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Sphinxa [80]
3 years ago
14

If a ball is rolling in a straight line and you push it to the right its velocity will to the right

Physics
1 answer:
Keith_Richards [23]3 years ago
4 0

The answer would be "velocity will stay in the same direction." Since the ball is going in the same the ball is still going straight but just right. Many people get confused over velocity and speed, speed it the average amount on how fast a object is going and velocity is the amount of force a object has when it has speed. So, in this case since how the ball is going straight but just right it would stay in the same direction.

Hope this helps!

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WheN a car is driven some distance the air pressure in the tyre increases,why?
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According to Oxford Dictionaries, a spit take is an act of suddenly spitting out liquid one is drinking in response to something
Tasya [4]

Answer:

The pressure is p_1 = 4051.4 \ Pa

Explanation:

From the question we are told that

     The gauge pressure at the mouth is  p_1

     The radius of the column is  r_2 =  4 \ mm  =  0.004 \ m

    The speed of the liquid outside the body is  v_2 =  3.1 \ m/s

      The area of the column is  A_2

       The area inside the mouth A_1 = 10 A_2

Generally according to continuity equation

       v_1 A_1 =  v_2 A_2

=>       v_ 1 = v_2 *  \frac{A_2}{A_1}

=>      v_ 1 = 3.1 *  \frac{1}{10}

=>        v_ 1 = 0.31 \ m/s

So

      A_1 = 10A_2

=>   \pi * r_1^2 = 10(\pi * r_2^2)

=>   r_1 = 10 * r_2

substituting values

        r_1 = 10 * 0.004

        r_1 =0.04 \ m

Now the height of inside the mouth is  h_1 =  d =  2r_1 =  2* 0.04 =  0.08\ m

Now the height of the column is  h_2 =  d =  2r_2 =  2* 0.004 =  0.008\ m

Generally according to Bernoulli's  equation

        p_1 =  [\frac{1}{2}  \rho v_2^2 + h_2 \rho g +p_2] -[\frac{1}{2} \rho * v_1^2 + h_1 \rho g ]

Now  \rho =  1000 \ kg m^{-3} which is the density of water

        p_2 is the gauge pressure of the atmosphere which is  zero

 So

       p_1 =  [(0.5 * 1000 * (3.1)^2) +(0.008 * 1000 * 9.8) + 0]-

                                                  [(0.5 * 1000 * 0.31^2) + (0.08*1000 * 9.8)]                          

       p_1 = 4051.4 \ Pa

8 0
3 years ago
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4 0
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Alkaline batteries have the advantage of putting out constant voltage until very nearly the end of their life. How long will an
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Answer:

Explanation:

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t = 1.58 x 3600 second

t = 1.58 hours

8 0
3 years ago
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