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My name is Ann [436]
3 years ago
11

An elevator weighing 15,000 newtons is raised one story in 50 seconds. If the distance between stories is 3.0 meters, how much p

ower is required of the motor? 750,000 W 45,000 W 5,000 W 900 W
Mathematics
2 answers:
Pavel [41]3 years ago
8 0
Power
= Work done  /  Time
= 15000 N * 3 m / 50 s
= 45000/50  N-m/s
= 900 W

It may sound like an extremely low value, but 3.0 / 50 s is also a very slow speed.

Trava [24]3 years ago
8 0

The answer is:

900 Watts

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Estimate the circumference of a circle that has a radius of 11 m simplify it.
Zanzabum

ANSWER

C=22\pi \: m

EXPLANATION

The circumference of a circle is calculated using the formula:

C=2\pi \: r

where r=11 meters is the radius of the circle.

Let us substitute the radius into the formula to obtain,

C=2\pi \:  \times 11

This simplifies to:

C=22\pi

When we substitute

\pi = 3.14

We get

C=22(3.14) = 69.08m

to the nearest hundredth.

3 0
3 years ago
Find the value of x in the equation below 4=x/5
victus00 [196]

Answer:

x = 9. Rearrange variables to the left side of the equation: - x = - 5 - 4

Calculate the sum or difference: x=9

Step-by-step explanation:

3 0
1 year ago
Read 2 more answers
If the variance is 28 kg2 what is the standard deviation?
ikadub [295]

Answer:

The standard deviation is 5.29 kg.

Step-by-step explanation:

The standard deviation is the square root of the variance. Mathematically, we have that:

S(X) = \sqrt{V(X)}

In this problem, we have that:

V(X) = 28

So

S(X) = \sqrt{V(X)}

S(X) = \sqrt{28}

S(X) = 5.29

The standard deviation is 5.29 kg.

7 0
2 years ago
Rosemary is driving to Chicago, and she is 84 miles away. She wants to arrive in 1.5 hours. What rate of speed will she have to
vagabundo [1.1K]

Answer:

56 mph

Step-by-step explanation:

Process of elimination. 126 mph is much too high because it's more than the distance and they will arrive too early. 65 + 65 ÷ 2 = 97.5, that's more than 84 miles. The reason we divide by 2 is because of the .5. Now all we have is 56 mph. To check, 56 + 56 ÷ 2 = 84

4 0
2 years ago
A contest on a game show has 30 points.she answers a question correctly to win 15 points.the she answers a question incorrectly
Oksanka [162]
5 points, because I think you’re saying they started off with 30 points and they answered a question wrong a lost 25 so 30-25 is 5.
8 0
2 years ago
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