4,365 Answered Questions for the topic Science

05/27/20

i need help please

Identify one organism (plant or animal) in which artificial selection is used, and describe how that selection process occurs. 
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05/27/20

i need help please
do you think that organisms/species will become more different from each other over time? Or more similar? Explain your reasoning. 
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Science Biology Chemistry

05/27/20

I need help with this question. I cant answer it
What molecule determines which traits an organism has?I cant seem to answer it
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Science Physics

05/27/20

A 100-W light bulb is turned on. It has an operating voltage of 120 V.
A 100-W light bulb is turned on. It has an operating voltage of 120 V.a) how much current flows through the bulb?b) what is the resistance of the bulb?c) how much energy is used each second?
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Science Physics

05/27/20

Lenses- Physics
An object is placed 45 cm in front of a converging lens with a focal length of 20 cm. Draw a ray diagram. Estimate the image distance and give the image characteristics. the answer the book gives... more
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Science

05/27/20

In which direction does gravity operate on earth?

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Science Chemistry

05/26/20

There are 0.275 moles of gas in a container at a temperature of 75OC and a pressure of 200 kPa, what is the volume of the gas?
please explain how you got the answer, thank you
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Science Chemistry

05/26/20

There are 85 liters of gas held in a container at a pressure of 660 mmHg and a temperature of 90OC. How many moles of gas are there in the container?
please explain how you got the answer, thank you
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Science Biology

05/24/20

Need Help With This Biology Evolution Questions?
So I have a question concerning Amur Leopards (PANTHERA PARDUS ORIENTALIS​) 1. what type of speciation is involved with this type of leopard2. which one applies the animal gene flow or genetic... more
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Science

05/23/20

what is the density,in grams per mL (g/mL),of a liquid that has a mass of 206 g and a volume of 321 mL?
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05/22/20

What is the pH of the perchloric acid solution if 4.55 L of perchloric acid solution reacted completely with 1.86 g sodium carbonate in a double replacement reaction?
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Science Math

05/21/20

Is it possible to create a formula to rank subject on a scale of 1-10 (decimals acceptable) given the data?
Trying to create a formula to that ranks a subjects on a scale of 1-10Data I have includes, in no particular order The number of trials completed over the number of trials attempted. For example... more
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05/21/20

How many grams of water react completely with 5.0 g iron(III) chloride in the following reaction: iron(III) chloride + water → iron(III) hydroxide + hydrochloric acid
How many grams of water react completely with 5.0 g iron(III) chloride in the following reaction: iron(III) chloride + water → iron(III) hydroxide + hydrochloric acid
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05/21/20

what is the oxidation number of manganese in permanganate ion?
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05/21/20

how many grams of water react with 5 grams iron chloride
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05/21/20

how many grams of water are produced when 2.50 mol oxygen reacts with hydrogen
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05/21/20

how many grams of water are produced from reacting 32.0 g hydrogen??
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05/20/20

How much liquid (in mL) was originally in the beaker with the 20% solution and how much liquid (in mL) was originally in the beaker with 15% solution?
You have one beaker which contains an unknown amount of a 15% iodine solution and another beaker which contains an unknown amount of a 20% iodine solution. You add only half of the 20% solution to... more
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Science Chemistry

05/20/20

Question in the description can you please explain how you got the answer, thank you.
A cylinder with a movable piston contains 6.00 g of helium, at room temperature. More helium was added to the cylinder and the volume was adjusted so that the gas pressure remained the same.... more
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Science Chemistry

05/20/20

 7.00 L of argon gas is known to contain 78 grams. If the amount of gas is increased to 96 grams, what is the new volume (at an unchanged temperature and pressure)?
please explain how you got the answer, thank you
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Science

05/20/20

Problems solved
Problems solvedProblems solvedProblems solvedProblems solvedProblems solvedProblems solvedProblems solvedProblems solvedProblems solved
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Science

05/20/20

What is the density in grams per mL (g/mL) of a liquid that has a mass of 206 g and a volume of 321mL
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05/20/20

A random sample of 36 seventh grade students in Harvard are given an exam on a reading test. Below are their raw scores.
73, 77, 80, 80, 84, 86, 91, 93, 93, 93, 94, 97, 100, 100, 103, 103, 104, 105, 105, 106, 108, 110, 111, 117. 120, 120, 123, 124, 126, 128, 129, 129, 130, 130, 136Sample mean =... more
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Science

05/19/20

Does apparent motion mean that the stars seem to move because the earth is rotating on it's axis?
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Science 7th Grade

05/19/20

make a suggestion for how to help the Bighorn Sheep in California and Nevada access each other to increase genetic diversity. Include why genetic diversity is important to the health of the species.

It’s for science. Pls help :)!!
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