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3 years ago

If the mass of a material is 99 grams and the volume of the material is 22 cm3, what would the density of the material be?

1 answer:

7 0

You are asked to give the answer in <span>g/cm3. So without knowing any single formulae you can just divide grams by cm3.

</span> $\frac{99 grams}{22 cm^{3} }$

= 4.5 g/cm3

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A 2.0 m length of wire is made by welding the end of a 120 cm long silver wire to the end of an 80 cm long copper wire. Each pie

Levart [38]

<u>Explanation</u>:

Resistivity of silver wire = $1.47 e-8 ohm meter$

Resistivity of copper wire = $1.72 \mathrm{e}-8 \text { ohm meter }$

Resistance = Resistivity *length/cross sectional area

$R=\rho_{L / A}$

So,

$\begin{aligned}&I=A\left(V / P_{A g} L_{A g}+P_{C u} L C_{U}\right)\\&1=8104 \mathrm{A}\end{aligned}$

For E calculation

For copper

E = resistivity * current density

E = Resistivity * current/area

$E=4.9298 \mathrm{V} / \mathrm{m}$

For silver

$E=4.213 \mathrm{V} / \mathrm{m}$

Potential difference $=E^{*} L$

For silver

Potential difference = $4.213^{*} 1.2=5.055 \mathrm{V}$

For copper

Potential difference = $3.9438 \mathrm{V}$

7 0

2 years ago

a dog usually moves faster than a bug . That means that if i watch them move for one minute, then the dog would have traveled a

galben [10]

The dog would have traveled a greater distance than the bug.
The car goes faster than the dog and will travel to the end of the road faster than the dog.

Hope this helps! Have a great day :)

(ps. brainliest, please?)

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3 years ago

Question 2 of 10 Which process is the source of all the thermal energy produced by a nuclear reactor? O A. Radioactive decay B.

sukhopar [10]

Answer:

Explanation:

A P E X

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3 years ago

A transverse wave passes through a slinky

e-lub [12.9K]

Last one!

Perpendicular to the wave's energy

Hope this helps!

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1 year ago

What would be the path of the moon if somehow all gravitational forces on it vanished to zero?

Georgia [21]

The Moon would take off in a straight line, at a constant speed, with the
same speed and direction it had at the instant that gravity got switched off.

(Of course, if ALL gravity got switched off, then the Moon would fall apart.
The radioactive and volcanic heat activity in its core would continue, and
suddenly there wouldn't be anything to hold it together. Same for the Earth.)

6 0

3 years ago