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2 years ago

What are fossil fuels made of?

1 answer:

8 0

Fossil fuels are made of decayed plants and animals by being exposed to extreme heat or pressure from the crust of earth!! Hope this helps

You might be interested in

Basketball thrown over the shoulder to make a basket: Is this a projectile? why or why not

Korvikt [17]

Answer:

An object that is thrown, kicked or otherwise launched through the air is called a projectile.

Explanation:

5 0

1 year ago

A 13 cm long tendon was found to stretch 3.7 mm by a force of 12.1 N . The tendon was approximately round with an average diamet

liq [111]

Answer:

young's modulus $=\frac{stress}{strain}=\frac{0.1990\times 10^{6}}{28.46\times 10^{-3}}=6.99\times 10^6N/m^2$

Explanation:

We have given length of tendon L= 13 cm =0.13 m

Change in length $\Delta L=3.7mm=3.7\times 10^{-3}m$

Force = 12.1 N

Average diameter d =8.8 mm

So $r=\frac{d}{2}=\frac{8.8}{2}=4.4mm=4.4\times 10^{-3}m$

Area $A=\pi\times (4.4\times 10^{-3})^2=60.79\times 10^{-6}m^2$

Now stress $=\frac{force}{area}=\frac{12.1}{60.79\times 10^{-6}}=0.1990\times 10^6N/m^2$

Strain $=\frac{change\ in\ lenght}{length}=\frac{3.7\times 10^{-3}}{0.13}=28.46\times 10^{-3}$

Now young's modulus $=\frac{stress}{strain}=\frac{0.1990\times 10^{6}}{28.46\times 10^{-3}}=6.99\times 10^6N/m^2$

8 0

3 years ago

Consider a copper wire with a diameter of 0.450 mm. If you want to cut a piece of the wire so it has a resistance of 3.25 Ω, how

Arisa [49]

Answer:

30.7m

Explanation:

You can use the following equation:

ρ = R * $\frac{S}{l}$

Where ρ is the resistivity, R is the resistance, S is the Cross-sectional Area and l is the length of the wire.

We issolate l in the equation and solve with the data we have:

l = R * $\frac{S}{p}$ = 3.25 Ω * $\frac{0.25 *\pi * ((0.45/1000)^2}{1.68*10^-8}$

l = 30.7m

5 0

2 years ago

The tensile strength (the maximum tensile stress it can support without breaking) for a certain steel wire is 3000 MN/m2. What i

Orlov [11]

Answer:

The correct answer is "21195 N".

Explanation:

The given values are:

Tensile strength,

= 3000 MN/m²

Diameter,

= 3.0 mm

i.e.,

= 3×10⁻³ m

Now,

The maximum load will be:

= $Tensile \ strength\times Area$

On substituting the values, we get

= $(3000\times 10^6)(\frac{\pi}{4} (3\times 10^{-3})^2)$

= $(3000\times 10^6)(\frac{3.14}{4} (3\times 10^{-3})^2)$

= $21195 \ N$

4 0

3 years ago

A certain metal with atomic mass 2.2 × 10−25 kg has an interatomic bond with length 2.3 × 10−10 m and stiffness 43 N/m. What is

Alexandra [31]

Answer:

The speed of sound in a rod made of the material is 3215.52 m/s.

Explanation:

The speed of sound can be found using the formula:

$V=\sqrt{\frac{s}{m}}*d$

Where s is the stiffness, m the atomic mass and d is the length of the interatomic bond.

You just have to correctly replace these values in the formula above.

$V=\sqrt{\frac{43N/m}{2.2 * Exp-25 kg}}*(2.3 * Exp-10 m)$

V= 3215.52 m/s

3 0

2 years ago