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3 years ago

Which is more expensive to create coal or solar power

1 answer:

3 0

Solar power many be a bit pricey, but it is more efficient than coal and it is better for the environment, coal could be made easily and is cheaper, but Solar power is efficient.

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The gas sample has now returned to its original state of 1.00 atm, 20.0 ∘c, and 1.00 l. what will the pressure become if the tem

steposvetlana [31]

At a constant volume and number of moles of the gas the ratio of T and P is equal to some constant. At another set of condition, the constant is still the same. Calculations are as follows:

T1/P1 = T2/P2

P2 = T2 x P1 / T1

P2 = 473.15 x 1.00 / 293.15

P2 = 1.61 atm

3 0

3 years ago

Help please! Will give brainliest

zmey [24]

The answer is C
All other statements are correct but C

6 0

3 years ago

While filming an intense action sequence for the next James Bond movie, a controlled explosion detonates 1.1 km away from the ac

kolezko [41]

Answer:

The time that will pass between the feeling and hearing the explosion is 2,86 secs

Explanation:

First, let's calculate the time that the wave takes to travel until the actors feel the explosion:

$1,1 km*\frac{1.000 mts}{1 km} *\frac{sec}{3.000 mts} = 0,37 secs$

Now, the time that pass while the actors hear the sound is:

(Remember that the sound speed in the air is 340 m/s on average)

$1,1 km * \frac{1.000 mts}{1 km} * \frac{sec}{340 mts} = 3,23 secs$

So, the time between the feeling and hearing is 3,23 - 0,37 = 2,86 secs

4 0

3 years ago

You lift a 25-kg child 0.80 m, slowly carry him 10 m to the playroom, and finally set him back down 0.80 m onto the playroom flo

maksim [4K]

To solve this problem we will apply the work theorem which is expressed as the force applied to displace a body. Considering that body strength is equivalent to weight, we will make the following considerations

$\text{Mass of the child} = m = 25kg$

$\text{Acceleration due to gravity} = g = 9.81m/s^2$

$\text{Height lifted} = h = 0.80m (Upward)$

Work done to upward the object

$W = mgh$

$W = (25)(9.81)(0.8)$

$W = 196.2J$

Horizontal Force applied while carrying 10m,

$F = 0N$

$W = 0J$

Height descended in setting the child down

$h' = -0.8m (Downwoard)$

$W = mgh'$

$W = (25)(9.81)(-0.80)$

$W = -196.2J$

For full time, assuming that the total value of work is always expressed in terms of its symbol, it would be zero, since at first it performs the same work that is later complemented in a negative way.

6 0

3 years ago

In winter, earth's axis points toward the star polaris. in spring:

tatiyna

In spring also the axis point towards the star Polaris.
Polaris star is located on the celestial sphere, directly above the north pole of earth.
In the constellation of Ursa minor, it is the brightest star among others and also known as North star or Pole star as it is directly above the north pole of earth. Sometimes this star is also called as Stella Polaris.

8 0

3 years ago