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Inessa05 [86]
3 years ago
12

 i WILL GIVE BRAINLYEST:::I NEED HELP SO BAD THE QUSTION IS AT THE END U JUST HAVE TO READ ALL THIS ... THE QUSTION IS AT THE EN

D
In this task, you will use an engineering design method to create two solar ovens. Here’s one way to approach an engineering design:

Define the problem.
List the potential solutions.
Pick the best solution and build it.
Test the solution.
Improve the design.
Estimated time to complete: 3 hours

You will need these materials:

2 thermometers that reach at least 120°F (50°C)
2 boxes of any size that the thermometer will fit inside
Optional materials you might need to complete your designs:

plastic wrap
aluminum foil
paper
scissors or a box cutter
ruler
masking tape or clear packaging tape
glue
Stay safe! Work slowly and carefully with the scissors so you do not cut yourself. Handle thermometers carefully. Remember, they are breakable. Thermometers can contain hazardous materials. If you break a thermometer, ask for an adult’s assistance to clean it up. Construct all solar ovens outdoors in an open area.

Design, Build, and Test
Part A

In this activity, you will construct two solar ovens and use thermometers to determine which oven gets the hottest. What engineering problem are you trying to solve?
Chemistry
1 answer:
topjm [15]3 years ago
3 0
I am pretty shor it is energy.
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“Water” is the best thermal insulator.

Option: B

<u>Explanation</u>:

“Thermal insulators” are the materials which do not allow heat to transfer. “Water” is the substance which does not transfer heat. Hence, the “water” is the best “thermal insulator”. Water is the bad conductor of thermal heat. Water has “low thermal conductivity” than other substances, so this acts as an insulator as long as it is not traveled from one place to another. Heat is transferred when a “hot object collides” with “the cold objects”. The “thermal conductivity” of “water” is 0.6 W/m K.

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mariarad [96]

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Explanation:

7 0
3 years ago
Read 2 more answers
If the density of a 45.0 cm3 block of wood is 0.65 g/ml what is the mass of the wood?
wlad13 [49]

Answer:

\boxed {\tt mass=29.25 \ grams}

Explanation:

The density formula is mass over volume.

d=\frac{m}{v}

Rearrange the formula for the mass, m. Multiply both sides of the formula by v.

d*v=\frac{m}{v}*v

d*v=m

Mass can be found by multiplying the density and volume. The density is 0.65 grams per milliliter and the volume is 45.0 cubic centimeters.

  • A cubic centimeter is equal to a milliliter.
  • Therefore, 45 cubic centimeters also equals 45 milliliters.

d= 0.65 \ g/mL\\v= 45 \ mL

Substitute the values into the formula.

0.65 \ g/mL * 45 \ mL=m

Multiply. Note the milliliters, or mL will cancel out.

0.65 \ g * 45=m

29.25 \ g=m

The mass of the wood is 29.25 grams.

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3 years ago
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