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anyanavicka [17]
3 years ago
13

An engine raises 120kg of water through a height of 40m in 30s what is the power of the engine?(g=10m/s2​

Mathematics
2 answers:
oee [108]3 years ago
7 0

Answer:

4800J/s

Step-by-step explanation:

m = 120kg

H = 40m

t = 30sec

Input energy = 120 × g × H = mgn

Ei  = 120 × 40 × 30 = 144000J

Energy per sec, E1  = 144000  ÷ 30 = 4800J/s

Power input = 4800J/s  

lutik1710 [3]3 years ago
3 0

Answer:

4800J/s

Step-by-step explanation:

good luck have a nice day

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Bobby’s bedroom is 15 feet in length.how long is his bedroom on a scale drawing that uses a scale of 1/2 in = 3 feet
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Answer:

2.5 or 2 1/2

Step-by-step explanation:

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4 0
2 years ago
A store charges a restocking fee for any returned item based upon the item price. An item priced at $200 has a fee of $12. An it
lyudmila [28]

Answer:

Both ratios reduce to the same ratio 3/50, so the restocking fee is proportional.

Step-by-step explanation:

For the $200, the restocking fee is $12, so the ratio of the restocking fee to the price of the item is 12/200.

For the $150, the restocking fee is $9, so the ratio of the restocking fee to the price of the item is 9/150.

Now we find out if the ratios 12/200 and 9/150 are equal.

12/200 = 3/50

9/150 = 3/50

Both ratios reduce to the same ratio 3/50, so the restocking fee is proportional.

7 0
2 years ago
Notebooks cost $1.39 each. What are the possible numbers of notebooks that can be purchased with $10
murzikaleks [220]

Answer:

7

Step-by-step explanation:

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4 0
3 years ago
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Simplify <br><br> -2i sq.root -12
Darina [25.2K]

Answer:

= 4sqrt3

Step-by-step explanation:

-2i sqrt -12

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= -2i^2sqrt12

= -2(-1)sqrt12

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6 0
2 years ago
A concert hall has three sections: the main floor, the balcony, and the gallery. For a recent concert, 1020 tickets were sold. T
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Answer:

Gallery: g

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Step-by-step explanation:

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3 years ago
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