What are you asking? And more info needs to be provided.
Answer:
Sliding friction is the force that sliding objects experience
Explanation:
The instrument is a Geiger counter and is used to measure radioactive level around people's bodies.
I can not solve the problem if I do not have the mass.
Answer:
it is reduced four times.
Explanation:
By definition, the electric field is the force per unit charge created by a charge distribution.
If the charge creating the field is a point charge, the force exerted by it on a test charge, must obey Coulomb´s Law, so, it must be inversely proportional to the square of the distance between the charges.
So, if the distance increases twice, as the force is inversely proportional to the square of the distance, and the square of 2 is 4, this means that the magnitude of the force exerted on the test charge must be 4 times smaller.
