A fuel cell combines hydrogen and oxygen to produce electricity, heat, and water. Fuel cells are often compared to batteries. Both convert the energy produced by a chemical reaction into usable electric power.
Answer:
increase by 8 percent
Explanation:
<em>Price elasticity of supply of a product is the degree of responsiveness of supply of that product to a change in price.</em> Simply put:
Price Elasticity of supply = change in quantity supply/ change in price.
In this case, price elasticity of supply of gasoline = 0.4
Percentage price increase = 20 percent.
Hence,
0.4 = change in supply/20
Change in supply = 20 x 0.4 = 8 percent
<em>Therefore, the quantity supply of gasoline will increase by 8 percent</em>
Answer:
28.3 m/s
Explanation:
From the question given above, the following data were obtained:
Angle of projection (θ) = 30°
Maximum height (H) = 10 m
Acceleration due to gravity (g) = 10 m/s²
Initial velocity (u) =?
Thus, we can obtain the minimum velocity cannon ball by using the following formula:
H = u²Sine² θ / 2g
10 = u² × (Sine 30)² / 2× 10
10 = u² × (0.5)² / 20
10 = u² × 0.25 / 20
10 = u² × 0.0125
Divide both side by 0.0125
u² = 10/ 0.0125
u² = 800
Take the square root of both side
u = √800
u = 28.3 m/s
Therefore, the minimum speed of the cannon ball is 28.3 m/s
C. National Park Planning
Biodiversity - <span>the variety of life in the world or in a particular habitat or ecosystem.
Clear cutting and oil drilling both decrease the variety of life, destroying habitat around them.
Farming decreases biodiversity because it decrease the variety of flora in that area, depending on what crop is planted.</span>
This one is a piece 'o cake if you know the definition
of a horsepower, and impossible if you don't.
It is: 1 horsepower = 746 watts
Also, remember that 1 watt = 1 joule/second
Now: Work = (force) x (distance)
To move this box 2 meters,
Work = (1,492 newtons) x (2 meters) = 2,984 joules
If you accomplished that feat in 1 second,
then you produced power of
(2,984 / 1) (joule/second) = 2,984 watts .
(2,984 watt) x (1 HP / 746 watt) = 4 horsepower .
That's the solution, applying bullet-proof math and physics to the
given data. But in the real world, I guarantee that you didn't do that.
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By the way ... a comment regarding the terminology in the question:
The box doesn't "have a force" of 1,492 newtons. That's the force
with which you ... or a horse, or an ox ... pushed against the box
in order to move it.
(And, if I might observe, that force is about 336 pounds,
so my money would be on the horse or the ox.)
