answersLogoWhite

0

🧪

Science Experiments

Experiments often conducted by students to test different scientific theories and hypotheses

11,111 Questions

What is the scaling relationship between the variables in this experiment?

Oh, what a lovely question! Think of scaling like the way different colors blend in a beautiful sunset painting. In this experiment, calculating the scaling relationship simply means understanding how one variable changes in relation to another. It's like nature's own perfect balance, where everything is connected just like the branches of a big happy tree. It's all part of making our work a little masterpiece. Happy experimenting!

What would happen if water is running out of the drain faster than the spigot is putting water into the tub?

If the water is draining faster than the spigot is supplying water, the water level in the tub will decrease until the drain and spigot reach equilibrium. This may result in an empty tub if the drain efficiency is higher than the spigot's flow rate.

What is the average year of hurricanes?

The average year of hurricanes varies, but generally peaks between June and November in the Atlantic Ocean. This is known as hurricane season, with the most activity typically occurring in September. The Pacific hurricane season tends to be longer, running from May to November.

What are the 5 categories of a star?

The five categories of a star classification are O, B, A, F, G, K, and M. These categories are based on the star's surface temperature, color, and spectral features. O stars are the hottest and bluest, while M stars are the coolest and reddest.

What is the chemical definition of meniscus?

It is from the Greek meaning crescent. When you measure the volume of water (or similar liquid) in a measuring cylinder, if you look carefully you will notice the surface water level is not perfectly flat. It will be curved, this is called the meniscus. To accurately measure the volume you must look at the meniscus at eye level and take the reading at the bottom of the meniscus.

The meniscus occurs because water is attracted to the glass/plastic. All equipment that is intended to measure volume will take into account the meniscus, as long as you take your reading with the meniscus at eye level. The measurement must be done at eye level in order to ensure no parallax error. NOTE mercury's meniscus is convex rather than concave, as it is not attracted the glass/plastic.

When you add an acid to an alkali it changes to a neutral which colour change would this show with an indicator?

It depends on the indicator and there are quite a few. Methyl Red, Methyl orange and Phenolphthalein are 3 such acid-base indicators. If phenolphthalein is used as the indicator and added to the base it would immediately turn red/pink. As acid is titrated in, the red/pink will disappear and go colorless.

Is there less gravitational pull the higher you go?

Yes, gravitational pull decreases as you move farther from the center of the Earth, so you will experience less gravitational pull the higher you go above the Earth's surface. This is due to the inverse square law, which states that gravitational force decreases with the square of the distance between two objects.

What is the word that defines an investigation that is controlled?

Experiment is the word that defines an investigation in science that is controlled.

In 1977 a team led by which embryologist created history by cloning the first adult mammal?

In 1997, a team led by embryologist Dr. Ian Wilmut successfully cloned the first adult mammal, a sheep named Dolly. This groundbreaking achievement demonstrated that it is possible to clone mammals from adult cells.

Who first used the cork for a laboratory apparatus?

I think you might be talking about Robert Hooke, he first discovered cells by looking at cork from a cork tree under a microscope, he did not actually use the cork as an apparatus. Therefore i think this falls more under biology. However if that is not what your talking about then I honestly don't know.

How many times does the moon go round earth?

The moon orbits around the Earth approximately once every 27.3 days. This period is known as a synodic month or lunar month.

What role does nectar have in the process of pollination?

The role that nectar has in the process of pollination involves gathering pollen on their legs as they drink nectar. At the next floral nectar stop, the pollen rubs off and fertilizes the receiving plant so that seeds and therefore new plants grow.

Are PLANARIA segmented?

No, planaria are not segmented. They are flatworms that have a simple body plan with bilateral symmetry. They do not have true segments like some other invertebrates.

Why would your weight be different on the moon but your mass will still be the same?

Your mass is a measure of the amount of stuff you're made of. It doesn't change.

It's like the amount of money in your pocket. You can carry it around anywhere,

and no matter where you are, it doesn't change.

