i need to to plan an investigation to answer the the following question....which material is best at keeping a beaker of water hot: foil, paper or foam

Answers

Answer 1

Answer: Foil would be the best option. Paper does not insulate and is very thing, while foam is better at retaining cold than heat. The foil with heat up with the water and give energy back to the system.

Answer 2

Answer:
-- Get three beakers, all with identical shape and size.

-- Get a lab thermometer if possible ... the kind that's made of
glass and is like a foot long. If you can get 2 or 3 of them to
work with, that would be even better.
If you do get to use more than 1 thermometer, then whatever kind
they are, they should all be the same thing.

-- Get a timer or a clock that's easy to read.

-- Get a fresh pad of paper and a few pens.

-- Draw three long columns from the top of the paper to the bottom.
At the top of one column, write "Foil". At the top of another column,
write "Paper, and at the top of the third column, write "Foam".

-- On the lines down one side of the paper, write "0", "10", "20, "30",
"40", "50", ... and keep going all the way to, I'd say", at least "150".

Now you're ready to investigate.
======================================

-- Wrap one beaker with foil, one with paper, and the third one
with foam. Put a rubber band or a strip of tape around each one
to keep the wrapping in place.
This is not easy. In order to get any meaningful conclusion from your
investigation, all three wraps should have the same thickness !
Any material that's 6 inches thick will certainly be a better insulator
than any other material that's only as thick as a sheet of paper.
You want the results of your investigation to be caused only by
the kind of material ...NOT by how thick it is.

-- Set up your beakers in a place where they can stay for a few hours,
and with some space between them. It should be a place where there's
not too much wind, and where the temperature in the room won't make
any sudden changes.

-- Boil a teapot of water. When the water boils, quickly pour the same
amount of water into all 3 beakers, and start the timer or the clock.

-- Take the temperature of the water in each beaker, and write it down
on the top line of your paper ... the one labeled " 0 " .
Do this very carefully. Don't move the beakers. Don't take anything out
of them, and don't put anything into them except the thermometer.
If you were able to find three lab thermometers to use, then leave one in each
beaker, and just read them. You don't need to move or touch anything
as long as your investigation lasts.

-- Take the temperature of the water in each beaker every 10 minutes.
Write each one down on the paper, in the space under the proper wrap
material for that beaker, and on the line for the proper time of the reading.

-- Keep reading and writing every 10 minutes.
If your paper is numbered up to "150", then it'll take you 2 and 1/2 hours,
and you'll have lots of delicious numbers to play with.

When you're done, before you take the data into your office to analyze it,
unwrap the beakers and clean and dry them. Also, any other equipment
that you borrowed for your investigation, clean it and return it to whoever
lent it to you. Say "Thank you" and give them a piece of chocolate.

Now, you can draw beautiful graphs with your numbers. The graph will
have three lines on it ... one for each material. The lines will all start out
at the same point, and then one will drop fast, one will drop slow, and one
will drop in between the other two. I don't know which one will drop the
slowest That's the whole point of your investigation. The slowest one
is the winner ... it's the best insulator, no matter whether you're trying
to keep something hot OR cold.

One thing that might surprise you when you graph your numbers . . . the
lines of temperature are NOT straight. The lower each temperature gets,
the slower it cools more. Each line begins dropping fast, but drops slower
and slower as time goes on, and heads for a smooth landing at the bottom
as it approaches the temperature in the room.

You're welcome, and good luck.
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Which type of thunderstorm forms in a narrow band that's about 10 to 20 miles wide? A. Single-cell thunderstorm

B. Multi-cell line

C. Multi-cell cluster

D. Supercell

Answers

Answer:

B. Multi-cell line

Explanation:

A multi-cell line, or how it is more commonly known, a squall line, is basically a group of storms forming a line, like a bow, they have been seen to cover hundreds of miles long but usually only 10 or 20 miles wide.

It is theorized that this is because when a cyclone is formed, there are two forces of "wind" one ahead and one behind, concentrating air masses as if the winds were "squishing" them to form a line.

Answer: Multi-cell Line

Explanation:

Multi-cell line storms form in a long, narrow line. While multi-cell lines may be just 10 to 20 miles wide, they can be hundreds of miles long. Multi-cell lines are known as "squall lines."

Which statements best describe energy? Check all that apply. The total amount of energy in the universe remains constant. The total amount of energy in the universe changes constantly. Energy cannot be converted from one form to another. Energy can be converted from one form to another. Energy cannot be created or destroyed. Energy can be created or destroyed.

Answers

1) The total amount of energy in the universe remains constant.

4) Energy can be converted from one form to another.

5) Energy cannot be created or destroyed.

Best describes energy

What is law of conservation of energy ?

Law of conservation of energy is the principle of physics according to which the energy of interacting bodies or particles in a closed system remains constant.

Total energy of any system always remains constant . Also from law of conservation of energy it can be stated as energy can neither be created nor be destroyed ,it only transforms form one form to other form .

hence , option 1) : The total amount of energy in the universe remains constant.

4) Energy can be converted from one form to another.

5) Energy cannot be created or destroyed.

Best describes energy

learn more about law of conservation of energy

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Heat is a transfer of thermal energy from one object to anther because of a difference in?

Answers

Because of a difference in temperature.

temperature is the answer

A toaster with a power rating of 1,000 watts is plugged into a household voltage of 120 volts. How much current runs through the toaster? A) 120,000 amps
B) 880 amps
C) 8.3 amps
D) 0.120 amps

Answers

Answer : I = 8.33 A

Explanation :

It is given that,

Power rating of the toaster, P = 1000 watts

Household voltage, V = 120 volts

We know the relation between power, voltage and the current is :

$P=V* I$

$I=(P)/(V)$

$I=(1000\ W)/(120\ V)$

$I = 8.33\ A$

8.33 A of current runs through the toaster.

Hence, this is the required solution.

C) 8.3 i believe i wouldnt take me 100%

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10 m/s, northwest
14 m/s, northwest
48 m/s, northwest