centripetal acceleration is given by formula
given that
now we have
so the ratationa frequency is given by
Answer:
Opposite charge
Explanation:
The electric force between charged bodies at rest is conventionally called electrostatic force. Coulomb's law states the magnitude of electric force between two point charges is directly proportional to the product of the charges and inversely proportional to the square of the distance between the charges. According to Coulomb's law, if the two charges are q1 and q2 and the distance between the charges is ‘r’, the force ‘F’ of attraction or repulsion between them is, then,
F ∝ q₁q₂
and
F ∝ 1/ r²
Introducing constant of proportionality and combining the joint variation,
(Coulomb's law)
where k is 1/4πε₀ = 9 × 10⁹ Nm²/C²
Now let's apply Coulomb's law to solve the question.
Like charges attract while unlike charges repel. Since the two objects released from rest carry charges, the force between them is known as the electrostatic force. If the two objects released are assumed to be of equal quantity and of opposite charge, the two objects will attract thereby increasing the magnitude of the charges of the objects. When the magnitude of the charges increase, the electrostatic force of of the charges increase.
Answer:
a)
b)
c)
d)
Explanation:
Given:
- length of muscle fibers,
- maximum stress on each fiber,
- Volume of muscles,
<em>∴Area of the muscle:</em>
a)
Maximum force developed by this muscle:
b)
Force when the muscles are 10% activated:
c)
- contraction in length of muscle,
- time taken for the contraction,
<u>Now, the speed of the muscle:</u>
d)
<u>Maximum force delivered when the muscle fibers are oriented at 15° from the tendons:</u>
Answer:
Electromagnetic waves travel in a vacuum with a definite and unchanging speed.
When electromagnetic waves travel in vacuum, there is a definite, constant ratio between the magnitudes of the electric and magnetic fields.
Explanation:
Electromagnetic waves are waves that come about due to the vibrations generated between an electric field and a magnetic field. There is presence of oscillating magnetic and electric fields and the two statements mentioned above best describes it's properties.