Monday

December 5, 2016
Total # Posts: 935

**physics**

When the wind is blowing an average of 31.8 mph, a wind tower with its propellors centered at a height of 80 m off the ground is supplied with energy at a rate of 14.4 kW. A large bank of batteries collects the energy from the wind tower. If the efficiency of each object (...

*November 28, 2016*

**Physics**

I guess more people are asking the same question right now, because early, there was nothing.

*October 6, 2016*

**Physics**

I have tried and I did not find anything.

*October 6, 2016*

**Physics**

What is the escape speed of an electron launched from the surface of a 1.5 cm diameter glass sphere that has been charged to 10 nC? Which equation(s) would I use?

*October 6, 2016*

**Algebra 1**

Thanks Reiny.

*September 29, 2016*

**Algebra 1**

Another question. An investment account earns 4% per year compounded annually. If the initial investment was $4,000.00, how much is in the account after 3 years? Round your answer to the nearest dollar.

*September 29, 2016*

**Algebra 1**

So is #1 wrong?

*September 29, 2016*

**Algebra 1**

I am having trouble with a few questions....Wondering if you could help...My answers have the *** by them..... 1. A lab is growing bacteria in a culture dish. The amount of bacteria in the dish doubles every 3 hours. Initially, there are 500 bacteria in the dish. How many are ...

*September 29, 2016*

**Physics**

A tennis player hits a ball 1.6m above the ground. The ball leaves the racket with a speed of 12m/s at an angle 8.0 above the horizontal. The net is a horizontal distance of 7.0m away from the player and is 1.0m high. a) does the ball clear the net? Explain how you determined ...

*September 19, 2016*

**Math**

How much feet will u need if the diameter is 4 feet around a circular garden

*September 12, 2016*

**Physics**

Do you cross multiply the fractions? I got 3p^2-43p=148.75 Is this right?

*August 29, 2016*

**Physics**

At which point or points is the electric field zero in figure? I can not post the picture, but this is what it looks like: 1 2 3 4(4+)5 6(-)7 8 9 10 The (4+) is a proton with 4 charges. The (-) is an electron with 1 charge. They are on a number line 1-10. The proton is between...

*August 29, 2016*

**Physics**

Space explorers discover an 8.7×10^17kg asteroid that happens to have a positive charge of 4400 C. They would like to place their 3.3×10^5kg spaceship in orbit around the asteroid. Interestingly, the solar wind has given their spaceship a charge of -1.2C. What ...

*August 25, 2016*

**Physics**

No, we have not covered Thrust. Thank you for your help.

*August 24, 2016*

**Physics**

Starting from rest, a 2500 kg helicopter accelerates straight up at a constant 1.7 m/s2. What is the helicopter's height at the moment its blades are providing an upward force of 29 kN? The helicopter can be modeled as a 2.6-m-diameter sphere. How do you start this ...

*August 24, 2016*

**Algebra**

Let P0 = $1000.00. • k = 0.5% = _____0.005______ as a decimal. Compute and explain how to find the doubling time. Then, write the compound interest equation for this value of k and the 3 values for t. Number of years Equation New Value 1 P(1)=$1000e^(0.005)(1) 5 P(5)=$...

*June 28, 2016*

**math**

(3/5 p) + 17 = 68

*May 20, 2016*

**Pre-Algebra**

3/5p+17=68

*May 8, 2016*

**geometry**

Line AB is parallel to line CD. What is the sum of the measure of angle K and the measure of angle Y?

*April 5, 2016*

**Geography**

unscramble these words risut its a type of watch

*March 22, 2016*

**Math**

How many square feet of tile would be needed to cover the area of a room 14 feet long and 12 feet wide?

*March 2, 2016*

**Gen Chem**

A mixture of NaCl and sucrose (C12H22O11) of combined mass 10.2 g is dissolved in enough water to make up a 250 mL solution. The osmotic pressure of the solution is 8.29 atm at 23°C. Calculate the mass percent of NaCl in the mixture.

*February 4, 2016*

**Math**

The diameter of a soup can is 7cm. The label wraps around the can. About how many centimeters long must the label be to go all the way around the soup can?(use 22/7 for pi) explain how to mentally check whether your answer is reasonable.

*February 3, 2016*

**Math**

Suppose f(x)=x^(3)−3 What is the average rate of change of f(x) with respect to x as x changes from 1 to 1+h? The AROC is?

*January 21, 2016*

**Math**

I think so

*January 17, 2016*

**Math**

Forty percent of the 20 seats on the bus were occupied. Write 40% as a reduced fraction. Then find the number of seats that were occupied.

*January 17, 2016*

**math**

How many different rectangular gardens can you make, whose dimensions are whole numbers, if you have 48 m. Of fencing materials and the width is at least 4 m? Consider a 6m by 18m rectangle the same as an 18m by 6m rectangle.

