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hoa [83]
4 years ago
5

PLEASE HELP ME!! What is the difference between direct current and alternating current?

Physics
1 answer:
Paha777 [63]4 years ago
6 0
In a direct current the electric charge flows in one direction.
in an alternating the electric charge changes in its direction periodically.
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The branch of science concerning heat flow and energy conversions is called
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Hello there! the answer is thermodynamics.

Someone in the thermodynamics field often studies how heat works and interacts with different types of energy, making this the best answer choice.

I hope this helps and have a great rest of your day!

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3 years ago
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A ball rolling down a hill for 9 seconds accelerates from 3 m/s to 34.5 m/s. What is the ball's rate of acceleration?
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If you are heavy, you will see no benefit from exercise. true or false?
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The coefficient of static friction between a 2.5 kg block and a rough surface is .80. What is the maximum static frictional forc
stich3 [128]

Answer:

19.6 N

Explanation:

Static friction is a force that keeps an object at rest.Once an object exceed the maximum limit of it , it starts moving

If a small amount of force is applied to an object, the static friction has an equal magnitude in the opposite direction.

If the force is increased, at some point the value of the maximum static friction will be reached, and the object will start moving.

force of static friction = (coefficient of static friction) * (normal force)

Fmax = μ R

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  • R = normal force
  • Fsmax = maximum force of static friction

Fmax = μ R  = μ mg   (where g = 9.8 ms⁻²)

         = 0.80 * 2.5 * 9.8

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3 0
4 years ago
What is the distance in m between lines on a diffraction grating that produces a second-order maximum for 775-nm red light at an
8090 [49]

Answer:

The distance is d =  1.747 *10^{-6} \ m  

Explanation:

From the question we are told that  

       The order of maximum diffraction is  m =  2

         The wavelength is   \lambda  =  775 nm  = 775 * 10^{-9}  \ m

         The angle is  \theta =  62.5^o

Generally the   condition for  constructive  interference for diffraction grating  is mathematically represented as

          dsin \theta  =  m *  \lambda

where  d is  the distance between the lines on a  diffraction grating

     So  

            d =  \frac{m *  \lambda  }{sin (\theta  )}

substituting values  

           d =  \frac{2  *  775 *1^{-9} }{sin ( 62.5  )}

          d =  1.747 *10^{-6} \ m

   

4 0
3 years ago
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