B.) Venus and Uranus
All of the planets move in an eastward direction except Venus and Urunus
Explanation:
Power = Energy / Time
When the velocity doubles the kinetic energy increases by a factor of 4.
So if the time is constant and the velocity doubles, then the power will increase to a factor of 4.
Answer:
Part(a): The value of the spring constant is .
Part(b): The work done by the variable force that stretches the collagen is .
Explanation:
Part(a):
If '' be the force constant and if due the application of a force '' on the collagen '' be it's increase in length, then from Hook's law
Also, Young's modulus of a material is given by
where '' is the area of the material and '' is the length.
Comparing equation () and () we can write
Here, we have to consider only the circular surface of the collagen as force is applied only perpendicular to this surface.
Substituting the given values in equation (), we have
Part(b):
We know the amount of work done () on the collagen is stored as a potential energy () within it. Now, the amount of work done by the variable force that stretches the collagen can be written as
Substituting all the values, we can write
Answer:
- 1.42m/s²
Explanation:
Acceleration is defined as the change in velocity of a body with respect to time.
Acceleration = change in velocity/time
Change in velocity = final velocity - initial velocity
Acceleration = final velocity - initial velocity/time
Since she slows her car from 14.0 to 5.5m/s in 6seconds,
Initial velocity = 14m/s
Final velocity = 5.5m/s
Time = 6seconds
Substituting in the given formula, we will have
Acceleration = 5.5 - 14/6
Acceleration = - 8.5/6
Acceleration = - 1.42m/s²
The negative acceleration shows that the car decelerates.
Scientists review the work of other scientists to validate the results and check the evidence's reliability. The correct option among all the options that are given in the question is the fourth option or the last option or option "D". I hope that this is the answer that has come to your desired help.