2 years ago

How would the amount of carbon dioxide in the atmosphere change if they were no plants?

1 answer:

8 0

<span>There would be significantly more CO2 in the atmosphere because plants take in CO2 during photosynthesis and fix the carbon into glucose.</span>

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A 2.36 kg block resting on a frictionless surface is attached to an ideal spring with spring constant k = 260 Nm . A force is ap

podryga [215]

Answer:

-2.63 Joules

2.63 Joules

Explanation:

$x_i$ = Initial compression = 5.89 cm

$x_f$ = Final compression = -15.4 cm

k = Spring constant = 260 Nm

Work done by a spring is given by

$W=\frac{1}{2}k(x_i^2-x_f^2)\\\Rightarrow W=\frac{1}{2}260\times (0.0589^2-0.154^2)\\\Rightarrow W=-2.63\ J$

Work done by the spring is -2.63 Joules.

Change in kinetic energy is given by

$\Delta K=W_a+W_s$

Here, it is assumed that change in kinetic energy is zero as velocity and amlitude are not mentioned.

So,

$0=W_a+W_s\\\Rightarrow W_a=-W_s\\\Rightarrow W_a=--2.63\\\Rightarrow W_a=2.63\ J$

The work done by the applied force is 2.63 Joules.

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2 years ago

The energy difference in these two conformations has been measured to be about 23 kj per mole. how much of this energy differenc

Phantasy [73]

Answer:

The answer is 7.8 kJ / mol.

Explanation:

Energy = (number of methyl group) (Gauche interactions)(3.8kJ/mol per interaction)

= (2)(2)(3.8 kJ / mol)

= 15.2 kJ / mol.

The energy = (number of methyl group) - ( energy of gauche interactions)

= (23 kJ/mol) - 15.2 kJ/mol

= 7.8 kJ / mol.

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3 years ago

How can a parked car move?

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Add force to unbalance the forces

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What is the direction of the sum of these two vectors?

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Answer:

what is the direction of the sum of these two vectors?

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What is a sloping surface, like a ramp, that reduces the amount of force required to do work.

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If this is about simple machines the answer is: Inclined plane

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3 years ago