3 years ago

Before using wind energy to produce electricity, humans used wind energy to produce PLEASE ANSWER QUICKLY

Physics

1 answer:

topjm [15]3 years ago

8 0

Answer:

Water

Explanation:

windmills were used to bring water to farms in ancient times.

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You have two springs that are identical except that spring 1 is stiffer than spring 2, (k1 > k2). On which spring is more wor

kicyunya [14]

Answer:

Explanation:

Given

Two springs with spring constant $k_1$ and $k_2$

(a)If they are stretched using the same force

Force $F=k_1x_1=k_2x_2$

where $x_1$ and $x_2$ are the extension in the spring

so $\frac{k_1}{k_2}=\frac{x_2}{x_1}$

therefore $x_2 > x_1$

Work done is given by

$W=F\cdot x$

$W_1=F\cdot x_1$

$W_2=F\cdot x_2$

thus $W_2 > W_1$

(b)If they are stretched the same distance

$\frac{F_1}{F_2}=\frac{k_1}{k_2}$

Thus $F_1 > F_2$

For same extension, work done by Force 1 is more

$W_1 > W_2$

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4 years ago

Science is based on

Ostrovityanka [42]

None of them are the correct answers.

3 0

3 years ago

What is the half-life of a compound if 75 percent of a given sample of the compound decomposes in 60 min? assume first-order kin

LenKa [72]

The amount left of a given substance can be calculated through the equation,
A = (A0) x 0.5^n/h
From the given scenario,
A/A0 = 0.75 = 0.5*(60/h)
The value of h from the equation is 144.565 minutes.

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4 years ago

Calculate the weight of an object that has a mass of 100 kg on earth

finlep [7]

Answer:

W = 980 N

Explanation:

Weight = Mass x Gravity

Weight = (100kg) x (9.8 $\frac{m}{s^2}$ )

Weight = 980 N

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3 years ago

Which of the following Illustrates 2 resistors in a series circult? A, B, C, D.

Kaylis [27]

Answer:

It's either B or D, I'm not positive which it is

Explanation:

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2 years ago