Answer:
When two objects interact, each one exerts a force on the other that can cause energy to be transferred to or from the object. For example, when energy is transferred to an Earth-object system as an object is raised, the gravitational field energy of the system increases. This energy is released as the object falls; the mechanism of this release is the gravitational force. Likewise, two magnetic and electrically charged objects interacting at a distance exert forces on each other that can transfer energy between the interacting objects.
Explanation:
Even when an object is sitting still, it has energy stored inside that can be turned into kinetic energy (motion). ... A force is a push or pull that causes an object to move, change direction, change speed, or stop. Without a force, an object that is moving will continue to move and an object at rest will remain at rest.
Answer:
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Answer:
A. 20 N
Explanation:
the weight of book is 2×10= 20N
Each electron provides a charge of -1.602 × 10^-19 coulombs.
If there are 8.51 × 10^-6 extra electrons:
1 electron ____________ -1.602 × 10^-19 coulombs
8.51 × 10^6 electrons___x = -1.602 × 10^-19*8.51 × 10^6/1=-1.32×
10^-12 coulombs
So the extra electrons provide a charge of 1.32× 10^-12
coulombs.
So the net charge is -1.32× 10^-12 coulombs (there are more
electrons besides those extra electrons, but there are also protons, so they
don’t affect the net charge – the other electrons just compensate the charge of
the protons).
Answer:
Explanation:
The magnitude of the load and the cross sectional area of the wire
σ = F/A
higher loads and smaller areas result in greater stresses.
