Answer:
two 5kg objects 2 meters apart✨
Answer:
Check image.
Explanation:
This is what my solution is, not a professional tutor so take my answer with a grain of salt and check.
Answer:
The statement about atmospheric pressure that is false is <u><em>option d) With an increase in altitude, atmospheric pressure increases as well. </em></u>
Explanation:
Atmospheric pressure as the force exerted by atmospheric air on the earth's surface. The higher the height of the earth's surface with respect to sea level, which is the reference point, the lower the air pressure. In other words, atmospheric pressure decreases in altitude. This is because, the higher the height, the smaller the amount of air present for pressure. For example, on a mountain the amount of air in the highest part is less than that on a beach. This means that there is lower atmospheric pressure at the top.
Although it must be taken into account that the atmospheric pressure does not decrease proportionally in height, due to the high compressibility of the fluid (gas).
At sea level, which is the reference point, atmospheric pressure takes a value in different units of 1 atmosphere, 1013 millibars or 760 mm Hg.
So, <u><em>the statement about atmospheric pressure that is false is option d) With an increase in altitude, atmospheric pressure increases as well.</em></u> This is because, as mentioned, with an increase in altitude, the atmospheric pressure decreases.
Answer:
Time taken to reach its maximum height is 2.04 seconds.
Explanation:
It is given that, a tennis ball is shot vertically upward in an evacuated chamber inside a tower with an initial speed of 20.0 m/s at time t = 0 s.
At maximum height, its final velocity v = 0
Let t is the time taken by the tennis ball to reach its maximum height. We know that for a freely falling object, the value of acceleration is -g or -9.8 m/s².
Using first equation of motion as :
t = 2.04 seconds
Therefore, this is the required solution.
