Answer:
The __law__ conservation
of state that either energy may produced nor destroyed
In exothermic/exergonic reactions, reactants have greater energy(Gibbs-Free Energy) than the products. This energy determines how much mechanical work a system can do
Answer:

Explanation:
Given data
Coefficient of performance of a residential heat pump=1.6
Electrical power P=4kW
Required
Heat Q
Solution
The rate of heat produced is given as

Substitute the given values
So
Explanation :
It is given that, a heavy box is in the back of a truck and the truck is accelerating to the right.
The description is shown in<em> figure 1</em>. Here, the forces that act on both box and the truck are the normal force, the frictional force and their weight mg.
The free body diagram is shown in <em>figure 2</em>. This shows the total forces ( F = ma )acting on the truck. As a result, the truck will move in a forward direction.
Hence, this is the required explanation.
Answer:

Explanation:



Distance between q1 and q2,d=20 cm

1m =100 cm
Electric force on charge q3 due to charge q1
(away from q1)
Electric force on charge q3 due to charge q2
(attract toward q2)
Net force=


