# Posts by mohammed

Total # Posts: 126

**Math**

Y=x^2_2

**Physics**

Thank you very much for your help with this question Bob!

**Physics**

Do the electrons in an ion of nitrogen (such as N+ or N+2) have exactly the same permitted energy levels the electrons in a neutral nitrogen atom, and therefore, same absorption and emission lines?

**math**

a rectangle is three times ad long as its breadth. if the perimeter of rectangle is 40m, find its length and breadth

**physics**

The motion of the truck is described by the equation V = 50t – 5t^2.Find: a.Value from t = 1.5 s to t = 5.0 s. b.Vinst at t = 3.0 s.

**physics**

What is the effect of increasing the inclination of the track to the acceleration of the rider in the experiment?

**physics**

Is the motion of the rider for each angle of inclination uniformly accelerated? Why or why not?

**physics**

describe the shape of the graph made and discuss its significance.

**physics**

From the graph made, compute for the instantaneous acceleration of the rider for each inclination at any chosen time by computing for the slop of the tangent line?

**science**

what is the specific heat of aluminum if temperature of a 28.4g sample of aluminum is increased by 8.1 c° when 207J og heat is added

**Differential calculus**

reservoir has the shape of a right-circular cone. The altitude is 10 feet, and the radius of the base is 4 ft. Water is poured into the reservoir at a constant rate of 5 cubic feet per minute. How fast is the water level rising when the depth of the water is 5 feet?

**Differential calculus**

A ladder 20 ft long leans against a vertical wall, If top slides downward at the rate of 2 ft/sec, find how fast the lower end is moving when it is 16 ft from the wall.

**Differential calculus**

A light is placed on the ground 30 ft from a building. A man 6 ft tall walks from the light toward the building at the rate of 5 ft/sec. Find the rate at which the length of his shadow is changing when he is 15 ft from the building.

**Differential calculus**

Find the most economical proportions for a covered box of fixed volume whose base is a rectangle with one side three times the other.

**Differential calculus**

A piece of wire of length 2 m. is cut into two parts, one of which is bent into the shape of a square and the other into a shape of a circle. How should the wire be cut so that sum of the enclosed areas is minimum.

**Differential calculus**

Sketch the graph of the curve y=(x-2)(x+1)(x+3)

**Differential calculus**

Find the equation of the parabola w/ v(3,-4) and with directrix y=0.

**Differential calculus**

Find the equation of the parabola w/ v(3,-4) and with directrix y=0.

**Differential calculus**

Find the equation of the parabola w/ v(3,-4) and with directrix y=0.

**Differential calculus**

y=(√e^x)/x

**Differential calculus**

Differentiate the following y=root(e^x)/x

**Differential calculus with analytic geometry**

use implicit differentiation to find dy/dx. xy^2+4y^3=x-2y

**trigonometric**

a tower 61 m high is located 44 meters from a tall tree.from the top of the tree.the angle of elevation to the tower is 36 degrees. how tall is the tree?

**Trigonometry**

Solve the equation 6sin^2 x-sin x=0 , if x belongs to the half open interval [0,2 ).

**Trigonometry**

A luxury ship left the port and cruised for 7 miles at a heading of 38 degrees. It then cruised for 24 miles heading of 128 degrees and stopped. How far was the ship now located from the port?

**Chemistry**

A saturated solution of lead ii trioxonitrte v was prepared at 22degree Celsius at 27cm3 of this solution required 46cm3 of NaCl solution containing 96gdm3 for complete precipitation. Find the solubility of the lead in trioxonitrte v at 22degree Celsius in (a) mol/dm3 (b) g/dm3.

**Bn**

(a) A luggage carousel at an airport has the form of a section of a large cone, steadily rotating about its vertical axis. Its metallic surface slopes downward toward the outside, making an angle of 29.0° with the horizontal. A piece of luggage having mass 30.0 kg is ...

**Organic Chemistry**

Hello, I have done an experiment in Organic Chemistry called :SN1 Reaction: Synthesis of t-amyl chloride from t-amyl alcohol, there are some questions that I am unsure about, 1) What are the 2 rules of HCl in this reaction? Can you use NaCl instead of HCl to synthesize t-amyl ...

**Chemistry**

What will be the volume of ammonia formed from 2L of nitrogen and 2L of hydrogen

**physics**

The vector position of a particle varies in time according to the expression r with arrow = 6.60 i − 9.00t2 j where r with arrow is in meters and t is in seconds. (a) Find an expression for the velocity of the particle as a function of time. (Use any variable or symbol ...

