Answer:
75 miles an hour
I hope this is correct and helps
The earth is made up of layers (crust, mantle, outer core, and inner core). Each one has a unique make-up to it. This is the outer layer of the Earth about 10 miles or so thick. Mostly made up of rock and loose material
30N of force is unaccounted for. Since friction is known for taking energy from a system, you can guess that the missing 30N is caused by friction. 80-50=30
Answer:
197 hits/s
Explanation:
If the record is turning at the rate of 33 rev/min that means it's turning

If the groove is being played at radius of 10 cm (or 0.1m), that means the record is rotating with the speed of:

The goove bumps is uniformly separated at 1.75 mm(or 0.00175m/bump) bumps. So the number of hits per second it should be
