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3 years ago

A _ increases it decreases voltage in a power line

Physics

1 answer:

Levart [38]3 years ago

5 0

A transformer increases and decreases voltage.

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A student jumps off of a cliff into a river 25.9 m below. If the student landed 20.7 m horizontally away from where they jumped

lord [1]

Their probably dead but I’m not sure

6 0

3 years ago

A ball is thrown upwards at a velocity of 20.2m/s at what time will the ball reach its highest point

Andre45 [30]

Use the equation
$vf = vo + a \times t$
plug in the variables for the equation. Use 0 for Vf because at the highest point the velocity would be zero. Use -9.8 for acceleration because that is the speed at which gravity pulls down.
$0 = 20.2 + ( - 9.8) \times t$
your answer would be 2.06122 seconds.

7 0

4 years ago

A machinist turns the power on to a grinding wheel, at rest, at time t = 0 s. The wheel accelerates uniformly for 10 s and reach

Nookie1986 [14]

Answer:489 Revolutions

Explanation:

Given

Angular deceleration $(\alpha ) =1.5rad/s^2$

Given wheel angular velocity =96 rad/s when machine is turned off

time taken by machine to reach zero angular velocity

$0=\omega _0+(\alpha)t$

0=96+(-1.5)t

t=64 sec

angular displacement is given by

$\theta =\omega_0t+\frac{1}{2}\alpha t^2$

$\theta =96(64)-\frac{1}{2}(-1.5)(64^2)=3072 degree$

For revolutions = $\frac{3072}{2\cdot \pi}=488.86 \approx 489 revolution during Slowdown$

5 0

3 years ago

Risk-assessment models are used to _____.

pentagon [3]

<span>The answer is develop policies</span>

8 0

4 years ago

Read 2 more answers

A child, who is 45 m from the bank of a river, is being carried helplessly downstream by the river's swift current of 1.0 m/s. A

Degger [83]

Answer:

The lifeguard takes 25.9 seconds to reach the child, at 25.9 meters from the start point downstream.

Explanation:

As the image shows, the child trajectory, the lifeguard trajectory and the distance from the bank form a triangle. This triangle is formed by the distances, an we already know the distance from the bank and the speed of child, and the speed of the lifeguard. So we have unknom time in common. Lets see the equations:

Using phitagoras theorem

$45^{2}+(1*t_{1} )^{2} =(2*t_{2} )^{2}\\\\but\\t_{1} =t_{2} , then\\\\45^{2} =3t^{2} \\\\t=\sqrt{\frac{45^{2}}{3} } = 25.9seconds\\and replacing in X1= 25.9 meters$

8 0

4 years ago