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KengaRu [80]
3 years ago
8

An object of mass 8 kg Is attached to a massless string of length 2 m And Suong With a tangentialVelocity of 3 m/s what isThe te

nsion in the string
Physics
1 answer:
Dmitry [639]3 years ago
8 0

Answer:

36 N

Explanation:

The tension on the string :

T =mv²/r ------where

m= mass of object = 8 kg

v= tangential velocity = 3 m/s

r= length of the string = 2m

T= [ 8 * 3² ] / 2

T= 36 N

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Compressional waves are mechanical.mechanical waves require a medium to travel. in a vacuum, there is no matter, so the waves cannot travel
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The speed of a sound wave depends on....
Hitman42 [59]
The answer you’re looking for is
D. the frequency
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A paintball is shot horizontally in the positive x direction at time t after the ball is shot it is 4 cm to the right and 4 cm b
Artist 52 [7]

<u>Answer:</u>

At time 2t the paint ball is at 8 cm to the right and 16 cm to the bottom

<u>Explanation:</u>

 We have equation of motion , s= ut+\frac{1}{2} at^2, s is the displacement, u is the initial velocity, a is the acceleration and t is the time.

Considering the horizontal motion of paint ball

    Distance traveled during time t = 4 cm

    Initial velocity = u m/s

   Acceleration = 0 m/s^2

So 4 = u*t+\frac{1}{2} *0*t^2\\ \\ u = \frac{4}{t}

Now at time 2t,

  S= u*2t+\frac{1}{2} *0*(2t)^2\\ \\=\frac{4}{t} *2t\\ \\ =8cm

  So horizontal distance traveled in time 2t = 8 cm to the right

Now considering the vertical motion of paint ball

  Distance traveled during time t = 4 cm

    Initial velocity = 0 m/s

   Acceleration = -g m/s^2

4=0*t-\frac{1}{2} *g*t^2\\ \\ t^2=\frac{-8}{g}

At time 2t,

     S=0*2t-\frac{1}{2} *g*(2t)^2\\ \\ =-\frac{1}{2} *g*4*\frac{-8}{g}\\ \\ =16 cm

 So vertical distance traveled in time 2t = 16 cm to the bottom

 

6 0
3 years ago
Match each type of wave to the way it moves.
oee [108]

Answer:

Transverse wave- Back and forth at right angles to the direction of the wave arrow.

longitudinal wave- bask and forth in the direction of the motion of the motion of the wave.

electromagnetic wave- two alternating waves moving at right angles to each other.

Explanation:

In a longitudinal wave, the particles vibrate at right angles in reference to the wave motion.

In a transverse wave, the particles vibrate parallel to the wave motion

Electromagnetic waves occur as a result of the interaction between two  waves and are normally transverse in nature.  

3 0
3 years ago
A syringe initially holds a sample of gas with a volume of 285 ml at 355 k and 1.88 atm. To what temperature must the gas in the
Mnenie [13.5K]

Answer:

The answer to your question is 720.5°K

Explanation:

Data

Volume 1 = 285 ml

Temperature 1 = 355 °K

Pressure 1 = 1.88 atm

Volume 2 = 435 ml

Temperature 2 = ?

Pressure 2 = 2.5 atm

Formula

To solve this problem use the combined gas law

               P1V1 / T1 = P2V2 / T2

- Solve for T2

               T2 = T1P2V2 / P1V1

- Substitution

               T2 = (355)(2.5)(435) / (1.88)(285)

- Simplification

               T2 = 386062.5 / 535.8

- Result

                T2 = 720.53°K

Conclusion

The gas must be heated to 720.5°K

4 0
3 years ago
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