Answer:
Option D
2 m/s East
Explanation:
From the law of conservation of momentum, the sum of initial momentum equals the sum of final momentum
Momentum, p=mv where m is the mass and v is the velocity
Since the masses are the same then
Therefore
where and are final velocities of objects while and are the initial velocities respectively
Taking East direction as positive then West as negative and by substitution
Therefore
hence East since it's positive
Definition of luminosity is the total amount of energy emitted by the star per unit of time. We can use following formula to calculate the luminosity:
Where A is the surface area of the star.
We also have a very important mass-luminosity relationship:
This formula gives us relationship between stars mass and it's luminosity.
stands for Sun's luminosity and mass.
We can rewrite the luminosity formula like this:
Now if we divide this by the Sun's luminosity we get:
We can use this formula to estimate the mass. Surface temperature of the Sun is <span>5778 K.
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The answer would be 2 solar masses.
Answer is Weaker. If it is talking about the objects' gravitational forces.
Answer:
The correct option is:
B) Kinetic Energy
Explanation:
We know that if a body is placed at a certain height, it possesses Potential Energy, which is represented by 'mgh'. In this case, when the skydiver is present in the plane, before jumping, he has potential energy as he is at height 'h'.
As Kinetic energy is given as '(1/2)mv²' dependent on velocity of the object, when the skydiver jumps of the plane, his height starts decreasing, which decreases his Potential Energy. As energy can neither be created or destroyed, but is converted to one form or another, all this Potential energy starts to convert into Kinetic energy. As Potential Energy decreases with distance, Kinetic energy increases. Hence, line B represents Kinetic Energy.