Answer:
Explanation:
The gravitational force is given by Newton's Law of Gravity:
The electrostatic force is given by Coulomb's Law:
The ratio between these two forces is
Answer:
Explanation:
Given
COP= 60 % of carnot heat pump
For heat added directly to be as efficient as via heat pump
Answer:
20 Joules
Explanation:
Mechanical Energy is the sum of kinetic and potential energy.
Since energy can only be transferred and cannot be lost, kinetic energy=potential energy.
Now we only need to use one of the formulas to find the answer. In this answer I'll be using the formula for potential energy which is mass × gravitational field strength ×height.
Substitute the values in and using gfs=10, the answer will be 20J.
Answer:
33= 0+10 * t so t = 33 / 10 = 3.3 hrs