Thursday

September 29, 2016
Total # Posts: 390

**Chemistry Help Please!**

1) You have a protein at 20 ug/ml. Its MW =10,000. What is the concentration in molarity? Show work please! 2) You are asked to make 30 mL of a solution at 0.03M using the 0.10M stock solution. How many mililliliters of water do you use to make this solution? How many ...

*July 3, 2016*

**Biology Help Please!**

1) Which tube will be most 'yellow' at the end of the experiment? ( For Enzyme Kinetics Experiment) a) Substrate Concentration: 0.006M (my answer) Inhibitor: absent b) Substrate Concentration: 0.006M Inhibitor: un-competitive inhibitor present c) Substrate ...

*June 19, 2016*

**Biology Help Please!**

(In enzyme kinetics experiment)

*June 18, 2016*

**Biology Help Please!**

1) Which tube will be most 'yellow' at the end of the experiment? a)Substrate Concentration: 0.006M Inhibitor: absent b)Substrate Concentration: 0.006M Inhibitor: un-competitive inhibitor present c) Substrate Concentration: 0.0005M Inhibitor: un-competitive inhibitor ...

*June 18, 2016*

**Biology Help Please!**

)Describe the importance of chromatin remodeling process to transcription. Select the four correct answers. a) These alterations can be used to activate transcription of a gene by hiding its enhancer sequences. b) These alterations can be used to activate transcription of a ...

*April 24, 2016*

**life orientation**

the human rights influence to treat each other equally and with respect towards one another, to not be racist, we are able to live and to express ourselves, and that we should respect our rights and others rights

*April 23, 2016*

**life orientation**

the violation depends on your research

*April 23, 2016*

**life orientation**

theres the human right to no slavery, we are all free and equal, and the right to education. these are really important for example no one has the right to make someone there slave, we are all born free and we should all be treated the same, and we have the right to learn

*April 23, 2016*

**Life orientation**

what is the crime and the consequences?

*April 23, 2016*

**life orientation**

individuals should know and understand their human rights, and by knowing these rights they will know when these rights are being violated.

*April 23, 2016*

**math **

the standard form of the equation of a parabola is y=x^2-6x+14.what is the vertex form of the equation?

*April 23, 2016*

**converting parabolic equations**

The vertex form of the equation of a parabola is x=8(y-1)^2-15. What is the standard form of the equation?

*April 23, 2016*

**converting parabolic equations**

The vertex form of the equation of a parabola is x=8(y-1)^2-15. What is the standard form of the equation?

*April 23, 2016*

**Genetics Help!!!!**

1 ) When the kinase ATM is activated after DNA damage occurs in the cell a. it can directly phosphorylate p53, which is then stabilized b. it can directly phosphorylate p53, which is then targeted for degradation by MDM2 c. it can phosphorylate the p53 gene, leading to an ...

*April 9, 2016*

**Math**

A piece of cable 85 cm long weighs 52 grams. What will a 10cm length of th same weigh?

*March 3, 2016*

**perimeter**

The screen T.V. of Bradley is 15 m 20 m. It wants to put the new cover on the screen of T.V. which costs $25 per square meter. How much the cost-t-it to cover its screen T.V.?

*February 1, 2016*

**math**

For every boy taking classes at the music school , there are 3 girls who are taking classes at the school . if there are 128 students taking classes , write and solve a proportion to predict the number of girls taking classes at the school

*October 12, 2015*

**algebra**

If the temperature was 73 degrees outside at 5:00 p.m., but it fell 19 degrees by 10:00 p.m., what is the temperature at 10:00 p.m.? Write equation and solve.

*August 29, 2015*

**math**

whats 3-7+(8+9)=

*August 21, 2015*

**Mth 156**

A company will need $35000 in 6 years for a new addition. To meet this goal the company deposits money in an account today that pays 6% annual interest compounded quarterly. Find the amount that should be invested to total $35000 in 6 years. The company should invest

*August 7, 2015*

**MTH 156**

When two gears are mashed the revolution per minutes (rpm) are inversely proportional to the number of teeth, as show below. In one machine the rpm ratio of the larger gear to the small gear is 4:7 The small gear has 216 teeth In second machine the larger gear revolves at 400 ...

*August 5, 2015*

**Math help**

Convert the repeating decimal to a/b form, where a,b are integers and b =0(there is a slash through the equal sign) 2.36(there is a line over .36)'

*August 5, 2015*

**Lemoyne Owen College**

Math- If the gas is initially at room temperature (20celsius)and is heated in an isobaric (constant pressure) processing then what will be the temperature of gas in degree Celsius when it has expanded to a volume of 0.700 m to the third power

*July 15, 2015*

**Math**

Which statements is false? A. A decimal fraction has a multiple of 10 as a denominator. B. Every rational number can be associated with a point in the real number line. C. A terminating decimal cannot be expressed as a repeating decimal. D. The set of rational numbers includes...

*July 8, 2015*

**Science**

I mean b and c

*July 8, 2015*

**Science**

I'm conflicted between b and d

*July 8, 2015*

**Science**

Scientists who study abnormal animal behavior would probably know much about A. Astronomy B. biology C. Geography D. History

*July 8, 2015*

**English**

What does "articulated with characteristic eloquence" mean? Thanks.

*July 7, 2015*

**Grammar**

thank you so much

*July 6, 2015*

**Grammar**

On many mornings, the sky is adorned with peach-and-melon-colored ribbons as a blazing SOLAR sun begins to peek over the horizon. 1) Which choice would be the most consistent with the figurative description provided elsewhere in the sentence? A. No change B. Luminous C. ...

*July 6, 2015*

**Math**

A court is 94ft long by 50ft wide. It has 3 circles each 12ft diameter. Two of the circles are at the free throw line and the third is at the center of the court. Within the 3rd circle is another circle with a radius of 2ft.The key is rectangular region on the court from the ...

*May 17, 2015*

**chemistry **

I posted my specific heat wrong. Now, how many joules is required to change temp of 225 g of lead from 5.0*C. specific heat of lead is 0.129J/g*C. I came up with 5805. It just doesnt look correct. Please help

*April 29, 2015*

**chemistry**

How many joules is required to change the temp of 225 g of lead from 5.0*C to 25*C. specific heat of lead is 0.139J/g*C. I came up with 5805 and it just doesn't look right.

*April 29, 2015*

**Algebra**

Jess saved $500 working during the summer. He plans to buy school clothes with his money. He found jeans he liked for $30 per pair, including tax, and shirts for $17, including twice. If he buys exactly twice as many shirts as jeans, how many pairs of jeans can jess buy ...

*April 28, 2015*

**chemistry **

Lithium chlorate is decomposed with heat to give lithium chloride and oxygen gas. If 2.23g of lithium chlorate is decomposed, how many milliliters of oxygen are released at stp?

*April 28, 2015*

**Math **

how to multiply1111X101 in base 2 binary

*April 15, 2015*

**Language Arts**

I use Connexus too, and I'm just so confused because my teacher wants me to define this.

*April 9, 2015*

**College**

how do you write 1.1x10 to the 5 power in a standard notation

*March 23, 2015*

**History**

How did the spread of Islam lead to golden age?

*February 27, 2015*

**Technology**

Is there a app that shuts off iPhone without pressing home or sleep button?

*February 17, 2015*

**algebra**

3200! BLESS YOUR SOUL KIND PERSON THANK YOU SO MUCH!!

*February 16, 2015*

**algebra**

how many tiles 10cm by 25cm on each side is needed for a bathroom 8m by 10m? I need help on how to solve it... I learned how to do this in 8th grade but I'm now in 10th and I forgot how to do it. I'm preparing for the highschool exit exam and I need to do this problem ...

*February 16, 2015*

**physics**

A 0.5 kg rock is projected from the edge of the top of a building with an initial velocity of 9.66 m/s at an angle of 41 degrees. The building is 10.1 m in height. At what horizontal distance, x, from the base of the building will the rock strike the ground? Assume the ground ...

