What force keeps a water spider on the surface of water

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Answer 1

Answer: i think it's surface tension force

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What is the acceleration of a car moving along a straight road that increases its speed from 0 to 100 km/h in 10 s? 10 m/s2 100 km/h·s 1 km/h·s 10 km/h·s

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100 - 0 km/ 10 seconds. Divide it and then you will get your answer. Answer : 10km/ seconds

The density of table sugar is 1.59 g/cm3. What is the volume of 7.85 g of sugar?

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$(7.85g )/(1.59 (g)/( cm^(3) ) )$ = 4.937 $cm^(3)$

Which of the following substances is a mixture? a. Baking soda b. Gasoline c. Salt d. Sugar

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Among the following substances, Gasoline is a mixture. The correct option is (b).

Octane, heptane, and other hydrocarbon molecules obtained from petroleum are all mixed together to make petrol. The gasoline utilized in engines is not a single, pure material but rather a mixture of several different compounds.

Baking soda (a), salt (c), and sugar (d) are pure ingredients as opposed to mixes. While sugar (sucrose) is a pure organic component, baking soda (sodium bicarbonate) and salt (sodium chloride) are substances with particular chemical compositions.

Hence, the correct option is (b).

To learn more about Mixtures, here:

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I do belive That Gasoline is a mixture

Determine the resistance of 100m of copper cable whose cross-sectional area is 1.5mm2

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20*% is that one trust meeeeee

A metal pot feels hot to the touch, but the plastic handle does not. Which type of material is the plastic handle? A. A thermal insulator, because it transfers heat easily B. A thermal conductor, because it does not transfer heat easily C. A thermal conductor, because it transfers heat easily D. A thermal insulator, because it does not transfer heat easily

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Answer:

Option (D)

Explanation:

There are two types of materials.

1. Conductors: The materials which can allow the heat to pass through it are called conductors. For example, iron, copper, etc.

2. Insulators: The materials which do not heat to pass through it are called insulators. For example, plastic, wood, rubber, etc.

Here plastic handle does not feel hot because it is an insulator and it does not allow to pass the heat through it.

D is the answer..........

Glass windows allow light in, but trap the heat inside. This describes _____. a greenhouse effect convection global warming conduction

Answers

Answer: The correct answer is green house effect.

Explanation:

Green house effect:It is a process in which the infrared rays coming from the sun gets absorbed or re-emitted in the atmosphere. In this way the heat is trapped in the atmosphere.

In the given problem, glass windows allow light in, but trap the heat inside. This effect is due to the green house effect.

Convection: It is a process in which there is an actual movement of heat particle.

Conduction: It is a process in which there is no actual movement of the particle. It transfers heat directly from one place to another.

Global warming: The gradual increase in the overall temperature of earth's atmosphere that causes change in the climate. It is the result of the green house effect.

Therefore, glass windows allow light in, but trap the heat inside. This describes green house effect.

Greenhouse effect allows earth to stay warm enough for life to survive, increasing the amount of the greenhouse effect can cause global warming which is not good for the life in the surface of the earth because they'll be experiencing more heat that the regular heat energy given by the sun.

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A compound microscope that has an eyepiece lens with a magnification of 10X and an objective lens with a magnification of 25X will have a total magnification of __________ times.

If a device uses 280 watts of power a day, about how many kilowatt-hours will it use in 30 days?