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How many years would it take half of the rubidium-87 atoms in piece of rock to change into strontium-87?
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Does the area of a piece of paper change if you change the height and radius?
Yes.
Is molding a piece of silver a physical change?
Molding a piece of silver using heat is a physical change. This is because it is changing shape and not chemically changing the silver.
When you use a hammer to drive a nail into a piece of wood are you changing the size or the direction of the force?
change the direction of force,because it exerted the force on it.
What is the mass of a piece of copper that undergoes a 25 degrees C temp change with the loss of 428 J of energy?
q = mass * specific heat * change in temperature 428 joules = (mass)(0.385 J/gC)(25o C) = 44 grams copper ============
What does capo 4 mean?
its an object your put on a guitar to change the tuning. for example if someone says "to play this piece you need capo 4". search "capo" on google for more info
Why is magnitizing a piece of steel a physical change?
Cause you're changing the direction of the atoms when you magnetize it.
Are the atoms in a piece of iron different from the atoms in a piece of tin?
Yes. Their atomic mass is different, among other things.
How many dozens of silver atoms are in a piece of jewelry?
The number of silver atoms in a piece of jewelry would depend on the size and weight of the jewelry. A typical piece of silver jewelry may contain millions to billions of silver atoms.
What is the smallest piece of matter discovered?
Atoms
What happens during physical changes?
The transformation of a liquid to a gas.
Is folding a piece of paper a chemical change?
no it is not a physical change because folding a piece of paper does not chemicaly change it.
Is wadding a sheet of paper a chemical change?
Physical change. The paper is still a piece of paper; nothing happened to the chemical composition of it.
tearing a piece of paper in half physical or chemical change?
Physical change
How the arrangement of the atoms and molecules in a sugar crystal differ from those in a piece of plastic?
the atoms dissolve with the atoms and the molecules to lock the sugar and salt / lock in to make the crystals
Difference between a physical change and a chemical change?
A chemical change is the change of one or more substances into other substances. A physical change is when the state or shape of matter is changed. In a chemical change molecules are combined or beak apart to form new substances.Rusting iron is an example of a chemical change. crushing a can or tearing paper can be an example of physical change.
When a piece of metal cools it will do what?
When a piece of metal cools, it will contract or shrink in size. This happens because the atoms in the metal lose kinetic energy and move closer together, leading to a decrease in volume. Cooling can also change the metal's properties, such as making it harder or more brittle.
When a piece of paper burns is physical change or chemical change?
Cheimical change