*January 3, 2015*

**physics**

A ball is thrown horizontally from the top of a building 43.4 m high. The ball strikes the ground at a point 57.3 m from the base of the building. The acceleration of gravity is 9.8 m/s^2. a. Find the time the ball is in motion. Answer in units of s. b. Find the initial ...

*January 2, 2015*

**Geometry**

A marathon runner ran the first 4 miles in 27.8 minutes. If she continues running at this pace, how long will it take her to run the entire marathon of 26.2 miles?

*December 9, 2014*

**Physics Questions Help Please!**

1) The lowest tone to resonate in an open pipe of length L is 1600 Hz. What is the frequency of the lowest tone that will resonate in a closed pipe of length 2L? a) 100 Hz b) 1.60 Hz c) 200 Hz d) 0.800 kHz 2) Which of the following does not increase as a sound becomes louder? ...

*December 5, 2014*

**Algebra**

The fuel efficiency for a certain midsize car is given by E(v) = −0.017v^ + 1.462v + 3.5 where E(v)is the fuel efficiency in miles per gallon for a car traveling v miles per hour. (a) What speed will yield the maximum fuel efficiency? Round to the nearest mile per hour. ...

*December 1, 2014*

**Physics help - Waves and Sound Questions**

1) A 1.50-m long gas column that is open at one end and closed at the other has a fundamental resonant frequency 80.0 Hz. What is the sound speed in this gas? a) 120 m/s b) 30.0 m/s c) 480 m/s d) 213 m/s e) 53.3 m/s 2) You drop a stone down a well. You hear the splash 2.23 s ...

*November 25, 2014*

**physical science**

A 3Kg bar of aluminum has to be heated form 25 degreesC to 75 degreesC . how many calories are needed to achieve this temperature increase?

*November 18, 2014*

**Algebra**

The number of bass in a lake is given by P(t) = 2800/1 + 6e^−0.05t where t is the number of months that have passed since the lake was stocked with bass. (a) How many bass were in the lake immediately after it was stocked? 400 bass (b) How many bass were in the lake 1 ...

*November 17, 2014*

**Math**

Jack has 5 apples Sahara has 13 apples. They each got the same amount times the number they already have. How much apples does jack and Sahara have now.

*November 17, 2014*

**Physics help **

A blacksmith at a historical reenactment is making an iron hinge. after placing the iron (0.750 kg) in the fire and shaping it with his hammer it is still at 200 C. he puts the iron piece in an 8 L bucket of water at 25 C. what is the final temp. of the iron (assume it is in ...

*November 13, 2014*

**Physics Help Please!**

an isolated container holding 5 kg of sulfuric acid is at 60 C. if 2.49x10^5 Joules of energy were transferred out of the acid, what would be the new temp. of the acid?

*November 13, 2014*

**chemistry**

the frequency factor and activation energy for a chemical reaction ate A=4.8 x 10^-12cm^3 and Ea=11.1kJ/mol at 327 K respectively. Determine the rate constant for this reaction at 327K

*November 11, 2014*

**Physics help please **

A blacksmith at a historical reenactment is making an iron hinge. after placing the iron (0.750 kg) in the fire and shaping it with his hammer it is still at 200 C. he puts the iron piece in an 8 L bucket of water at 25 C. what is the final temp. of the iron (assume it is in ...

*November 7, 2014*

**Physics Help Please!**

A block of mass is moving along the horizontal frictionless surface with a speed of 5.70 m/s. If the slope is 11.0° and the coefficient of kinetic friction between the block and the incline is 0.260, how far does the block travel up the incline? Show step by step please! ...

*November 5, 2014*

**Algebra**

Sorry, but I did not post my question twice.

*November 4, 2014*

**Algebra**

A veterinarian uses 300 feet of chain-link fencing to enclose a rectangular region and also to subdivide the region into two smaller rectangular regions by placing a fence parallel to one of the sides, as shown in the figure. (a) Write the width w as a function of the length l...