*January 5, 2016*

**Math**

Shannon bought 9 pounds of almonds for a total cost of $27. The cost per pound of cashews is 70% more than the cost of almonds. Shannon bought enough cashews that when she mixed them with the almonds the cost was $4.00 per pound. What percent of the mixture by weight was ...

*January 4, 2016*

**math **

The table shows the outputs y for different inputs x: Input (x) 3 7 11 15 Output (y) 4 6 8 10 Part A: Do the data in this table represent a function? Justify your answer. (3 points) Part B: Compare the data in the table with the relation f(x) = 5x – 21. Which relation has...

*December 3, 2015*

**English**

So, the subject is fried rice??

*November 19, 2015*

**English**

I really don't know. I'm so lost.

*November 19, 2015*

**English**

That container of fried rice has spent six weeks in the back of the refrigerator. I need help finding the complete subject and the simple subject.

*November 19, 2015*

**5th grade math**

thanks Madi and Ms. Sue, I worked it out and came up with the right answers. Appreciate you

*November 18, 2015*

**5th grade math**

A class of 32 students voted on their favorite colors. 1/4 students said green is their favorite, 3/8 said red, the rest said orange. What fraction of students said their favorite color is orange and how many voted for each color. very confusing please help solve

*November 18, 2015*

**Physics 101**

A carousel has a diameter of 10 m. How far (path length) does little Joey, strapped in at the very edge of the carousel, travel if the carousel is rotated through angle of 45 degrees, 45 rad and 45 rev, respectively?

*November 12, 2015*

**Math **

A class of 30 voted on their favorite sport. 1/3 said soccer, 2/3 said basketb. the rest said their favorite is football. what fraction of students favorite sport is football!!! please help

*November 9, 2015*

**Physics**

A jet aircraft is flying due south at 300 m/s at a place where the earth’s magnetic field is 80 µT. Find the potential difference between the wing tips if they are 25 m apart. Which tip has the higher potential?

*November 4, 2015*

**Statistics**

How is question 2= 0.754?

*October 19, 2015*

**Chemistry**

4. A 9.25 g sample of sodium reacts completely with sulfur to form a compound with a weight of 15.75 g. I have no clue how to do this problem will some please explain it to me thank you

*October 15, 2015*

**Finance **

Could someone tell me how to calculate this in excel? You are applying for a 30-year, fixed-rate (APR 6.50%), monthly-payment-required mortgage loan for a house that sells for $80,000 today. The mortgage bank will ask you for 20% initial down payment (in cash, paid immediately...

*October 2, 2015*

**chemistry**

A chemist determined by measurements that 0.0850 moles of mercury participated in a chemical reaction. Calculate the mass of mercury that participated in the chemical reaction. Round your answer to 3 significant digits.

*October 1, 2015*

**Chemistry**

Calculate the moles of aqueous calcium carbonate present in a 50.00mL sample of a calcium carbonate standard solution, assuming the standard is known to have a hardness of 125 ppm (hardness due to CaCO3). You can assume that the density of the sample is 1.000 g/mL and the ...

*September 25, 2015*

**Algebra I**

I got the following question but since I haven't reached a definite answer I'm wonder if I've solved it correctly: Write the slope-intercept form of an equation of the line that passes through (-2,5) and has an undefined slope. I got: 5=-2m+b 5--2m=b 5+2m=b is the ...

*September 22, 2015*

**physics**

v= 75.6 v=u+at at= 6.35 x 4.45= 28.26 75.6 - 28.26 = u = 47.34 v^2=u^2+2as 75.6^2 = 47.34^2+(2 x 6.35 x s) 5715.36-2241.08=12.7 x s 3474.27/12.7= s (answer is in rad)

*June 28, 2015*

**math algabra **

The area of the living room is 162 ft2. What are the length and width if the width is twice the length

*June 2, 2015*

**geometry**

the track rises 1 foot for every 11 feet run. find the measure of the angle formed by the track and ground level

*May 6, 2015*

**math 1**

jake wanted to measure the length, l, of the pond,so he drew this diagram of two similar triangles. what is the approximate length, l, of the pond

*May 2, 2015*

**Chemistry**

What mass of oxygen is needed for the complete combustion of 2.10×10−3g of methane? Express your answer with the appropriate units.

*April 14, 2015*

**Chemistry**

What mass of water is produced from the complete combustion of 2.10×10−3g of methane? Express your answer with the appropriate units.

*April 14, 2015*

**Chemistry**

What mass of carbon dioxide is produced from the complete combustion of 2.10×10−3g of methane? Express your answer with the appropriate units.

