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3 years ago

15

An engine is any machine that can _____.

1 answer:

Rzqust [24]3 years ago

7 0

The answer is
A, or convert an energy input to mechanical energy output.

This is because engines transfer whatever energy they need at first into mechanical energy to move. Like car engines. They make mechanical energy to help the car move.

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Antimony consists of two major isotopes with the following atomic masses: 121Sb (120.904 amu) and 123Sb (122.904 amu). The avera

Bad White [126]

Answer:

121Sb=57.2%

123Sb=42.8%

Explanation:

We are given that

Atomic mass of 121Sb=120.904 amu

Atomic mass of 123Sb=122.904 amu

Average atomic mass of antimony=121.760 amu

We have to find the percent of each of the isotope.

Let x be the percent of 121Sb and 1-x be the percent of 123Sb.

Using formula of average atomic weight

Average atomic weight=atomic weight of 121Sb $\times$ percentage abundance of isotope 121Sb+atomic weight of 123Sb $\times$ percentage abundance of isotope 123Sb

Substitute the values

$121.760=120.904x+122.904(1-x)$

$121.760=120.904x+122.904-122.904x$

$121.760=-2x+122.904$

$2x=122.904-121.760$

$2x=1.144$

$x=\frac{1.144}{2}=0.572$

Percentage of 121Sb= $0.572\times 100=$ 57.2%

Abundance of isotope 123Sb=1-0.572=0.428

Percentage of isotope 123Sb= $0.428\times 100=$ 42.8%

7 0

4 years ago

Explain why rolling friction is lesser than sliding friction <br> Pls ans this

larisa [96]

Answer:

As the area of contact is less in the case of rolling than in the case of sliding, rolling friction is less than the sliding friction.

8 0

3 years ago

Read 2 more answers

Near the earth's surface, the electric field in the open air has magnitude 150 N/c and is directed down towards the ground. If t

kati45 [8]

Hi there!

Using the equation for the electric field produced by an infinite sheet of charge:

$E = \frac{\sigma}{2\epsilon_0}$

E = Electric field strength (150 N/C)

σ = Surface charge density (? C/m²)

ε₀ = Permittivity of free space (8.8542× 10⁻¹² C²/Nm²)

We can rearrange the equation to solve for the surface charge density (charge per unit area)

$E = \frac{\sigma}{2\epsilon_0}\\\\\sigma = 2E\epsilon_0\\\\\sigma = 2(150)(8.8542*10^{-12}) = \boxed{2.656 \times 10^{-9} \frac{C}{m^2}}$

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2 years ago

soldier1979 [14.2K]

Answer:

c quarks nuenuertons d protonsa

6 0

3 years ago

Astrology is considered which of the following types of science?

Murljashka [212]

The answer is A. Astrology is pseudoscience because it is not scientifically backed.

5 0

4 years ago

Read 2 more answers