Answer:
The voltage across the capacitor decreases by a factor of 2.
Explanation:
As we know that capacitor is initially charges by battery connected across it
so we have
now capacitor is disconnected
so charge on the capacitor is conserved
Now a dielectric is inserted between the plates of the capacitor
So we will have
now the new voltage across the plates of capacitor is given as
so voltage between the plates of capacitor is decreased by factor of "k"
Answer:
Correct answer is option C (Brahe and Kepler.)
Explanation:
Copernican model
Copernican model is also known as heliocentric model. According to Copernican model planets rotate around the Sun in an orbit, and earth is orbited by the Moon. Also sun is stationary and it lies at the center of the universe and stars also do not move.
Brahe supported the Copernican model but he rejected the idea that earth moves.
Kepler's also supported Copernican model and In his book "the Mysterium Cosmographicum" Kepler appreciated Copernican model. like Kepler also believed in heliocentric model not in geocentric one.
The force necessary to gain the velocity is 40 N.
The velocity gained by the object at the end of the second minute is 30 m/s.
<h3>Force of the object</h3>
F = mv/t
where;
- m is mass of the object = 200 kg
- v is velocity of the object = 60 m/s
- t is time of motion = 5 mins = 300 seconds
F = (200 x 60)/(300)
F = 40 N
<h3>Velocity of the object</h3>
F = mv/t
Ft = mv
v = Ft/m
where;
- m is mass = 600 kg
- F is force = 150 N
- t is time = 2 mins = 120 s
v = (150 x 120)/(600)
v = 30 m/s
Thus, the force necessary to gain the velocity is 40 N.
The velocity gained by the object at the end of the second minute is 30 m/s.
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The electric force between two charged particles can be increased by decreasing the distance between the two particles.
<h3>How to increase electric force between two charged particles.</h3>
The technique of decreasing the separation distance between objects increases the force of attraction or repulsion between the objects. while
increasing the separation distance between objects decreases the force of attraction or repulsion between the objects.
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