3 years ago

5 QUESTIONS PLZ ANSWER ASAP SCIENCE

Chemistry

2 answers:

nadya68 [22]3 years ago

7 0

Without gravity we would float away from the ground

sweet-ann [11.9K]3 years ago

3 0

A. Plastic is a good insulator.

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A new penny has a mass of 2.49 grams and occupies 0.349 cm cubed. If pure copper has a density of 8.96 g/cm cubed, is the new pe

lys-0071 [83]

Answer: The new penny is not pure copper

Explanation:

Density $\rho$ is defined as a relation between the mass $m$ and the volume $V$ :

$\rho=\frac{m}{V}$

Now, we are told the density of pure copper is:

$\rho_{copper}=8.96 g/cm^{3}$

And we are given the mass and volume of the new penny, with which we can calculate its density:

$\rho_{penny}=\frac{m_{penny}}{V_{penny}}=\frac{2.49 g}{0.349 cm^{3}}$

$\rho_{penny}=7.13 g/cm^{3}$ As we can see the density of this penny is not equal to the density of pure copper, hence the new penny is not pure copper.

8 0

4 years ago

Which part of the water cycle would follow step C in the diagram shown?

castortr0y [4]

Evaporation

Explanation:

From C to D, the phase changes from liquid to gas and it is called evaporation.

Evaporation is a phase change process in which liquid water is converted to gaseous vapor.

During evaporation, the liquid is heated till the particles gain sufficient energy that allows the molecules to escape. The reverse process in which gas is turned to liquid is called condensation.

Learn more:

Evaporation brainly.com/question/10972073

#learnwithBrainly

6 0

3 years ago

Which of the following is NOT a unit energy? (select all that applies)

never [62]

Answer:

Kelvin, Celsius, Fahrenheit

Explanation:

See my other answer for an explanation.

4 0