Answer:
5.1 m/s
Explanation:
The figure is missing: find it in attachment.
In order to find the average speed, we have to calculate the length of the total path, and divide it by the total time elapsed.
The curve from A to B is a quarter of a circle with a radius of r = 20 m, so its length is:
The path BC is the hypothenuse of a right triangle with sides equal to 20 m and 30 m, so its length is
Finally, the length of the path AC is the sum of the side of 30 m and the radius of the curve, so
So the total distance covered is
The total time elapsed is
So, the average speed is
A boiling pot of water (the water travels in a current throughout the pot), a hot air balloon (hot air rises, making the balloon rise) , and cup of a steaming, hot liquid (hot air rises, creating steam) are all situations where convection occurs.
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Inertia is the property of all matter by which it tends to remain
in constant, uniform motion unless acted on by external force.
Answer:
Helium will have the highest average speed
Explanation:
the kinetic molecular theory tells us that the temperature of a gas is directly proportional to the average kinetic energy of the gas. So since all three gases have the same temperature, they must have the same kinetic energy. Kinetic energy is KE = 0.5mv². How then can a gas with such a small molar mass like helium have the same kinetic energy as much heavier gases like oxygen and sulphur dioxide? By having a much larger average speed
