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3 years ago

7

A storm is moving in quickly. The weather station reported that it is traveling west at 40 miles per hour. This information desc

ribes the storm's

1 answer:

Masteriza [31]3 years ago

8 0

This information describes the storm's velocity.

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State the law of conservation of machine

laiz [17]

Answer:

law of conservation of energy is that a perpetual motion machine of the first kind cannot exist, that is to say, no system without an external energy supply can deliver an unlimited amount of energy to its surroundings

Explanation:

Hope it helps.

Mark me as Brainliest plz!

3 0

2 years ago

Help !!!! Estimate the number of breaths taken by a person during 44 years?

Lisa [10]

44 x 12. I got the 12 from the total of 12 months in a year.

44 > 40

x
12 > 10
----------
The way my teacher taught me how to estimate is look at the neighbor to 44 and 12. The only time 44 can become 50, is when the neighbor is 5 or up. Same thing for 12. Now, multiply 40 and 10.

40 x 10 = 400.

Therefore, your estimate is 400.

The real answer is 520 breaths.

6 0

2 years ago

When measurements are close to their true values, they are said to be

katovenus [111]

Answer:

When measurements are close to true

value they are called to be accurate

Explanation:

3 0

2 years ago

Read 2 more answers

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

6 0

3 years ago

A ball is dropped from a height of 23.5 meters. Assuming no air resistance, how many seconds will it take the ball to hit the

Alex Ar [27]

Answer:

About 2.19 seconds

Explanation:

$d=v_ot+\dfrac{1}{2}at^2$

Since the ball is dropped from rest, there is no initial velocity, and you can write the following equation:

$23.5=\dfrac{1}{2}(9.8)t^2 \\\\t^2\approx 4.79 \\\\t\approx 2.19s$

Hope this helps!

8 0

3 years ago

Read 2 more answers