in a nuclear plant, 1 * 10 ^27 J of energy is available from mass conversion How much mass was lost ?

Explanation:

Given that,

The energy of the nuclear plant,

We need to find how much mass wast lost.

The relation between energy and mass is given by :

Where

c is speed of light

So, of mass was lost.

air exerts forces on falling objects near earth’s surface.

explanation:

the term 'free falls' refer to object that are falling towards the earth, in a situation in which gravity is the only force acting on the object.

for an object in free fall, the acceleration is constant (g, the gravitational acceleration), and so the velocity of the object constantly increases.

for objects near earth's surface, there is always another force acting on the object: the resistance due to the air. this force is opposed to the direction of fall of the object, and it is proportional to the velocity of the object, so as the object falls down, this force increases up to a point when it balances the force of gravity, and the object continues its motion at constant velocity (called terminal velocity). since in this case gravity is not the only force acting on the object, we are not in a situation of free fall.

according to jean piaget, in what stage of cognitive development are children able to understand conservation task?

b. preoperational

just took it