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How do you clean a coin without damaging it?
IF your coin is a common-date coin, pour some baking powder into a bowl put your coins in it then add some quantity of water.......... after 15 mins your coins will look shiny and newBUT NEVER, EVER DO THIS WITH A VALUABLE COIN!!! Cleaning will affect the surface and accelerate any deterioration that already exists.
When you drop a 5 rupee coin and a 2 rupee coin from 100 metres tall building at the same time which one will reach the earth quicker?
If you neglect air resistance, they'll hit the ground at the same time. This is a classic experiment proving that the force of gravity acts the same way on all objects. On the earth objects fall at an acceleration of 9.8 m/sec/sec, meaning their velocity increases 9.8 m/sec for every second they're falling. The same experiment has been done by people ranging from Galileo to American astronauts on the Moon. In reality, air resistance will have an effect on the speed and acceleration at which objects fall. All objects experience friction / resistance from air molecules, so anything that meets more resistance will fall more slowly. That's why a parachute lets a person fall more slowly than if they just dropped - its large surface area increases air friction. However, for similarly-sized items air resistance can be ignored because it will affect both the same way. A 5 rupee coin is larger than a 2 rupee coin so it may be slowed just a bit more. But if you did the same experiment in a vacuum the 2 coins would reach the ground at the same time.
How long does it take a coin to rust in salt water?
It depends on what metals the coin is made from!
Tools and materials of making frottage?
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How do you know if your 1941 dime is not a proof?
Proof coins were struck at Philadelphia up till 1964 so if your dime has an S or D mint mark next to the E in ONE, that's one indication it can't be a proof coin.If it doesn't have a mint mark, the only way to be 100% sure it's a proof coin would be if it's still in its original package from the Philadelphia Mint. If you found it in circulation a proof coin might still show its mirror-like surface in spite of being worn. The bad news is that once a proof coin has been damaged by being in change, in most cases it loses any special collector value.
How many forces are acting on the coin after your finger stops pushing?
After your finger stops pushing, there are two forces acting on the coin: gravity pulling it downward and the force of the table or surface pushing upward to support the coin and prevent it from falling.
How many forces are acting on a coin after your finger stops pushing down on it?
3 forces gravity drag lift
Why wet coin not slide when it is put on ramp?
A wet coin does not slide easily on a ramp because the water creates a layer between the coin and the surface, reducing friction. This layer of water prevents the coin from making direct contact with the ramp, which in turn reduces the friction force that allows the coin to slide.
what happens when you slowly pulled the cardboard?
When I slowly pulled the cardboard, the coin placed on top of the cardboard remained at rest but was dragged along with cardboard. Explanation: That is because, the coin was dragged by the force in the surface of the cardboard called friction.
What happene when you pulling the cardboard?
When I slowly pulled the cardboard, the coin placed on top of the cardboard remained at rest but was dragged along with cardboard. Explanation: That is because, the coin was dragged by the force in the surface of the cardboard called friction.
What is the name of the force that slows a spinning coin down?
The force that slows a spinning coin down is called friction. As the coin spins, it interacts with the air or any surface it comes in contact with, causing it to gradually lose its rotational energy and slow down.
Why did the coin rolling the floor slow down?
The rolling coin likely slowed down due to friction between the coin and the floor surface, which creates resistance against its motion. As the coin rolls, the frictional force eventually dissipates its kinetic energy, causing it to slow down and eventually come to a stop.
If you flick a coin it starts to move across a table Why does it slow down and stop after some time?
because of air and mechanical friction which slows the coin eventually defeating the coins inertial force.
Is it possible to convert the brass penny back to copper again?
By "the" penny, I'm assuming that you mean a penny that has been treated with zinc and sodium hydroxide, and then heated over a flame. To remove the brass plating, you can create friction on the surface of the coin that wears it away, reverting it back to its original copper color.
You toss a coin into a wishing well full of a liquid denser than the coin. will the coin sink?
no, it will float on the surface
How fast does a penny nickel the board go?
The speed at which a penny or nickel moves when it is pushed along a surface will vary depending on the force applied and the friction between the coin and the board. In general, the speed will not be very high given the small size and weight of the coin.
When you get water how do you make it stay on a one pence coin?
To make water stay on a one pence coin, you can carefully place a drop of water on its surface using a dropper or the tip of your finger. The surface tension of the water helps it hold together and stay on the coin. Additionally, tilting the coin slightly can help create a dome shape that allows the water to remain without spilling over.
