Answer:
d) shortening the string
Explanation:
Time period of a pendulum clock is dependent on two factors namely:length and acceleration due to gravity.
When a clock loses time, the time period of the pendulum clock increases.
This however can be corrected by decreasing the length of the pendulum.The time period of the pendulum clock is not dependent on the mass of the bob. The time period of the pendulum clock can be corrected only by changing the length of the pendulum string.
Answer:
I believe that the answer is D. There are drilling platforms all along the coast that are used to drill for natural gas that can be used to generate electricity.
Explanation:
Solar panels use the sun, and that is renewable.
The power plant uses tides and waves, they are renewable.
Windmills use wind, that is renewable.
So, the answer is D.
Answer:
1 m/s
Explanation:
Impulse = Change in momentum
Force × Time = Mass(Final velocity) - Mass(Initial Velocity)
(1.0)(1.0) = (1.0)(Final Velocity) - (1.0)(0)
Final velocity = <u>1 m/s</u>
Answer:

Explanation:
First of all, let's remind that:
- The kinetic energy of an object is given by
, where m is the mass and v is the speed
- The momentum of an object is given by 
- The inertia of an object is proportional to its mass, so we can write
, where k just indicates a constant of proportionality
In this problem, we have:
-
(the two objects have same kinetic energy)
-
(A has three times the momentum of B)
Re-writing both equation we have:

If we divide first equation by second one we get

And if we substitute it into the first equation we get

So, B has 9 times more mass than A, and so B has 9 times more inertia than A, and their ratio is:
