How do you report a yes or no question?

Yes or no questions are reported with 'if' or 'whether'. Note that we cannot use the words say and tell to report questions. Study the examples given below.

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Why is the pendulum important?

It states that a body at rest, stays at rest and a body in motion stays in motion, unless acted on by an outside force. Pendulums provide proof of Newton's first law of motion. In respect to this, why does a pendulum come to a stop? The pendulum stops eventually because of air resistance. The pendulum loses energy because of friction. Only in a theoretical situation when there is no friction the pendulum will oscillate forever.

Then, what law of energy has never been broken?

The law of conservation of energy, also known as the first law of thermodynamics, states that the energy of a closed system must remain constant-it can neither increase nor decrease without interference from outside. Chemical energy is another form of potential energy stored in molecular chemical bonds. What is pendulum energy? An ideal pendulum system always contains a stable amount of mechanical energy, that is, the total of kinetic plus potential energy. As the pendulum swings back and forth, the balance between the two types of energy changes constantly. At some points in its swing, the pendulum has more kinetic energy.

Who invented the pendulum?

Such was the case with 17th century Dutch astronomer Christiaan Huygens. He became the first to report the phenomenon of coupled oscillation in two pendulum clocks (which he invented) in his bedroom while recovering from an illness in 1665. Then, how many pendulums are there? When all 15 pendulums are started together, they quickly fall out of sync-their relative phases continuously change because of their different periods of oscillation.

How long do Newton cradles last?

Each Newton's Cradle is hand finished with care and comes with a 12-month warranty. If you have followed the setup instructions to clean the balls before first use, then your Cradle is sure to last for three to five years. If any piece breaks we send replacement balls, strings and plug to you.