*November 4, 2014*

**math**

write an equation to represent the statement"four less than the product of three and x is twenty-three" 3x - 4= 23 4x - 3x = 23 4x - 3 = 23 3 - 4x = 23

*November 3, 2014*

**chemistry**

The antacid in question (with an active ingredient of Ca(HCO3)2), upon treatment with excess hydrochloric acid, a 0.413 g sample gives 92.85 mL of CO2 at 25.00oC and 1.000 atm. What percentage of the antacid is active ingredient? Assume a perfect system (i.e. the yield is 100%)

*November 1, 2014*

**chemistry**

a 0.96 millimole sample of Na2CO3 gave 0.9 millimoles of CO2 gas. If a 0.376 g of pure Na2CO3 was reacted with excess acid, what volume of gas will be measured on this apparatus

*November 1, 2014*

**Chem Help**

what is meant by the following question give a detailed experiment design for the conversion of 2-methyl-2-butanol to 2-methyl-2-butene on the 0.2 molar scale. I dont need help with the experimental design I just didnt understand what is meant by 0.2 molar scale. thanks!

*October 29, 2014*

**Organic Chem Help Please!**

if you used 40 g of cyclohexanol and obtained 24.6g of pure cyclohexene, a) what is your w/w yield? b) what is your theory yield? Thank you !

*October 29, 2014*

**Chem Help Please!**

Explain why the stability of alkyl carbocations is: tertiary > secondary > primary > methyl Thanks!

*October 21, 2014*

**Pre-Calc**

A point on the terminal side of an angel theta is given. Find the exact value of the indicated trigometric function (-1/5,1/2 ) find cos theta

*October 20, 2014*

**Physics Help Please!!!! Check!**

if I weigh N on Earth and 5320 N on the surface of a planet, what is the acceleration due to gravity on that planet? mg=702N m=702/9.8=71.6 kg mg=5320N g=5320/71.6=74.3 m/s^2

*October 17, 2014*

**Physics Help Please!!!! Urgent!!**

1) A 10 kg lead brick rests on a wooden table. if a force of 46N is required to slide the brick across the table at a constant velocity, what is the coefficient of friction? 2) A horizontal force of 100N is applied to a 200 kg refrigerator sitting on a horizontal surface. the ...

*October 16, 2014*

**Chem Help Please!**

Give the full mechanism for the reaction of 1-bromo-3-methylpentane with methanol. I know you cant draw on here. but can you tell write it out with words? Thanks!

*October 14, 2014*

**6th grade math**

Hi I'm a parent and I'm trying my best to help my son but I need help. The problem is... Find two positive decimals a and b that make the following statement true. Then find two positive decimals a and b that make the statement false. If a < 1 and b < 1, then a ...

*September 17, 2014*

**Organic chem Extraction of caffeine from tea**

What is the name used for the mixture of the upper and lower layers that did not completely separate when you allowed the mixture to settle? What type of compound could cause the layers not to separate cleanly? If you obtained a poor separation of your phases, suggest two ...

*September 16, 2014*

**Physics Help Urgent Please!!!**

A crane is used to lift air conditioning units to the top of a 5-story building. Each story is 3.5 m high. The crane accelerates the units while lifting the units past the first story and then lifts them at a constant velocity past the second through fourth stories. it hen ...

*September 15, 2014*

**Physics Help**

An industrial die machine is used to stamp out holes in pieces of sheet aluminum. the die strikes the surface of the street of metal at a speed of 10 m/s, passes through the 0.635 cm thick sheet, reverses its direction, and is again moving at 10 m/s as it passes the top ...

*September 14, 2014*

**Physics Need Help**

The pile driver struck the piling with a speed of 20 m/s. At what height did the pile driver hammer have to be lifted for it to fall freely and attain that speed before striking the piling? Show steps please!!!

*September 14, 2014*

**2**

11.05

*September 11, 2014*

**Science**

igual donde kmox

*September 8, 2014*

**Math**

A dress is on sale for a 15% discount, meaning 85% of the price remains. If the sale price of the dress is $51, then the original price of the dress was $.

*June 30, 2014*

**english 2**

You should probably try looking the example essay in the textbook. Then try and see what you can come up with.

*June 26, 2014*

**English! - Help!**

Everyone is say they got a hundred but I am confused. 8 and 9 both look like they should C. For example problem 9 in The Gift of the Magi, the author is compassionate and ironic. He is not condescending? Yet, everyone is say they got a 100 with the answers b and a. Anyone have...

