Aball rolls down a hill, starting from rest. how long is it rolling if it accelerates at 3m/s2 and ends with a velocity of 35m/s?

Answer

The answer to this question is

Explanation

As we know that accelartion is the rate of change of velocity. So, it can be write as

where

is the final velocity

is the initial velocity

t is the time

a is the accelartion

as we konw

t = ?

From rest So,

= 0

Putting values

So, the right answe is

An  atom  (ours, not carroll's) consists of a positively charged  nucleus, surrounded by one or more negatively charged particles called  electrons. the positive charges equal the negative charges, so the atom has no overall charge; it is electrically neutral. most of an atom's mass is in its nucleus; the mass of an electron is only 1/1836 the mass of the lightest nucleus, that of hydrogen. although the nucleus is heavy, it is quite small compared with the overall size of an atom. the radius of a typical atom is around 0.1 to 0.25 nanometres (nm), whereas the radius of a nucleus is about 10-6  nm.  *  if an atom were enlarged to the size of the earth, its nucleus would be only 200 feet in diameter and could easily rest inside a small football stadium.read more on -