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3 years ago

7

Which method would you use if you have a pile of gravel with different types of rocks and minerals I needed to separate them int

o their individual components???
Evaporation.
Distillation.
Filtration.
Chromotography.

1 answer:

Ket [755]3 years ago

3 0

Answer:

Chromatography.

Explanation:

i think this would be the best way

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Madison lives near the ocean. She’s formed a hypothesis that increased concentrations of salt in the air speeds the corrosion of

kirill [66]

The variables that Madison will have to deal with to test her hypothesis that increased concentrations of salt in the air speeds the corrosion of certain metals are as follows:

Independent variable: concentration of salt
Dependent variable: corrosion of metal

<h3>What are independent and dependent variables?</h3>

In an experiment, the independent variable is the variable that is changed or manipulated in a series of experiments.

On the other hand, a dependent variable is that outcome measured to see the effectiveness of the treatment.

According to this question, Madison makes an hypothesis that an increased concentrations of salt in the air speeds the corrosion of certain metals, the variables she should look out for are as follows:

Independent variable: concentration of salt
Dependent variable: corrosion of metal

Learn more about variables at: brainly.com/question/1479694

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2 years ago

We can compare these two interactions on the basis of impulse (see above), but sometimes, we are more interested in the forces (

kiruha [24]

Complete Question

The complete question is shown on the first uploaded image

Answer:

a

$I = 476 \ N \cdot s$

b

$I_1 = 14.21 \ N\cdot s$

c

$F = 20300 \ N$

Explanation:

Considering the first question

From the question we are told that

The force produced is $F = 3400 \ N$

The duration of the punch is $t = 0.14 \ s$

Generally the impulse delivered is mathematically represented as

$I = F * t$

=> $I = 3400 * 0.14$

=> $I = 476 \ N \cdot s$

Considering the second question

The approaching velocity of the ball is $v_b = 45 \ m/s$

The leaving velocity of the ball is $v_l = -53 \ m/s$

The mass of the ball is $m_b = 0.145 \ kg$

Generally the magnitude of the impulse delivered is mathematically represented as

$I_1 = m* v_b - m * v_l$

=> $I_1 = [0.145 * 45] - [0.145 * -53]$

=> $I_1 = 14.21 \ N\cdot s$

Considering the third question

The duration of the impact of the bat is $t _1 = 0.7 \ ms = 0.7 *10^{-3} \ s$

Generally the average force exerted by the bat is mathematically represented as

$F = \frac{I_1}{t_1}$

=> $F = \frac{14.21 }{0.7 *10^{-3}}$

=> $F = 20300 \ N$

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4 years ago

You are asked to design a horizontal curve with a 40-degree central angle (' = 40) for a two-lane road with 11-ft lanes. the des

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3 years ago

An object was dropped from the plane with 1000 km above the ground with a mass of 300 kg. Find the acceleration of the object ea

Oxana [17]

Answer:

$9.8m/s^2$

Explanation:

The acceleration due to gravity on earth is $9.8m/s^2$ regardless of the mass of the object. This means, in the absence of air resistance, both a 3000 kg object and a 300 kg will accelerate at the same rate of $9.8m/s^2$ towards earth.

The reason the acceleration due to gravity is the same for all masses is that by grace of nature, the inertial mass $m$ of the object from $F= ma$ equals the gravitational mass $m$ from $F =G \dfrac{mM}{R^2}$ , resulting

$ma=G\dfrac{mM}{R^2}$

$\boxed{a=G\dfrac{M}{R^2}}$

which is the acceleration that only depends on the mass of earth and its radius, and not on the mass of the object.

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4 years ago

¿De qué altura cae un cuerpo que tarda 4 s en llegar al suelo? usar g = 10 m/s2 *

jasenka [17]

Answer:

hi

Explanation:

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3 years ago