*April 14, 2015*

**Chemistry**

Consider the reaction 2D2(g)+O2(g)→2D2O(l) What is the mass of heavy water, D2O(l), produced when 7.65g of O2(g) reacts with excess D2(g)? Express your answer with the appropriate units.

*April 14, 2015*

**Chemistry**

Balance the given chemical equation using whole-number coefficients. ?D2(g)+?O2(g)→?D2O(l) Enter the coefficients in order separated by commas (e.g., 1,3,2, where 1 indicates the lack of a coefficient).

*April 14, 2015*

**Chemistry**

How many molecules (not moles) of NH3 are produced from 1.17×10−4g of H2? Express your answer numerically as the number of molecules.

*April 14, 2015*

**Chemistry**

How many grams of H2 are needed to produce 11.80g of NH3? Express your answer numerically in grams.

*April 14, 2015*

**Chemistry **

In the Sandwich Shop, select the "Cheese sandwich" option and observe the equation given for the preparation of a cheese sandwich. In the equation, set the number of bread slices to "2" and the number of cheese slices to "1." You will see that the...

*April 14, 2015*

**Chemistry**

Find the number of moles of water that can be formed if you have 226mol of hydrogen gas and 108mol of oxygen gas. Express your answer with the appropriate units.

*April 14, 2015*

**probability**

a coin is flipped fifteen times how many elements are in the equally- likely sample space? how many different events exist? what is the probability of at most a head occurring? what are the odds at least one head OCCURS

*April 12, 2015*

**math**

five hundred raffle tickets are sold for $2 each. one prize of $400 is to be awarded. raul purchases one ticket. what is his expected value and fair price of the ticket.

*April 12, 2015*

**science (chemistry)**

why does the pH of the acid solution initially increase very slowly when metal is first added to the acid solution, but gradually increase at a faster rate as the reaction proceeds to completion? I thought it may be because the metal is just then being completely dissolved but...

*April 8, 2015*

**Physics 1**

A rotating cylinder about 5.0 miles in diameter is designed to be used as a space colony. With what tangential velocity must it rotate so that the residents on it will experience the same acceleration as that due to gravity on Earth? Recall that ag=g=-9.8 m/s^2 and 1 mi=1609 m...

*April 7, 2015*

**Marketing reserch**

a marketing researcher analyzing the fast food industry noticed the following restaurant in Cali was 3.30 with a standard deviation of .40. yet in Georgia the average amount spent at a fast food restaurant was 3.25 with a standard deviation of .10. what do these statistics ...

*March 30, 2015*

**math**

The sum of two consecutive integers is –49. Write an equation that models this situation and find the values of the two integers.

*March 19, 2015*

**English **

I need help with my essay for the book things fall apart The prompt is: what happens when different cultures collide. I don't know how to actually do an essay I need an attention grabber, connector, thesis so basically a ACT also like a melcon I don't know where to ...

*March 18, 2015*

**Calculus**

-cosx+2

*March 15, 2015*

**Social Studies**

In Chinese society, the merchant ranked below the.. A. farmers & aristocrats*** B. landowners & traders C. aristocrats & priests D. bankers & farmers*** I think it might be either A or D

*February 23, 2015*

**Physics 1**

Monique has a mass of 46 kg and she is sitting on a swing that hangs 0.50 m above the ground. Pierre pulls the swing back and releases it when the seat is 1.40 m above the ground. How fast is Monique moving when the swing passes through its lowest point? The answer is 4.2m/s, ...

*February 15, 2015*

**college algebra**

Solve the equation with rational exponents. (X-1)^2/3=36

*February 8, 2015*

**Physics**

A cannonball is shot upwards with a total velocity of 61.0 m/s at an angle of 45 degrees from the horizontal. What will its total velocity be when it has moved 345 m horizontally from where it started?

*February 1, 2015*

**Physics**

By trial and error, a frog learns that it can leap a maximum horizontal distance of 1.26 m. If, in the course of an hour, the frog spends 27.5 % of the time resting and 72.5 % of the time performing identical jumps of that maximum length, in a straight line, what is the ...

*January 29, 2015*

**P.E**

answers PLEASE

*December 16, 2014*

**pharmaceutical math**

You need to prepare 180g of a 10% cream using 30% stock cream and a cream base. How much is needed for each

*December 10, 2014*

**pharmaceutical technology **

If you add 16g of salicyic acid to 84g of an ointment base what is the final concentration w/w of the product

*December 10, 2014*

**Math**

Do you know why. Street. Runs

*November 29, 2014*

**History**

How would be a good way to make an persuasive essay on Immigration Reform in the United States??????? I need an answer tonight if possible.

*November 28, 2014*

**chemistry**

what is the molality of 18 g NaCl in 200 g of H2O?