Your weight is a force between you and something else, caused by gravity. The

strength of it depends on both masses ... yours and the other thing, and it also

depends on how far apart you and the other thing are. If the other thing is the

Earth, the force has a certain strength. If the other thing is the moon and you're

on it, then the force has less strength, because the moon has less mass than the

Earth has. And if you're in a space capsule on the way from the Earth to the moon,

then you're pretty far away from anything with much mass, so the force is very tiny.

Plus you're "falling" toward the moon, and you never feel any gravitational force

at all when you're falling.

So ... mass is how much stuff you have. Weight is how your stuff behaves around

other masses.

Will the sun become a white dwarf in the next 20 years?

No.

It will become a white dwarf in about 7.5 billion years time.

What is MPLC Chromatography?

MPLC stands for Medium-Pressure Liquid Chromatography, which is a chromatographic technique used for separating and purifying compounds based on their interactions with a stationary phase as they pass through a column under medium pressure. It is a versatile and efficient method commonly used in the purification of natural products, peptides, and other organic compounds.

How does the transpiration affects the distribution of stomata in a leaf?

Transpiration in a leaf causes water to be lost through the stomata, leading to a decrease in internal water pressure. To compensate for this loss, stomata are typically distributed more on the lower surface of a leaf where there is less direct sunlight and wind exposure, helping to reduce excessive water loss and maintain the plant's hydration levels.

What is the lab equipment for separating kerosene water mixture?

The lab equipment commonly used for separating a kerosene-water mixture is a separating funnel. The mixture is poured into the funnel, and due to the immiscibility of kerosene and water, they separate into distinct layers with the denser water sinking to the bottom and the lighter kerosene floating on top. The tap at the bottom of the funnel can then be opened to drain off the water, allowing for the collection of the kerosene.

What do animals hear different to humans?

Animals may hear higher frequencies than humans, such as ultrasound in bats or dolphins. Some animals, like dogs, can detect sound at greater distances than humans. Additionally, some animals have specialized ear structures that aid in their hearing abilities, like the large ears of certain owl species for effective hunting at night.

Why are magnetosphere so important?

The magnetosphere is important because it acts as a protective shield around Earth, deflecting harmful solar wind and cosmic rays. Without the magnetosphere, these particles could strip away the atmosphere and make it difficult for life to exist on Earth. Additionally, the magnetosphere plays a key role in generating phenomena such as the auroras.

Why rainbow is not formed or seen in moonlight or in dark or at night?

Rainbows are formed when sunlight is refracted and reflected through water droplets in the atmosphere. Moonlight is not bright enough to create the same effect. Similarly, rainbows are not visible in the dark or at night because the sunlight necessary for their formation is absent.

What are the effects of increasing temperature on the rate of digestion?

Increasing temperature can initially increase the rate of digestion by speeding up enzyme activity, which helps break down food faster. However, if the temperature gets too high, it can denature enzymes and disrupt the digestive process, leading to a decrease in digestion efficiency. Optimal temperature ranges for digestion vary depending on the specific enzymes involved.

Light and heat given off by the sun is called?

The light and heat given off by the sun is called solar energy. Solar energy is produced by nuclear fusion reactions in the sun's core, which create electromagnetic radiation that reaches the Earth.

How is a spectrophotometer calibrated?

Spectrophotometers

are useful devices that allow you to mainly find out the concentration of molecules within a reaction mixture. This mixture could be an enzyme and its substrate, or much simpler chemicals.

Most spectrophotometers

work using light from the U.V-visible

part of the electromagnetic spectrum (150-700nm). The radiation hits the sample. Some parts of the sample molecules, called chromophores,

absorb some of this radiation. A detector measures how much radiation has been absorbed by the sample.

One can then use the Beer-Lambert

law to calculate the concentration of your chemical sample. The law is given by A=Ecl


A=Absorbance,

E=Molar

extinction coefficient (constant unique to different chromophores)

c=concentration

l=path

length (usually 1cm- the size of the reaction vessel). From the absorbance

value given by our sample, and its molar extinction coefficient, one can then rearrange the equation to find c:
c=A

/E.l



From this, one can work out the rates of chemical reactions etc.

N.B-

As a side-note,

the technique is cheap, easy and reliable. Also, The 'E' above is notated as a Greek letter 'Eta' in other reference sources, just in case you read up more about the Beer-Lambert

Law.