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dem82 [27]
3 years ago
6

Screw cannot be driven if there is no force​

Physics
2 answers:
Sedaia [141]3 years ago
8 0

Answer:

Explanation:

trye

Leya [2.2K]3 years ago
6 0

answer..

if this is a true or false question it is true

hope my ans helps

please give brainliest to my answer

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have a good day

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11 cm/s2 is an example of<br> 30 m/s northwest is an example of
aivan3 [116]

Answer:

The First is an example of acceleration, the second is an example of velocity

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Which is happening when humans control the breeding of living things to favor certain desired features?
77julia77 [94]
Selective breeding. That is, breeding which uses extreme selectivity
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If you had a rock with a volume of 237 ml and a density of 4.52 g/ml how much mass would it have?
larisa [96]

Explanation:

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= 237ml * (4.52g/ml)

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2 years ago
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3 years ago
A car slows down uniformly from a speed of 30.0 m/s to rest in 7.20 s
Ede4ka [16]

When acceleration is constant, the average velocity is given by

\bar v=\dfrac{v+v_0}2

where v and v_0 are the final and initial velocities, respectively. By definition, we also have that the average velocity is given by

\bar v=\dfrac{\Delta x}{\Delta t}=\dfrac{x-x_0}{t-t_0}

where x,x_0 are the final/initial displacements, and t,t_0 are the final/initial times, respectively.

Take the car's starting position to be at t_0=0\,\mathrm s. Then

\dfrac{v+v_0}2=\dfrac{x-x_0}t\implies x=x_0+\dfrac12(v+v_0)t

So we have

x=0\,\mathrm m+\dfrac12\left(0\,\dfrac{\mathrm m}{\mathrm s}+30.0\,\dfrac{\mathrm m}{\mathrm s}\right)(7.20\,\mathrm s)=108\,\mathrm m

You also could have first found the acceleration using the equation

v=v_0+at

then solve for x via

x=x_0+v_0t+\dfrac12at^2

but that would have involved a bit more work, and it turns out we didn't need to know the precise value of a anyway.

7 0
3 years ago
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