26kg

what is Hooke's law?

The force (F) required to extend or compress a spring by a certain distance (x) scales linearly with respect to that distance, according to the empirical law known as Hooke's law.

according to  Hooke's law

f=-k x (-ve because spring is compressing)

from force equation f=ma m-=mass, a= acceleration , k=spring constant, x= displacemt due to compression

so, ma=-k x, (mass can not be -ve so remove -ve sign)

m=k x/a= 40*2/3=26.67 kg

To learn more about :  Hooke's law

Ref : brainly.com/question/7324904

#SPj9

5 0
2 years ago
How much work was done by a hot air balloon to lift up a 100 Newton to a height of 300 meters?
Monica [59]

So, the work was done by that hot air-balloon is <u>30,000 J or 30 kJ</u>.

<h3>Introduction</h3>

Hi ! In this question, I will help you. <u>Work is the amount of force exerted to cause an object to move a certain distance from its starting point</u>. In physics, the amount of work will be proportional to the increase in force and increase in displacement. Amount of work can be calculated by this equation :

\boxed{\sf{\bold{W = F \times s}}}

With the following condition :

  • W = work (J)
  • F = force (N)
  • s = shift or displacement (m)

Now, the s (displacement) can be written as ∆h (altitude change) because the object move to vertical line. The formula can also be changed to:

\boxed{\sf{\bold{W = F \times \Delta h}}}

With the following condition :

  • W = work (J)
  • F = force (N)
  • \sf{\Delta h} = change of altitude (m)

If an object has mass, then the object will also be affected by gravity. Always remember that F = m × g. So that :

\sf{W = F \times \Delta h}

\boxed{\sf{\bold{W = m \times g \times \Delta h}}}

With the following condition :

  • W = work (J)
  • m = mass of the object (kg)
  • g = acceleration of the gravity (m/s²)
  • \sf{\Delta h} = change of altitude (m)

<h3>Problem Solving</h3>

We know that :

  • F = force = 100 N
  • \sf{\Delta h} = change of altitude 300 m

What was asked :

  • W = work = ... J

Step by step :

\sf{W = F \times \Delta h}

\sf{W = 100 \times 300}

\boxed{\sf{W = 30,000 \: J = 30 \: kJ}}

<h3>Conclusion</h3>

So, the work was done by that hot air-balloon is 30,000 J or 30 kJ.

<h3>See More :</h3>
  • Work that he had done to lift object brainly.com/question/26341717
  • Converting work to potential energy brainly.com/question/26487284
5 0
3 years ago
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