Newest Science Questions | Wyzant Ask An Expert

11/21/21

Equation making question

This is the question:An experiment produced the set of values shown below for separation (d) and energy (E). A graph was drawn of E as a function of d. Determine an equation relating E and d.... more

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Science Math Physics

11/20/21

An object is projected horizontally from a measured vertical height and travels a measured horizontal distance. Design an experimental procedure by which the relationship between these values can... more

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Science Math Physics

11/20/21

Thinking problem

In a last-ditch attempt to increase their budget, science teachers at CDDHS cast small solid bronze busts of their principal for sale to students as doorstops, paperweights, etc. One order, in... more

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Science Math Chemistry Physics

11/20/21

Tricky math problem

Gemstones are measured in carats (CD), with a carat having a mass of 200.0 milligrams.A unit of area used in nuclear physics is the barn (b). One barn equals 1 x 10-28 m2, a typical nuclear cross... more

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Science Psychology

11/20/21

Give one specific example of how the following kinds of biases could arise in the study and explain how you would avoid them. a) Participation Bias (2 points) b) Publication Bias (2 points)

A study is performed to determine the effect of nicotine on attention span. Nicotine is the addictive component of tobacco. The sample is divided into a group that is required to wear a nicotine... more

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Science Math Physics

11/20/21

Please help, I can't seem to figure out the answer to this homework question

This is the question: In a last-ditch attempt to increase their budget, science teachers at CDDHS cast small solid bronze busts of their principal for sale to students as doorstops, paperweights,... more

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Science Chemistry Physics

11/19/21

Hard question on science quiz!

This is the question we have been asked: Gemstones are measured in carats (CD), with a carat having a mass of 200.0 milligrams.A unit of area used in nuclear physics is the barn (b). One barn... more

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Science Chemistry

11/19/21

I mixed Lysol and Clorox, am I safe?

So I accidentally mixed Lysol and Clorox together, and the mixture turned yellow when moved. Am I safe?

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Science Biology

11/18/21

INSTRUCTION: Answer the following questions, explain your answers by citing your references and evidences (make your answer as brief as possible and underline the key words/ phrases)

1. At present, a significant increase in greenhouse gases and atmospheric temperature is being felt. How will this affect the activities of plants, animals, microorganisms, etc. in terms of... more

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Science Biology Chemistry Botany

11/18/21

What are the main functions of underground stems?

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Science Biology Chemistry Botany

11/18/21

What are the advantages and disadvantages of producing small leaves instead of fewer large leaves?

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Science Biology Chemistry Botany

11/18/21

Why glucose is osmotically active and starch is not

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Science Cells

11/17/21

How meany cells are in the humian body?

Differt types of cells in the humian body and how meany are there

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Science Chemistry Biochemistry

11/15/21

How to draw the structure of:

hexapeptide NH3+-MIGHTY-COO-

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Science Biology Anatomy Physiology

11/13/21

I have a small anatomy/physiology question

Explain why keratinocytes from the epidermis can be grown (cultured) in a plastic flask.

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Science Chemistry

11/12/21

The positive side of a household battery is called the ________.

A. anodeB. cathodeC. diodeD. triodeE. None of the above

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Science Chemistry

11/12/21

Hydrogen can have an oxidation number of –1 when _______.

A. it is grouped in molecules with three or more atomsB. it is grouped with just one other atom that is a noble gasC. it is grouped with just one other atom that is a metalD. it is grouped with... more

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Science Chemistry

11/12/21

Can someone please help me and check-over my answers to these two Chemistry problems?

Group 1A metals always have an oxidation number of _______ in molecules that contain more than one type of atom.A. –2B. –1C. 0D. +1E. +2 Group 2A metals always have an oxidation number of _______... more

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Science Homeschool Chemistry

11/10/21

Can someone please help me with these two Chemistry problems?

In the reaction 2Mg (s) + O2 (g) + 2H2O (l) → 2Mg2+ (aq) + 4OH– (aq), which substance is reduced?A. MgB. OC. H2OD. OHE. None of the Above (This is not a redox reaction.)In the reaction 2H2O (l) +... more

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Science Geology Gravity Minerals

11/10/21

Question about feldspar minerals and their specific gravity

Why does the larger cavities of the feldspars have a decrease in specific gravity?

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Science Chemistry Chem Ap Chem

11/10/21

AP chem question

How many moles of magnesium oxide are produced by the reaction of 3.82 g of magnesium nitride with 7.73g of water?Mg3N2 + 3H2O -> 2NH3 + 3MgOa) 0.114b) 0.0378c) 0.429d) 0.0756e) 4.57can someone... more

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Science Homeschool 5th Grade

11/10/21

how much force is needed to accelerate 300 kg at arat of 4 m/s/s/

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Science Homeschool Chemistry

11/09/21

Can someone please check-over my Chemistry homework?

In the reaction 2Mg (s) + O2 (g) + 2H2O (l) → 2Mg2+ (aq) + 4OH– (aq), which substance is oxidized?A. MgB. OC. H2OD. OHE. None of the Above (This is not a redox reaction.) In the reaction 2Mg (s) +... more

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Science Chemistry Physics Biochemistry

11/09/21

Compute the total enthalpy change by using the Hess Law

Use the Hess law to calculate the total enthalpy2H2O ------> 2H2 + O2 +572 KJ/mol2HF ------> H2 + F2 + 542 KJ/mol

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Science Chemistry Physics Biochemistry

11/09/21

----------Chemistry--------

Prove that the enthalpy change of formation is equal to the total change reaction using carbon dioxide.C2H5OH + O2 ------> CO2 + H2OC2H5OH ------- ΔH= -278KJ O2 ------- ΔH= 0 ... more

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Equation making question

projectile problem

Thinking problem

Tricky math problem

Give one specific example of how the following kinds of biases could arise in the study and explain how you would avoid them. a) Participation Bias (2 points) b) Publication Bias (2 points)

Please help, I can't seem to figure out the answer to this homework question

Hard question on science quiz!

I mixed Lysol and Clorox, am I safe?

INSTRUCTION: Answer the following questions, explain your answers by citing your references and evidences (make your answer as brief as possible and underline the key words/ phrases)

What are the main functions of underground stems?

What are the advantages and disadvantages of producing small leaves instead of fewer large leaves?

Why glucose is osmotically active and starch is not

How meany cells are in the humian body?

How to draw the structure of:

I have a small anatomy/physiology question

The positive side of a household battery is called the ________.

Hydrogen can have an oxidation number of –1 when _______.

Can someone please help me and check-over my answers to these two Chemistry problems?

Can someone please help me with these two Chemistry problems?

Question about feldspar minerals and their specific gravity

AP chem question

how much force is needed to accelerate 300 kg at arat of 4 m/s/s/

Can someone please check-over my Chemistry homework?

Compute the total enthalpy change by using the Hess Law

----------Chemistry--------

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