**civic**

what are the local civic problems

**math**

If Sally can paint a house in 4 hours, and John can paint the same house in 6 hours, how long will it take both of them to paint the house together? > I know the answer, but I do not know what is the name of the methods. EX: 1/n= 1/4 + 1/6 1/n =5/12 n= 12/5

**Math**

In a bag of red and black jellybeans 136 are red jb and the remaining r black jb if 15% of the jellybeans in the bag are black whatis the total number of jelly beans in bag A) 151 B 175 C) 175 D 200 E 906

**Math**

A stero was discounted by 20 % and sold at the discount price of $256 which of the following equals the price of the stereo before the discount

**Algebra**

Wilma drove at an average speed of 35 mi/h from her home in City A to visit her sister in City B. She stayed in City B 25 hours, and on the trip back averaged 55 mi/h. She returned home 40 hours after leaving. How many miles is City A from City B

**algebra**

Eleven fewer than eight times a number is 117

**Social Studies**

thank you very much Ms. Sue :)

**Social Studies**

Canada

**Social Studies**

im doing research paper on that aboriginals have the right to self government. discuss. i need to do citations in paper, and im trying to look for 5 or 6 good websites i can do citations from and paraphrase. if you know of any good sites please post. thanks. also I am agreeing...

**Math**

Neil needs to cut 3 long boards into 9 smaller boards. The first is 10 ft, the second is 16 ft, and third is 18 ft. The table lists the smaller boards Neil needs. Use a drawing to show how he can divide the 3 boards so there is no waste.

**math**

yes

**Pre Calculus**

99609

**chemistry**

rank the following elements by electron affinity, from most positive to most negative ea value, bismuth,neon,fluorine,cesium,oxygen

**physics**

A 36-N force, parallel to the incline, is required to push a certain crate at a velocity of 9.1 up a frictionless incline that is 45° above the horizontal. The mass of the crate is:

**Pre Med Major**

ok Ms Sue.

**Pre Med Major**

Hi. I am an accounting major. Is there anyway I can finish my accounting degree and still finish the pre med requirements in 4 years? Can an Accounting major become a MD? I know about MCAT and everything.

**math**

Nine hundred Thirteen Thousand

**L.o**

Four factors that could threaten or limit the core functions of the media

**physical**

A 2500‐kg vehicle traveling at 25 m/s can be stopped by gently applying the breaks for 20 seconds. What is the average force supplied by the breaks to stop the vehicle?

**biology**

what is hypertonic and how does it happen

**biology**

what is the hypertonic hypotonic isotonic ,

**Math**

to make an equal

**English ms sue**

how to write autobiographical

**algebra**

a=l*w 44=3-2x , 2x=44-3, 2x=39

**Math**

5*25/12=125/10

**SAT**

thank you both. I will learn english first.

**SAT**

Please help me. I am a foreign boy. English is not my first language. I find the SAT questions too tough. In my home land we did not learn much english in high school. How can I pass the SAT with a good score?

**SAT**

@bobpursley thank you sir.

**SAT**

please help. I am a foreigner. I need to get into a US college for a bright future. I bought the College Board SAT book. It has no word lists. How do I do well in the SAT? Any tips? Please give me help.

**Social Studies**

i came across those sites but they don't give free printables or answer keys

**Social Studies**

They are studying longitude and latitude and about Canada

**Social Studies**

I trying to help my younger siblings with their work so i want to print out some worksheets from a website that have answer keys but i cant find any online, if you can give me a link to some that would be great.

**Phyics**

1250

**GED**

Is the English Writing test the most difficult GED test? I find Math easy. Am I required to memorize the Science and Social Studies? or will I be provided information and is the Science and Social Studies actually a reading test? Thank You in Advance.

**Chemistry**

I'm so sorry for bothering you, but the answer still wrong. It says that this is similar to the amount of fertilizer in the river water, but the amount of nitrogen will be less. So, what percent of the total mass of the fertilizer is nitrogen? Thanks,

**Chemistry**

I know that. I already used these steps, but the answer was wrong.

**Chemistry**

A farmer applies 1400.0 kg of a fertilizer that contains 10.0% nitrogen to his fields each year. fifteen (15.0%) percent of the fertilizer washes into a river that runs through the farm. If the river flows at an average rate of 0.410 cubic feet per second, what is the ...

