By definition, the electric force is given by:

Where,
q1: electric charge of object number 1.
q2: electric charge of object number 2.
d: distance between both objects
k: proportionality constant
Therefore, the magnitude of the electric force is affected by:
1) The product of the charges of the objects
2) The distance between objects
Answer:
The factors that affect strength of the electric force between two objects are:
1) The product of the charges of the objects
2) The distance between objects
Answer:
Walking while alternating knee lifts with each step.
Standing up and sitting down from a chair without using your hands.
Standing with your weight on one leg and raising the other leg to the side or behind you.
Explanation:
Those are the ones that I could best come up with.
A radio wave is generated by a transmitter and then detected by a receiver. An antenna allows a radio transmitter to send energy into space and a receiver to pick up energy from space. Transmitters and receivers are typically designed to operate over a limited range of frequencies
Instantaneous impulse and continuous force: these are the foundations of Newton laws. In short explanation; concept of force and mass.
To solve this problem we need to apply doppler equation,
Our values are:

Doppler equation is given by,

Substituting,



Wavelenght is equal to,


We can now find the distance by,



b) We can find at what angles would sound first cancel through the same equation of wavelenght,


