3 years ago

A material that does not conduct electricity is called a... what?

Physics

1 answer:

xxTIMURxx [149]3 years ago

3 0

A material that does not conduct electricity is known as an insulator

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4 years ago

2. A car with mass 2,500 kg is travelling at 15 m/s. What is the car's kinetic energy?

BabaBlast [244]

Answer:

c, 280,000J

Explanation:

You should use the equation KE (Kinetic Energy) = $\frac{1}{2} mv^2$

m = 2500

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KE = $\frac{1}{2} * 2500 * (15)^2\\$

KE = 281250 Joules.

This is consistent with the answer B, as all of the parameters given to you are rounded to 2 significant figures so naturally, the answer should also be rounded to 2 sig figs.

KE = 280,000 J

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3 years ago

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3 years ago

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A car travels 70 miles in 80 minutes. Which is its average speed per minute

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Average speed=total distance travelled/time

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3 years ago

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The function s(t) represents the position of an object at time t moving along a line. Suppose s (2 )equals 146and s (6 )equals

sineoko [7]

Answer:

v(t) = 27 units

Explanation:

The function s(t) represents the position of an object at time t moving along a line such that,

$s(2)=146$

and

$s(6)=254$

We need to find the average velocity of the object over the interval of time [2,6]. The velocity of the object is equal to the total distance divided by time. It is given by :

$v(t)=\dfrac{s(6)-s(2)}{6-2}$

$v(t)=\dfrac{254-146}{6-2}$

v(t) = 27 units

So, the average velocity of the object is 27 units. Hence, this is the required solution.

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3 years ago