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2 years ago

What is true about coal as an energy source

Physics

1 answer:

seropon [69]2 years ago

6 0

Nonrenewable............................

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you work at a Dave's donut shop the shop sells a dozen donuts for 6.99 dollars Dave redesigned the Box used to hold one dozen do

Fofino [41]

Answer:

A box of donuts would cost: b = 3.84 + 0.18f

First, we have to find the total cost of the donuts.

12 x 0.32 = 3.84

Next, we need to determine the cost of the box. However, we don't know the surface area, just the cost per foot. We can multiply the number of square feet of the box by $0.18 to find the cost.

So our equation could be: b = 3.84 + 0.18f (where f is the surface area of the box in square feet)Explanation:

7 0

2 years ago

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NO LINKS!!!!!! Help its urgent, PLEASE HELP!!!!!!!!!!!!!!!!

Likurg_2 [28]

Answer:

I think ur answer would be B

Explanation:

srry if wrong

hope this helps

7 0

2 years ago

the average power of the Sun is 3.79x1026 Watts, answer the following questions: 13. What is the average intensity of light at E

Lemur [1.5K]

Explanation:

Given that,

Average power of sun $P=3.79\times10^{26}\ Watt$

We need to calculate the intensity of light at Earth's position

Using formula of intensity

$I=\dfrac{P_{avg}}{4\pi r^2}$

Where, I = intensity

P = power

Put the value into the formula

$I=\dfrac{3.79\times10^{26}}{4\pi\times(1.496\times10^{11})^2}$

$I=1347.616\ W/m^2$

So, The intensity is 1347.616 W/m².

(A). We need to calculate the pressure on a solar sail due to the light of the sun if it's fully reflective

Using formula for fully reflective

$P = \dfrac{2I}{c}$

Put the value into the formula

$P=\dfrac{2\times1347.616}{3\times10^{8}}$

$P=8.984\times10^{-6}\ N/m$

(B). We need to calculate the pressure on a solar sail due to the light of the sun if it's fully reflective

Using formula for fully absorptive

$P=\dfrac{I}{c}$

$P=\dfrac{1347.616}{3\times10^{8}}$

$P=4.492\times10^{-6}\ N/m$

Hence, This is the required solution.

6 0

2 years ago

When did diesel locomotives replace steam locomotives?

liubo4ka [24]

To keep the energy going every day

7 0

3 years ago

HELPPPPPP PLEASEEEEEEE-

Alex787 [66]

Answer:

One piece has a north pole only, and the other piece has à soutn pole only.

Explanation:

mark me brainliest!!

8 0

2 years ago

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