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myrzilka [38]
2 years ago
11

How fast will a car at rest be going if it accelerate at 8m/s/s for 3s

Physics
1 answer:
aleksandr82 [10.1K]2 years ago
7 0

Answer:The car will be going 24 m/s.

Explanation:The car will be going 24m/s because it will have accelerated at 8m/s for 3 seconds and because acceleration is equal to change in velocity over time, the car's velocity will have increased by 24m/s over the 3 second interval.

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If the box weighs 40 newtons and is lifted a distance of 2 meters, how much work is done on the box?
Zarrin [17]

Answer:

The work done on the box is 80 J.

Explanation:

Given that,

Weight of box = 40 N

Distance = 2 meter

We need to calculate the work done

Using formula of work done

W=F\times x

W=mg\times x

Where, x = distance

mg = weight

Put the value into the formula

W=40\times2

W= 80\ Nm

W=80\ J

Hence, The work done on the box is 80 J.

5 0
4 years ago
What portion of the electromagnetic spectrum is most absorbed by the chlorophyll pigments in the thylakoid membranes?
nadya68 [22]

Answer: The visible part of the electromagnetic spectrum, <u>specifically blue and red wavelength</u>

Explanation:

Let's begin by explaining that pigments generally absorb more light than they reflect (they absorb certain wavelengths and reflect others). Therefore, the color that a given object seems to have depends on which parts of the visible electromagnetic spectrum are reflected and which parts are absorbed.

In this sense, in the thylakoid membranes there are two types of <u>chlorophyll pigments</u>:

-clorophyll b that absorbs the blue light of the electromagnetic spectrum

-clorophyll a that bsorbs the red light of the electromagnetic spectrum

That is why we generally see plants in green color and not in other colors.

4 0
3 years ago
The final stages of a star's life depend on its mas. true or false?​
Diano4ka-milaya [45]

Answer:

TRUE

Explanation:

Low mass stars last lots longer.

5 0
4 years ago
Which elements do hydrogen fuel cells combine to produce electricty
NARA [144]
A fuel cell combines hydrogen and oxygen to produce electricity, heat, and water. Fuel cells are often compared to batteries. Both convert the energy produced by a chemical reaction into usable electric power.
3 0
3 years ago
A stagehand starts sliding a large piece of stage scenery originally at rest by pulling it horizontally with a force of 176 N. W
Diano4ka-milaya [45]

<u>Answer:</u>

Option (a)

<u>Explanation :</u>

A stage hand starts sliding a large piece of stage scenery originally at rest by pulling it horizontally with a force of 176 N.

Hence Force applied  \text { Fapplied }=176 \mathrm{N}

Force on piece of scenery \mathrm{F}_{\mathrm{g}}=490 \mathrm{N}

\Sigma \mathrm{F} \mathrm{y}=\mathrm{F} \mathrm{n}-\mathrm{Fg}=0

\mathrm{Fn}=\mathrm{Fg}

\mathrm{FS}_{\mathrm{max}}=\mathrm{F}_{\mathrm{applied}}

µk = \frac{\mathrm{Fs} \max }{\mathrm{Fn}}

=  \frac{\text { Fapplied }}{\mathrm{Fg}}

=\frac{176}{490} =0.36

coefficient of static friction is 0.36

6 0
4 years ago
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