A 30 kg boy stands on rough horizontal ground. The coefficient of static friction,
us is 0.8. The present static friction between the boy and the ground is
?

Complete the statement about memory improvement. ( )involves organizing and breaking down information into easier groups to expand capacity. rehearsal is the verbal repetition of information. these techniques are especially important for the improvement of ( ) memory.

The necleus of an atom is made up of what subatomic particles?

Write a full page that sumerizes thermodynamics it’s from the website visionlearnig