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3 years ago

Photosynthesis and respiration are best described as

Physics

2 answers:

Olin [163]3 years ago

7 0

The answer is 3. Photosynthesis removes carbon dioxide while respiration puts back carbon dioxide

irinina [24]3 years ago

6 0

The right answer is 3- bcz respiration needs oxygen but photosynthesis wants co2

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Imagine you use Nitrogen as your gas. If you have the cold side as cold as you can without liquefying it (78 K), and run the hot

alina1380 [7]

Answer:

The efficiency of a Stirling engine is 74%

Explanation:

Given:

Temperature of gas when it is cold $T_{1} = 78$ K

Temperature of gas when it is hot $T_{2} = 300$ K

The efficiency of a stirling engine,

$\eta =1 - \frac{T_{1} }{T_{2} }$

$\eta = 1- \frac{78}{300}$

$\eta = 1-0.26$

$\eta = 0.74$

∴ $\eta = 74 \%$

Therefore, the efficiency of a Stirling engine is 74%

5 0

3 years ago

Five loops are formed of copper wire of the same gauge (cross-sectional area). Loops 1-4 are identical; Loop 5 has the same heig

nata0808 [166]

The answer to this question is A

3 0

3 years ago

The apparent westward movement of a planet against the background of stars is called

Lubov Fominskaja [6]

Answer:

Retrogade Motion

Explanation:

The planet movement is called a retrogade motion meaning that it is moving in an opposite path to the stars.

6 0

3 years ago

A 2 kg ball is moving 3 m/s when it starts rolling up a hill.

AURORKA [14]

Answer:

the height reached is = 0.458 [m]

Explanation:

We need to make a sketch of the ball and see the location of the reference point where the potential energy is zero. But the kinetic energy will be defined by the following expression:

$Ek=\frac{1}{2} *m*v^{2} \\where:Ek= kinetic energy [J]\\m = mass of the ball [kg]\\v = velocity of the ball [m/s]$

Replacing the values on the equation we have:

$Ek=\frac{1}{2}*(2)*(3^{2} )\\ Ek=9[J]\\$

This kinetic energy will be transformed in potential energy in the moment when the ball starts to rolling up. Therefore the maximum height reached by the ball depends of the initial velocity given to the ball.

$Ek=Ep\\where\\Ep=potential energy [J]\\Ep=m*g*h\\where\\g=gravity = 9.81[m/s^2]\\h=height reached [m]\\$

Now we have:

$h=\frac{Ep}{m*g} \\h=\frac{9}{2*9.81} \\\\h=0.45 [m]$

In that moment when the ball reach the 0.45 [m] the potencial energy will be maximum and equal to the kinetic energy when the ball has a velocity of 3[m/s]

6 0

3 years ago

Which of these statements is correct about forces in the solar system?

juin [17]

The right answer for the question that is being asked and shown above is that: "B) The magnitude of gravitational forces is greater than the magnitude of electromagnetic forces." The statement that is correct about forces in the solar system is that <span>B) The magnitude of gravitational forces is greater than the magnitude of electromagnetic forces. </span>

7 0

4 years ago

Read 2 more answers