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2 years ago

12

Emeka carried out a reaction in which a gas was given off. He followed the progress of the reaction by measuring the mass of the

reaction vessel over time. After 5 minutes the mass of the reaction vessel had decreased from 120g to 114.5g. Calculate the rate of this reaction.

1 answer:

pickupchik [31]2 years ago

6 0

Answer:

17.5

or

1.1 g/min

I know it's one of these, try getting a second opinion

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When the distance between two interacting objects doubles, the gravitational force is

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The gravitational force will be one quarter.

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F=GMm/r^2

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Thus the gravitational force is inversely proportional to the square of the distance between the objects, Therefore if the distance between two objects is doubled the force will be one quarter.

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3 years ago

When a student stands on a rotating table,the frictional force exerted on the student by the table is?

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Less

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Suppose your walking speed is 2m/s in a period of 1 s . What is your acceleration?

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Answer:

<h2>2 m/s²</h2>

Explanation:

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From the question we have

$a = \frac{2}{1} \\$

We have the final answer as

<h3>2 m/s²</h3>

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3 years ago

Consider a satellite in a circular orbit around the Earth. If it were at an altitude equal to twice the radius of the Earth, 2RE

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Answer:

$v=\sqrt{\frac{gR_E}{2}}$

Explanation:

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$a=\frac{GM}{r^2}$

If we are on the surface of the Earth, the acceleration would be g and $r=R_E$ (Earth's radius):

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$v^2=\frac{gR_E^2}{r}$

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$v=\sqrt{\frac{gR_E^2}{2R_E}}=\sqrt{\frac{gR_E}{2}}$

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