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3 years ago

Which visible quality of smoke shows that it contains a lot of gas influencing the other particles?

2 answers:

6 0

Its D because i know that smoke does change very easily and its particles that dissolves in air which was infuenced by the gas. hope this helps man ;)

I am Lyosha [343]3 years ago

6 0

Answer: Option (B) is the correct answer.

Explanation:

Gases are defined as a state of matter in which molecules are far apart from each other due to more kinetic energy.

Hence, gases diffuse at a high rate and this is visible as we feel the odor.

Whereas gas molecules move readily and easily from one place to another. So like liquids, gases also acquire the shape of a container. But this change in volume is not visible in nature.

Therefore, we can conclude that smoke usually has an unpleasant smell is a visible quality of smoke shows that it contains a lot of gas influencing the other particles.

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A force of 250 N is applied to a hydraulic jack piston that is 0.02 m in diameter. If the piston that supports the load has a di

KATRIN_1 [288]

Answer:

C. 1400

Explanation:

The force exerted = f1 = 250

Diameter d1 = 0.02

r1 = d1/2 = 0.01

Diameter d2 = 0.15

r2 = d2/2 = 0.075

The mass of jack to lift

F1/A1 = f2/A2

250/r1² = f2/r2²

250/0.01² = f2/0.075²

When we cross multiply, we will have:

250x0.005625 = 0.0001f2

1.40625 = 0.0001f2

F2 = 1.40625/0.0001

F2 = 14062.5N

Force f = mg

g = 9.81

m = 14062.5/9.81

Mass = 1433Kg

Therefore option c is correct. A mass of 1400kg can be lifted by the jack

7 0

3 years ago

5. A star begins a s a ball of gas and dust pulled together by

erastova [34]

Answer:

d. Gravity

Explanation:

In the beginning of their lives, stars are formed when clouds of dust and gas are pulled together by gravity.

Hope this helps!!

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4 0

3 years ago

4. Inertia is directly related to A. Mass B. Mice C. Movement

Soloha48 [4]

A. Mass

Explanation:

Inertia is a property that is directly related to mass of a body. It can be defined as a property that causes a body to resist change in its state of motion.

Newton's first law of motion is known as the law of inertia.
The law state's that "an object will continue to be at rest or in uniform motion unless if it is being acted upon by an external force".

Inertia is related to force and it can be calculated using the expression below:

Inertia = m x a

where m is the mass of the body

a is the acceleration of the body

From this, we see that the more the mass of a body, the more its inertia and its reluctance to change its state of motion.

Therefore mass is directly related to inertia.

Learn more:

Inertia brainly.com/question/691705

#learnwithBrainly

8 0

4 years ago

A silver wire has a cross sectional area a = 2.0 mm2. a total of 9.4 × 1018 electrons pass through the wire in 3.0 s. the conduc

marta [7]

This problem uses the relationships among current I, current density J, and drift speed vd. We are given the total of electrons that pass through the wire in t = 3s and the area A, so we use the following equation to to find vd, from J and the known electron density n, so:

$v_{d} = \frac{J}{n\left | q \right |}$

The current I is any motion of charge from one region to another, so this is given by:

 $I = \frac{\Delta Q}{\Delta t} = \frac{9.4x1018electrons}{3s} = 3189.73(A)$

The magnitude of the current density is:

$J = \frac{I}{A} = \frac{3189.73}{2x10^{-6}} = 1594.86(A/m^{2})$

Being:

$A=2mm^{2} = 2x10^{-6}m^{2}$

Finally, for the drift velocity magnitude vd, we find:

 $v_{d} = \frac{1594.86}{5.8x1028\left |1.60x10^{-19}|\right } = 1.67x10^{18}(m/s)$

Notice: The current I is very high for this wire. The given values of the variables are a little bit odd

6 0

3 years ago

The density of a substance is calculated by what

pav-90 [236]

Answer:

Dividing mass by volume

Explanation:

Density of a substance is defined as the mass per unit volume of the same substance. Assuming the mass of the substance is 10 Kg and it displaces volume equivalent to 5 cc then its volume will be 10/5= 2 Kg/cc. Basically, to get the density of a substance, we divide the given mass by volume

8 0

3 years ago