*June 3, 2014*

**Sciene**

Is Meiosis actually Mitosis happening twice? My answer- Yes because they are both a cell division process.

*May 10, 2014*

**statistics**

A quality supervisor for a factory that makes cell phone cases examines a sample of 46 cases. She finds that 8 cases are the wrong size. Which is the best prediction of the number of cases that will be the wrong size in a shipment of 3,000? A.)410 B.)475 C.)506 D.)522

*May 7, 2014*

**Math**

The regular pentagon have a perimeter of 18.8 units. What is the value of X?

*April 12, 2014*

**spanish**

Using the subject “usted” and the verb in the imperative, tell your instructor three things she or he must do. Then tell your instructor two things she or he must not do. You will be graded on accuracy and pronunciation. Provide your sentences in Spanish.

*April 7, 2014*

**spanish**

Usted debe corregir las pruebas. Usted tiene que darme más tiempo. Usted debe ir con nosotros. Usted no debe mascar chicle. Usted no tiene porqué hacerlo, que lo hagan ellos.

*April 7, 2014*

**Calculus**

The amount of carbon-14 still present in a sample after t years is given by the function where C0 is the initial amount. Estimate the age of a sample of wood discovered by an archeologist if the carbon level in the sample is only 18% of its original carbon-14 level.

*March 26, 2014*

**Calculus**

If 40 milligrams of strontium-90 radioactively decays to 12 milligrams in 30 years, find its half-life (the number of years it takes until half of it remains). Use the formula A = p ⋅ e−kt, where p is the amount and A the (smaller) final amount.

*March 26, 2014*

**english**

So, the correct answer is A

*March 21, 2014*

**english**

Which one of the following is a correct example of the singular possessive case? A. king's rights B. audiences' reaction C. women's club D. who's job I think it's C.

*March 21, 2014*

**Statistics **

1. A sports researcher gave a standard written test of eating habits to 12 randomly selected professionals, four each from baseball, football, and basketball. The results were as follows: Eating Habits Scores Baseball Players Football Players Basketball Players 34 27 35 18 28 ...

*March 20, 2014*

**Calculus Help Please!!! **

Find an equation of the tangent line to the curve at the given point. ((pi/6),(2 square root of (3)/3)) y = sec (x)

*March 20, 2014*

**I got the answer **

Thank you!

*March 16, 2014*

**Calculus Help**

Use logarithmic differentiation to find the derivative of the function. y = (tan x)^(7/x)

*March 16, 2014*

**Calculus Help Damon**

Use implicit diff. to find dy/dx of each of the following. This is the question

*March 13, 2014*

**Calculus Help **

In the following x,y and (a) are all variables. Show steps please! Thank you! 1) y^2 = x^2+a^2 2) y^2+ay = x^2+ax+a^2

*March 13, 2014*

**Math**

A 6ft. person casts a 4ft. shadow. Next to the person, a lamppost casts a 30ft. shadow. How tall is the lamppost?

*March 6, 2014*

**English**

Read the conversation at a peer review for Ben’s short story. “It seems your central character has a really cool power: being able to hear what others are thinking,” Tom said. “Actually, I think it was more of a jinx,” replied Ben. “Being able to ...

*February 9, 2014*

**physics**

Two buses leave downtown one is headed southwest the other is headed northeast. Do they have the same velocity? Why or why not?

*February 7, 2014*

**math**

how do I arrange these fraction or mixed numbers in order from smallest to largest 1)5/6,5/7,-3/4,2/3,9/11,-3/7 and 2)2 1/2, -7/2,-2 1/3,2 4/5,2 3/8.

*December 22, 2013*

**Math**

A group of students went.to their favorite restaurant after the football game one friday night

*December 8, 2013*

**civics**

In modern society, what do we mean when we refer to the dividion of labor? A} the specializatoon of jobs in tthe medical field B}splitting work equally between two people C{all the jobs peopkle do are connected to other jobs D} the ways joconstruction jobs are organized I ...

*November 28, 2013*