3 years ago

In the opposite figure, what is the

Physics

1 answer:

kvv77 [185]3 years ago

4 0

Answer:

Explanation:

since the resistance is not changing

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valkas [14]

Answer:

the answer is true.

Explanation:

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3 years ago

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A particle moves so that its position as a function of time in SI units is r = i + (3.0) t2 j + t k. Write expressions for its v

maksim [4K]

Answer:

i - component of V is zero for any value of t i-e no motion in this direction

Explanation:

Since

r= i+3 $t^{2}$ j+t k

==> V = $\frac{d r}{dt}$ = $\frac{d(i+3t^{2}j+kt) }{dt}$

= $6tj+k$

and acceleration is given by taking derivative of velocity w.r.t t

==> a= $\frac{dV}{dt}$ = $\frac{d(6tj+k)}{dt}$ = $6j$

so, V=0i+6tj+k

and

a = 0i+6j+k

i - component of V is zero for any value of t i-e no motion in this direction

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3 years ago

Which of the following scenarios will cause the current to stop flowing within a circuit?

statuscvo [17]

A. The switch within the closed circuit is opened.

If the switch is opened current will stop flowing, as the current will meet a gap, that is not connected by a conductor.

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3 years ago

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A train has a constant speed of 10 m/s around a track with a diameter of 45 m what is the centripal acceleration?

Bumek [7]

Answer:

$a_{c}= 4.44\frac{m}{s}$

Explanation:

When an object goes on a circular movement, it has a centripetal acceleration that always points toward the center of the circle, it is the responsible of the change of direction in the movement of the object. and that centripetal acceleration is related with the speed in the next way:

$a_{c}=\frac{v^{2}}{r}$ , with v the speed, r the radius of the track that is half of the diameter (22.5 m)