b) 8.2 X 10-8 m
c) 1.9 X 10-8 m
d) 5.3 X 10-8 m
Answer:
So option (d) will be correct option
Explanation:
We have given shear force F = 400 N
Size of the cube
Shear modulus of aluminium
We have to find the resulting relative displacement
Area of the cube
We know that shear force is given by
So
So option (d) will be correct option
Answer:
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Explanation:
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Answer:
b. Decreases
Explanation:
The total resistance of a series circuit is equal to the sum of the individual resistances:
(1)
Therefore, as we add more lamps, the total resistance increases (because we add more positive tems in the sum in eq.(1).
The current in a circuit is given by Ohm's law:
where V is the voltage provided by the power source and is the total resistance. We notice that the current, I, is inversely proportional to the total resistance: therefore, when more lamps are added to the series circuit, the total resistance increases, and therefore the current in the circuit decreases.
The change in velocity of a car that starts at rest and has a final velocity of 20 meters/second north would be 20 meters/second.
The rate of change of the velocity with respect to time is known as the acceleration of the object. Generally, the unit of acceleration is considered as meter/secondsĀ².
As given in the problem we have to find the change in velocity of a car that starts at rest and has a final velocity of 20m/s north,
the final velocity of the car = 20 meters/second north
Change in the velocity = final velocity - initial velocity
=20 - 0
= 20 meter/second
Thus, the change in the velocity would be 20 meters/second
Learn more about acceleration from here
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c. a yellow star
b. a main sequence star
d. of average absolute magnitude
Answer:
part of a binary system
Explanation:
Sun is a yellow star, it is a G-type main sequence star. It is yellow dwarf star. It is white but from our earth, it appears yellow. So it is a yellow star.
As mentioned, yes it is a main sequence star.
It is our main part of solar system so it appears to be huge for our earth, however it stands medium in the size among all other billions of stars in the universe.
Sun is solo star, It has no companion star associated with it (as with other stars which have one or more companion star with them making binary or tertiary etc system).