Explanation:
The high hardness of quartz, seven on the Mohs Scale, makes it harder than most other natural substances. As such it is an excellent abrasive material. Quartz sands and finely ground silica sand are used for sand blasting, scouring cleansers, grinding media, and grit for sanding and sawing
Hello! Gravity is lost when you reach the outside of the Earth's orbit! So you would have to overcome gravity in order to officially be in space. Gravity is the first thing a rocket must overcome to reach space.
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Well, one is more effeciant than the other. I think it would run on less gass.
Answer:
The centripetal acceleration of the runner is 2.48 m/s²
Explanation:
Given :
Distance covered by runner, d = 200 m
Time taken by runner to complete 200 m , t = 23.2 s
Radius of the circular arc, r = 30 m
Consider v be the constant speed of the runner.
The constant speed is determine by the relation:


v = 8.62 m/s
Consider
be the centripetal acceleration.
The relation to determine centripetal acceleration is:


