3 years ago

What does a plant such as grass need to grow?

Physics

1 answer:

AfilCa [17]3 years ago

3 0

Answer: it needs to function using energy from sunlight, carbon dioxide from the air and water from the soil.

Explanation:

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An element's atomic number is 77. How many protons would an atom of this element have? protons

bulgar [2K]

Your answer is 55 protons.

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2 years ago

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When the displacement of a mass on a spring is 1/2a the half of the amplitude, what fraction of the mechanical energy is kinetic

USPshnik [31]

Total energy is a spring:
$E = \frac{1}{2} kx^2 + \frac{1}{2} mv^2 = \frac{1}{2} ka^2$

At x = 0.5a:
$\frac{1}{2} k \frac{a}{2} ^2 + \frac{1}{2} mv^2 = \frac{1}{2} ka^2 \\ \frac{1}{2} mv^2 = \frac{1}{2} ka^2 - \frac{1}{8} ka^2 = \frac{3}{8} ka^2$

The ration:
$\frac{ \frac{3}{8}ka^2 }{ \frac{1}{2} ka^2} = \frac{3}{4}$

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3 years ago

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A process generates 250 watts of useful energy and 600 watts of waste energy. WhT is the efficiency of the process?

Cloud [144]

The efficiency of the process is 42%

From the question given above, the following data were obtained:

Useful energy = 250 watt

Wasteful energy = 600 watt

<h3>Efficiency =? </h3>

The efficiency of the process can be obtained as illustrated below:

$efficiency \: = \frac{useful \: energy}{wasteful \: energy} \times 100 \\ \\ efficiency \: = \frac{250}{600} \times 100 \\$