**Math**

A basketball team won 10 of its first 20 games. If then won its next 5 games. What fractional part of its total number of games did it win?

**Math**

A basketball team won 10 of its first 20 games. If then won its next 5 games. What fractional part of its total number of games did it win?

**maths**

A man travels from town a to b at an average speed of 90km/h.on his return journey he takes (one)1 hour less and his speed is 10km/h faster......1.how far apart are towns a and b, ............. ..2.what Is his average speed from town a to b and back to a ..

**English Please help**

Thank You

**English Please help**

8. Neither of the glasses _________ full of juice. were weren't *was wasn't 9. In the living room _________ many interesting pieces of art. is isn't *are aren't Thank You

**english Please check answer**

Thank You

**english Please check answer**

10. In a research proposal, your sources should not have the potential to answer research questions. A.) true *B.) false Thank You

**Physics**

Final momentum = Initial Momentum (2561+823)(8.5) = 2561V + 823(0) (3384)(8.5) = 2561V 28764 = 2561V 11.23m/s = V

**camestry**

Calculate the number of grams of calcium chloride (CaCl2) needed to react with excess silver nitrate (AgNO3) to produce 6.60 g of silver chloride (AgCl). The equation for the reaction is given below: CaCl2 + 2AgNO3 → 2AgCl + Ca(NO3)2

**literary**

a connecticut yankee is episodic true or false

**literary**

IN THE 19TH CENTURY HANK MORGAN IS A MIDDLE CLASS a newspaper b cowboy c enginner

**Math**

a carpenter cut a 3- meter board into four pieces of equal length . how many centimeters long was each piece?

**Finance**

1. Hyundai Corporation plans to issue 4-year bonds with a par value of $1,000 that will pay $50 every year. The firm will issue these bonds to the buyers at $840 each. (6 points) a. Compute the before-tax cost of debt. (Hint: Try solving this like you solve for IRR; i.e. try 5...

**physics**

a person with a mass of 40 kg runs up a flight of stairs in 12 seconds the flight has 20 steps and the height of each step is 20cm

**calculus**

thanks for helping me

**calculus**

16sinx/x if x <0 f(x)= a if x=0 bcosx if x>0

**calculus**

Determine values of a and b that make the given function continuous . 16sinx÷x f(x)= a bcosx It's a bicewise function

**physics**

270-30=240

**4th grade Math Help**

Mr.brooks brought a box of 66 acorns to class can he give 3 acorns to each of the 23 students in his class why or why not

**PHYSICS PLEASE HELP!!**

caculate the k.e of car with mass of 50kg and velocity of 10m/s

**physics**

Vector is 6.0 units long and points along the negative axis. Vector is 8.5 units long and points at 40 to the positive axis

**chemistry**

A crucible containing potassium chlorate has a mass is 24.426 g. The crucible is heated according to the lab procedure for this week's experiment and is found to weigh 23.642 g. Write an equation for the reaction and, assuming that all the chlorate decomposed, calculate ...

**physics**

i think it will not be able. because Vf^2=-197500 m/s according to this relation Vf^2=Vi^2+2ax while x=0.2m, vi= 450 m/s , a=-10^6 m/s^2 is it right or not?

**physics**

A bullet is fired with a speed of 450 m/s through a board 20cm thick. If the bullet is subject to a large deceleration of magnitude 10^6m/s^2, will the bullet be able to emerge from the other side of the board.?

**physics**

A bullet is fired with a speed of 450 m/s through a board 20cm thick. If the bullet is subject to a large deceleration of magnitude 10^6m/s^2, will the bullet be able to emerge from the other side of the board.?

**Math problems**

p stands for pence

**Math problems**

i am an odd multiple of 50p, my number of pounds is double 18

**Math problems Help Please!!!!!!**

i am a four-digit number with the digits in order. my first two digits are the first two odd numbers. my last two digits are the last two single-digit even numbers

**Math problems**

i am a four-digit number with the digits in order. my first two digits are the first two odd numbers. my last two digits are the last two single-digit even numbers PLEASE HELP

**Math problems**

i am two numbers, the sum of my numbers is 1000, the diffrence between my two numbers is 100

**math problems**

what is a number that is between 200- 700 three digit multiple of 10 and divisible by 8 and 9

**science**

the consentration of Sr(OH)2 I S 0.02 WHAT IS THE CONSENTRATION OF OH ASSUMING COMPLETE DISSOCIATION

**Business**

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