What happens when a negatively charged object a is brought near a neutral object b?
a.
object b gets a negative charge.
b.
object b gets a positive charge.
c.
object b stays neutral but becomes polarized.
d.
object agets a positive charge.
e.
object a loses all its charge.
reset
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When you drop a pebble from height a it reaches the ground with speed v if there is no air resistance. from what height should you drop it so it will reach the ground with three times the speed? (a) 9m (b) 3m (c) 6m (d) 18m

The gun from the crime scene shows tool marks where the serial numbers are ground off. there are also tool marks on the bullets left behind. what information can the tool marks on the bullets and gun provide about the crime? what type of evidence does this information provide, individual or class?

2) why do satelites not fall while revolving around the earth?