3 years ago

How much power is done when a 1 newton weighted object is raised a vertical distance of 1

Mathematics

1 answer:

STatiana [176]3 years ago

7 0

Answer:

P = 1W

Step-by-step explanation:

The power is the work done by a force, divided by the time it needed. The work of weight, since the object is raised is equal to:

W = weight × distance = 1 × 1 = 1 Joule

W = 1 J

P = W/t = 1 J / 1 s = 1 Watt

So P = 1 Watt

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The mean weight 20 students in a room is 65 kg one student one student who weight is 88kg went into the room what is the new mea

umka2103 [35]

The new mean is 66.09

<u>Explanation:</u>

Mean weight of 20 students = 65kg

One student with 88kg entered the room.

New mean = ?

$\frac{x_1+x_2+....+x_2_0}{20} = 65$

$\frac{x_1+x_2+....+x_2_0 + 88}{21} = ?$

The above equation can further be written as:

$x_1 + x_2 +....+x_2_0 = 65 X 20\\\\x_1 + x_2 +....+x_2_0 = 1300$

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Therefore, the new mean is 66.09

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2 years ago

3x + y = 19 , and x + 3y = 1. Find the value of 2x + 2y

soldi70 [24.7K]

$3x+y=19 \\
x+3y=1 \\ \\
\hbox{add the sides of the equations:} \\
3x+x+y+3y=19+1 \\
4x+4y=20 \\ \\ \hbox{divide both sides by 2:} \\
2x+2y=10$

The answer is d. 10.

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3 years ago

Joan wants to set a 4-digit unlock code for her mobile phone. She plans to use only odd numbers and to make sure that no number

LuckyWell [14K]

Answer: 120

Step-by-step explanation:

There are 5 digits that are odd, 1 3 5 7 9

There are 5 possibilities for the first digit, 4 for the second, 3 for the third, and 2 for the last, so there are 5 x 4 x 3 x 2 = 120

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7 months ago

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DedPeter [7]

Answer:

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Step-by-step explanation:

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V = 1/3 * 5 * 4 = 20/3

20/3 or 6.67 or 6 $\frac{2}{3}$

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1 year ago

Which expression is equivalent to 3\tfrac{1}{3}-8\tfrac{2}{3}3

Sholpan [36]

Answer:

and yeah ikr I don't understand why

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2 years ago