*November 25, 2014*

**Math **

A savings account at Xyz bank offers 4% interest, compounded annually. How much money must I invest today in order for the account to grow to $5,000 in ten years? Answer to the nearest whole dollar.

*November 21, 2014*

**Inverses of functions**

−9+f−1(a−1)=−12 f(−3)=2

*November 12, 2014*

**Chemistry**

What mass (in grams) of sodium chloride, NaCl, is needed to make 422. g of a 3.39%(m/m) NaCl solution? (atomic masses: Na = 22.99, Cl = 35.45)

*November 7, 2014*

**Physics **

A large grinding wheel in the shape of a solid cylinder of radius 0.330 m is free to rotate on a frictionless, vertical axle. A constant tangential force of 200 N applied to its edge causes the wheel to have an angular acceleration of 1.048 rad/s2. (a) What is the moment of ...

*October 28, 2014*

**Physics **

The four masses shown in the figure below are connected by massless, rigid rods. moi-cog-problem-fig (a) Find the coordinates of the center of gravity of this object if MA = 120 g and MB = MC = MD = 180 g x = ? m y = ? m (b) Find the moment of inertia about an axis that passes...

*October 28, 2014*

**geometry**

QRST is a trapezoid. If angle S is equal to 23 degrees, what is the measure of angle T

*October 20, 2014*

**Math**

(pi/4,3)=(x,y) d/dx 3cot^4x= 12cot^3x d/dx cotx= -csc^x d/dx x=1 (12cot^3x)(-csc^2x)(1) m=-12cot^3xcsc^2x equation to the tangent line would be y-3=-12cot^3xcsc^2x(x-pi/4) ?

*October 2, 2014*

**Math**

Find the equation of the tangent line to the graph of y=3cot^4x at x=pi/4 3cot^4(pi/4)=3(1)=3

*October 2, 2014*

**physics**

An object is being thrown upward at 50m How long does it take the object to reach maximum height? What is the maximum height of the object? How much time does it take for the audit to return to its original position? What is the velocity of the object when it hits the ground? ...

*October 2, 2014*

**Math (Implicit Differention)**

it is x^(2/3)

*October 2, 2014*

**Math (Implicit Differention)**

((x^2)/3)+((y^2)/3)=4 d/dx 2x/3 + d/dx 2y/3 (y')= 0 y'= -(2x/3)-(2y/3) at the point (-1,3sqrt3) y'=(-2(-1)/3)-(2(3sqrt3)/3)=(2/3)-((6sqrt3)/3)=(2/3)-2sqrt3 Answer is (2/3)-2sqrt3 correct?

*October 2, 2014*

**Physical Science 8th grade**

A balloon filled with air does not rise as a balloon filled with helium. What does this tell you about the density of helium? A. Helium is more dense than air B. Helium is less dense than air C. The two gases have the same density D. When heated, helium becomes more dense

*September 8, 2014*

**statistics**

The human resources department of an engineering company gives IQ tests to a randomly selected group of new hires every year. They claimed that the mean IQ score of new hires, , from this year is greater than or equal to the mean IQ score of new hires, , from last year. This ...

*August 3, 2014*

**math**

The polynomial x 3 + 5x 2 -57x -189 expresses the volume, in cubic inches, of a shipping box, and the width is (x+3) in. If the width of the box is 15 in., what are the other two dimensions? ( Hint: The height is greater than the depth.)

*June 9, 2014*

**physics**

true

*June 9, 2014*

**Prevents**

If a book would cost 36 dollars and it had 10 percent of discount how much would the book cost after the discount

*May 28, 2014*

**geography**

Sammy is right omg wait cam is

*May 22, 2014*

**math**

If it takes a runner 15 minutes to run a mile how many miles would he run in two and half hours.

*May 5, 2014*

**math **

If it takes a runner 15 minutes to run a mile how many miles would he run in two and half hours?

*May 5, 2014*

**pre calculus**

a gun with a muzzle velocity of 1200 feet per second is fired at an angle of 6 degrees above the horizontal. find the component form of a vector. verify the magnitude

*May 5, 2014*

**math (check answer plz)**

answer is 2

*April 21, 2014*

**Math**

The quarterback of a football team releases a pass at a heights of 7 feet above the playing field, and the football is caught at a height of 4 feet, 30 yards directly downfield. The pass is released at an angle of 35 degrees with the horizontal. The parametric equations for ...

*April 21, 2014*

**Precalculus**

The quarterback of a football team releases a pass at a height of 7 feet above the playing field, and the football is caught at a height of 4 feet, 30 yards directly downfield. The pass is released at an angle of 35 degrees with the horizontal. The parametric equations for the...

*April 21, 2014*

**gg**

18000

*April 16, 2014*