Which of the following is an example of heat convection?

Answer:

1. Atoms

2. element

Answer:

Zero (0)

Explanation:

Zero is only counted significant in some cases, and some of those are listed in the question.

For eg, 0.0003 (here 0 is insignificant), however, 3000.003 (here all 0's are significant)

Answer:

Viscosity is a measure of how much a liquid resists flowing freely.

Answer:

velosity is the anser

Explanation:

sorry for the spelling

Answer:

C because air purifier is very essential in dusty homes .

Answer:C

Explanation: The answer is C because an air purifier purifies the air in your room which is science.

Answer:

A. It is relative to the sun only when the train is not moving.

Explanation:

Answer: A

Explanation:

You are given the following parameters:

Length L = 2.0 cm and

cross-sectional area A = 0.060 cm^2

Conductance = 3.5×10^3 ohms

Conductance is a reciprocal of resistance R

Conductance = (σ × A)/L

Where σ = conductivity

Substitutes all the parameters into the formula

3.5×10^3 = (0.06 × σ)/2

Cross multiply

7×10^3 = 0.06σ

Make σ the subject of formula

σ = 7000/0.06

σ = 116666.67 ohm-1cm-1

σ = 1.2 ×10^5 ohm-1cm-1 approximately

Answer:

1.2 ×10^5

Explanation:

Answer:

1  

Explanation:

To satisfy the Octet Rule, Carbon needs 4 more valence electrons. Since each Oxygen atom has 3 lone pairs of electrons, they can each share 1 pair of electrons with Carbon; as a result, filling Carbon's outer valence shell

Answer:

The Answer Is 4!!

Explanation:

Hope This Helps:)))

Answer:

Straining method

Explanation:

Straining method is the method that can be used to separate parts of a liquid mixture when the entire mixture can pass through a filter.

Answer:

Explanation:

I don't think it matters while taking a shower, however, while using the restroom, it is especially encourgaed to wipe front to back. The reasoning behind this is to prevent UTI's that are transferred by fecal particles and bacteria from the anus into the vagina. Hope this helps:)

Answer: 0.125

Explanation:

Given that the

Object height U = 24.8 cm

Image height V = 3.09 cm

Magnification M is the ratio of the image height to the object height. That is, divide the given image height by the given object height.

M = V/U

Substitute V and U into the formula above.

M = 3.09/24.8

M = 0.125

Magnification is therefore equal to 0.125 approximately

Answer:

-0.125.

Explanation:

The previous explanation is right except for that it doesn't take into account that the -3.09 is negative – therefore, the positive answer is incorrect.

-0.125 is correct on Acellus.

Answer:

d. decreasing the mass of the car

Explanation:

Engineers are trying to improve race cars. Their goal is to increase the acceleration of the car using the same engine, it can be achieved by decreasing the mass of the car, therefore the correct answer is option C.

Newton's Second Law states that The resultant force acting on an object is proportional to the rate of change of momentum.

As given in the problem Engineers are trying to improve a race car. Their goal is to increase the acceleration of the car using the same engine,

The acceleration of the car can be increased by decreasing the mass of the car assuming the engine of the car is producing the same amount of force.

Thus, the acceleration can be increased by decreasing the mass of the car, therefore the correct answer is option C.

To learn more about Newton's second law, here refer to the link given below ;

brainly.com/question/13447525

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Answer:

the amplitude.

Explanation:

Answer:

d

Explanation:

In physics and engineering, a free body diagram (force diagram, or FBD) is a graphical illustration used to visualize the applied forces, moments, and resulting reactions on a body in a given condition.

Answer: All of the force vectors acting on an object.

Answer:

67

Explanation:

Answer:

35

Explanation:

It's a trick question!

Because the younger sister was half the age of Becky when she was 6. She also has to be half the age of Becky today.

So, 70 ÷ 2 = 35

Hope this helps you out! : )

[tex]\mathfrak{\huge{\pink{\underline{\underline{AnSwEr:-}}}}}[/tex]

Actually Welcome to the Concept of the Wave Optics.

Whenever the waves are out of phase they form a DESTRUCTIVE interference.

thus,

Destructive Interference occurs when two waves are out of phase.

Answer:

gravitational force increases

Explanation:

Since gravitational force is inversely proportional to the square of the separation distance between the two interacting objects, more separation distance will result in weaker gravitational forces. So as two objects are brought closer to each other, the force of gravitational attraction between them also increases.

Answer:

2.4

Explanation:

48,000/8000=6

square root of 6 = 2.44948974278

so 2.4

AnswerB.2.4m/s

Explanations;

24000=1/2×8000×v^2

24000/4000=v^2

√ 6.=v

v=2.4

Answer:

Last option in the list of possible answers, with U235 and n (neutron) in the left (originators) of the reaction diagram.

Explanation:

Uranium 235 (which is a fissile isotope of uranium) plus slow neutrons is what produce the chain reaction that feeds nuclear reactors.

Answer:

D

Explanation:

Did the test

Answer: LEO satellites are low earth orbiting whereas GEO satellites are geostationary earth orbiting satellites.

Explanation: Satellites in low Earth orbit, or LEO, are the closest devices to Earth. You'll often hear the terms GEO and GSO used interchangeably, but they’re not always the same. Both types of satellites sit at roughly 22,300 miles above Earth’s surface, but the way they orbit is different.

