4,347 Answered Questions for the topic Science

09/20/22

Refraction in a prism
I'm having problems with this optics problem:Glass prism ABC with refractive index n1 = 1.6, vertex A angle α = 40° and vertex B angle β = 60°,placed in a container with two different liquids... more
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09/20/22

Kirchoff's laws and electrical circuit
Two batteries with emf ε1 = 10 V and emf ε2 = 20 V and internal resistances r1 = 1 Ω and r2 = 2 Ω, respectively, are connected in parallel, and then connected in parallel to a resistor of R = 30 Ω... more
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09/20/22

Melting ice cubes
Two identical ice cubes are placed in two large containers, one containing tap water and the other containing a strong saline solution. Both liquids are of equal volume and at the same room... more
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Science Chemistry

09/18/22

What gas law should I use to solve the following problems?
A 6.53g of solid CO2 is put in an empty sealed 7.00 L container at a temperature of 310 K. When all the solid CO2 becomes gas, what will be the pressure in the container? A cylinder... more
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Science Math Chemistry

09/18/22

In regards to difference, mean and deviation.
So my question asks that if any of my individual results from the mean differ by more than 3 times the standard deviation I have to reject that number and calculate a new mean. (Underlined texts I... more
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Science

09/17/22

What are three types of everyday movement that researchers are harnessing with nanogenerators? pls help me

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09/16/22

Do you think that glycerol can be detected in all fats? Why?
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Science Chemistry

09/15/22

How many hydrogen atoms are in 0.1488 g of phosphoric acid, H₃PO₄?
0.1488 g H₃PO₄ x (----) x (----) = ?
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Science Chemistry

09/15/22

Determine the mass in grams of 1.6 x 10^-3 mol glucose, C₆H₁₂O₆
1.6 x 10^-3 mol C₆H₁₂O₆ x (----) x (----) = ?
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Science Math Physics

09/14/22

Please help with calculating force on particle.
T‎wo fix‎ed par‎ticles, ea‎ch of ch‎arge 5.0x10-6, are 24 cm a‎part. wha‎t for‎ce do th‎ey exe‎rt on thir‎d pa‎rticle of c‎harge -2.5x10-6 t‎‎hat is 13 cm from eac‎h of th‎emExpress answer in... more
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09/14/22

If 0.5 g of a drug sample were dissolved in 25 mL solvent, how would you describe its solubility?
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Science Math Art English

09/12/22

If I delete my profile, will my asked questions also disappear?
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09/12/22

Cardiovascular and circulatory system
Differentiate between the cardiovascular and circulatory systemDescribe four chambers of the heart.
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09/12/22

Why should the temperature of the sample be controlled during the refractive index measurement?
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09/12/22

Senior High school Project ideas - Scientific

Hi! I’m doing a big project in Senior high school right now that plays a huge part in my graduation and would appreciate some help!I have to come up with an idea/subject that includes a good... more
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Science Math Chemistry

09/06/22

The following questions deal with the nature of light and color. (Enter your answers using scientific notation.)
a)  A photon has a wavelength of 510. nanometers (nm). What is the length in meters?b) What is the frequency of this photon? _____ s-1c)  What is the energy of this photon? ___J
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Science Chemistry

09/05/22

When ionic solids dissolve in water, they produce soluble aqueous cations and anions. For example, adding MgBr2 solids to water will produce ions according to the dissolution reaction below.
MgBr2(s) → Mg2+(aq) + 2 Br−(aq)cation AnionIn this lab, you will be observing the color of emission from ions dissolved in solution. Please write the dissolution reaction for each of the... more
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Science Chemistry

09/05/22

Calculate the number of atoms in a 27.2 mg sample of Ga.

The molar mass of Gallium (Ga) is 69.72 g/mol
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09/04/22

Help me write a story
please help me write a childrens story that including these words,   Biology, homeostasis, reproduction or reproduce, metabolism, evolve, biosphere, tertiary consumer, autotroph, scavenger,... more
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Science Chemistry

09/04/22

A 1.60 g calcium supplement contains 37.8% Ca by mass. The calcium is present in the supplement as CaCO3. How many grams of CaCO3 are in the calcium supplement?
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09/03/22

How much aluminum hydroxide in kilogram is needed for the batch size?
Antacid tabletAluminum hydroxide - 325 mgMannitol - 812 mgSodium saccharin - 0.4 mgSorbitol (10% w/v solution) - 32.5 mgMagnesium stearate - 35 mgMint flavor concentrate - 4 mgBatch size: 150,000... more
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09/03/22

Is energy always associated with biochemical processes?
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09/01/22

A pharmacist is to prepare 300 g of an ointment containing 50 mL of glycerin. The density of glycerin is 1.25 g/mL.
What is the % w/w of this preparation?
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08/29/22

if a sample containing...
If a sample containing 13.7 g of H2 is reacted with 31.9 g of O2, determine the theoretical yield of H2O.
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Science Chemistry

08/24/22

Chemistry stoichiometry

calculate how many moles of NO2 form when each quantity of reactant completely reacts2N2O5 (g) -> 4NO2 (g) + O2 (g)a.) 2.5 mol N2O5b.) 6.8 mol N2O5c.) 15.2 g N2O5d.) 2.87 kg N2O5
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