Answer:
(a) The force between them quadruples
Explanation:
According to coulomb's law, initial force between the two charged objects is given as;
where;
k is coulomb's constant
q₁ is the charge on the first object
q₂ is the charge on the second object
r is the distance between the two objects
When the charges on both objects are doubled, then;
q₁ = 2q₁
q₂ = 2q₂
Force between the two charged objects will become
Therefore, the force between them quadruples
If the two forces act in the same direction, their resultant is 13N .
If they act in opposite directions, their resultant is 3N .
These are the limits. The resultant is always between 3N and 13N.
So (B), (C), and (D) (3N, 10N, and 13N are possible.)
<em>(A)</em> 2N is not possible.
Answer: opening of the nicotinic acetylcholine receptor channels.
Explanation:
Neuromuscular junction is a special junction formed between a motor neurone and a muscle fibre. The junction is fortified with nerves and receptors that helps in the transmission of signals from the motor neurone to the muscle fibre in order to bring about the desired voluntary movements through muscular contraction.
Nicotinic acetylcholine receptor are activated through the binding of acetylcholine at the neuromuscular junction. This action leads to influx of sodium ions to accomplish endplate potential.
Answer:
Explanation:
a) the speed=
V=√2gr²/2r
=√gr/2
√10*637/2
V=31850m/s²
Magnitude of the acceleration
a=Gm/r²
10*238/(6370)²
2380/12740
=0.187