Answer:

1) The speed of sound increases

2)  440 Hz

3)  29°C

4)  17°C

5) 434 Hz

6)  12 m/s

7)  17.3 m

Explanation:

1) The speed of sound increases

2) V = f×λ

f = V/λ = 343/0.78 = 439.744 ≈ 440 Hz

3) V = f×λ

512 × 0.68 = 348.16 m/s

348.16 - 331 = 17.16

T = 17.16/0.6 = 28.6 ≈ 29°C

4) Increase in speed = 350 - 340 = 10

Increase in temperature = 10/0.6 = 16.67° ≈ 17°C

5) f = V/λ = 343/0.79 = 434 Hz

6) 331 + 0.6×30 - (331 × 0.6 ×10) = 12 m/s

7) V = 331 + 0.6×25 = 346m/s

λ = 346/20 = 17.3 m

Answer: D

Explanation: Resistance of current in a wire is directly proportional to the length of the wire and inversely proportional to the cross - sectional area of the wire. That is,

R = (rho × L)/A

Where

L = length of the wire

A = cross sectional Area of the wire

rho = resistivity = proportionality constant which depends on the quality of the wire.

Therefore, Resistance and resistivity are related by a:

proportionality constant dependent on the identity of the material.

Answer:

the main term used to locate in the alphabetic index for acute perforated gastrojejunal ulcer is ULCER

Explanation:

because the main is a term identifying disease conditions or injuries

Answer:

The answer is option A.

alpha decay

Hope this helps

Answer:  The two correct answers are Universe became more dense and universe became less transparent.

Explanation: I took the test  and those are correct

The incorrect statements on the diagram universe became more dense Universe became less transparent.

The universe is the whole cosmic system of matter and energy. The Earth, the Sun, the Moon, the planets, and the stars along with the dust, gases, and rocks form the universe.

The big bang is the theory that explains how the universe began. It says that the universe began with just a single point. It went on expanding and stretched to grow as large as possible. It is still now expanding.

The diagram (attached) illustrates the evolution of the universe, starting from the big bang. Each concentric circle represents a stage in the evolution as stated by the big bang theory.

Thus, the inaccurate statements on the diagram universe became more dense Universe became less transparent.

Learn more about the universe.

https://brainly.com/question/9724831

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Answer: D) 3.2 × 10^8

Explanation: Insulators are best described as materials which are poor conductors of electricity and hence do not allow passage of electricity through them. Resistivity are hence used to describe property or characteristic of a material which does not allow the flow or passage of electric current.

In summary, materials which high resistivity values are referred to as Insulators. Conversely, those with low resistivity or high conductivity values are called conductors while those with intermediate values are named semiconductors.

In the question given above, the material with a resistivity value of 3.2 × 10^8 - - - has a very high resistivity value (320000000Ω), the other options given have very low resistivity values ; 0.0000000017, etc and are most likely to be conductors due to their excessively low resistivity values.

Answer:

9,900 N

Explanation:

We know that the pressure in a fluid is transmitted with an equal pressure throughout, hence the formula [tex]pressure_1[/tex] = [tex]pressure_2[/tex]. As your know pressure is represented by force over area, so this formula can be rewritten as [tex]force_1/Area_1[/tex] = [tex]force_2/Area_2[/tex] .

3300 N / 0.060 m² = [tex]force_2[/tex] / 0.18 m²

Let's say that [tex]force_2[/tex] = x. Now let us solve for x.

3300 N / 0.060 m² = x / 0.18 m²,

3300 / 0.060 = x / 0.18,

55,000 = x / 0.18,

x = 55,000 [tex]*[/tex] 0.18 = 9,900 N - this is the force exerted on the second piston

Answer:

True

Explanation:

This is a fundamental concept in physics dealing with the nature of waves where when the waves collide with a barrier such as wall or some form of surface will reflect at an angle equal to the angle of incidence.

Answer:

The correct answer to the question is objects have zero acceleration.

Explanation:

Before answering the question, first we have to understand dynamic equilibrium .

A body moving with uniform velocity is said to be in dynamic equilibrium if the net external forces acting on the body is zero. Hence, the body is under balanced forces.

If the external forces acting on a body is not balanced, then the body will accelerate which will destroy its equilibrium condition. Hence, the necessary and sufficient condition for a body to be in dynamic equilibrium is that the forces are balanced.

When a body is in dynamic equilibrium, the body moves with uniform velocity along a straight line unless and until it is compelled by some external unbalanced forces.

Hence, the rate of change of velocity or acceleration of the body will be zero.

Answer:

objects have zero acceleration.

Explanation:

Answer:

It is not possible to find the square root in such a way

Explanation:

Answer:

Phenomenon

Explanation:

phe·nom·e·non

/fəˈnäməˌnän/

noun

1.

a fact or situation that is observed to exist or happen, especially one whose cause or explanation is in question:

"glaciers are unique and interesting natural phenomena"

synonyms

occurrence, event, happening, fact, situation, etc.

2.

a remarkable person, thing, or event:

"the band was a pop phenomenon just for their sales figures alone"

synonyms

marvel, sensation, wonder, prodigy, miracle, etc.