If    find the units of a, b and c. when( x) in  m  and (t) in  sec.

If x(t) is measured in meters (m) and t is measured in seconds (s), then we must have such that the units remain consistent:

For this to happen, we need s to cancel in the first term and produce a length in m; for this, we would get a in m/s.

In the second term, s^2 needs to be canceled, so b has unit m/s^2.

In the third term, s^3, so c has unit m/s^3.

  the unit of the measure =

explanation:

  the property that is quantified by the energy needed per of material to raise the temperature by one.

  si unit of energy = joule (j)

  si unit of temperature = kelvin (k)

  si unit of mass of material = kilogram (kg)

the property that is quantified by the energy needed per of material to raise the temperature by one is called specific heat.

the unit of specific heat is

when two balls of the different masses are dropped from equal height, they reach the ground at the same time .this is because they experience the same acceleration.

the acceleration is independent of mass.

thus when they are dropped they will always maintain the same velocity and travel the same distance (neglect air resistance of course) at the same time.