# Posts by Brittany

Total # Posts: 951

**Physics**

Suppose you were to drop a 9 lb bowling ball from the top of the Empire State Building, which is about 440 m tall, onto a machine that would catch it and then convert its kinetic energy into electrical energy. For how long could the resulting energy light a 100 W light bulb? ...

**Physics**

While a roofer is working on a roof that slants at 37.0 ? above the horizontal, he accidentally nudges his 86.0 N toolbox, causing it to start sliding downward, starting from rest. If it starts 5.00 m from the lower edge of the roof, how fast will the toolbox be moving just as...

**Physics**

Two dogs are playing tug-o-war. The first dog pulls with the force of 400N and the second dog is hanging on but is being pulled towards the first dog at a constant velocity. What is the force of friction between the second dog's feet and the ground?

**Physics! Help!**

Please let me know if its correct or not. =20N+(-49.804N)+4.418E+3.673N+(-9.301)(-E)?

**Physics**

Thank you! Do you think you can help me another problem? All I know is the formula but dont know how to plug in the numbers in it. If you dont mind.

**Physics**

A swimmer crosses a river 300 yards wide by swimming at a constant velocity of 1 mile/hour perpendicular (that is, at right angles to) to the riverbank. The river is flowing at 3 miles per hour. What is the velocity (expressed in m/s) of the swimmer relative to an observer ...

**Physics**

The equation I start off with is vy=vyi-g*t? So it would be 0=4*sin35?

**Physics**

Thank you for the equation listed above! I am trying to solve it but I believe I am not doing a great job on it. Would you go step by step with me please? I'd appreciate it!

**Physics**

A baseball is hit by Aaron Judge, a New York Yankees baseball team member, at an amazing velocity of 110 miles/hour at an angle of 35 degrees from the horizontal from home plate in Yankee Stadium in New York City. The baseball was initially launched from an elevation of 4 feet...

**Physics**

A baseball is hit by Aaron Judge, a New York Yankees baseball team member, at an amazing velocity of 110 miles/hour at an angle of 35 degrees from the horizontal from home plate in Yankee Stadium in New York City. The baseball was initially launched from an elevation of 4 feet...

**College Physics**

The maximum speed of a 4.0-kg mass attached to a spring is 0.70 m/s , and the maximum force exerted on the mass is 12 N . a) What is the amplitude of motion for this mass? b) What is the force constant of the spring?

**Business Communication**

Please Break up the sentence. Reserving the property requires a $500 security deposit , which will be refunded unless there is damage to the property or evidence that there has been smoking in the cottage or a pet on the premises or if the reservation is canceled within one ...

**math**

Give an example that shows how to use the Distributive Property to multiply a number by a sum. All of the numbers you use should be mixed numbers or fractions.

**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 (...

**Physics**

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

**Physics**

I have tried and I did not find anything.

**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?

**Algebra 1**

Thanks Reiny.

**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.

**Algebra 1**

So is #1 wrong?

**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 ...

**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 ...

**Math**

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

**Physics**

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

**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...

**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 ...

**Physics**

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

**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 ...

**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)=$1000e^(0.005)(1) 5 P(5)=$...

**math**

(3/5 p) + 17 = 68

**Pre-Algebra**

3/5p+17=68

**geometry**

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

**Geography**

unscramble these words risut its a type of watch

**Math**

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

**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.

**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.

**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?

**math**

Why did the cow hate the Farmer

**Math**

I think so

**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.

**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.

**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 ...

**Basic Dressmaking Processes**

Yes.

**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...

**English**

So, the subject is fried rice??

**English**

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

**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.

**5th grade math**

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

**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

**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?

**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

**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?

**Statistics**

How is question 2= 0.754?

**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

**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...

**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.

**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 ...

**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 ...

**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)

**math algabra**

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

**geometry**

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

**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

**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.

**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.

**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.

**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.

**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).

**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.

**Chemistry**

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

**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...

**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.

**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

**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.

**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...

**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...

**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 ...

**math**

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

**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 ...

**Calculus**

-cosx+2

**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

**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, ...

**college algebra**

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

**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?

**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 ...

**math**

16

**P.E**

answers PLEASE

**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

**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

**Math**

Do you know why. Street. Runs

**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.

**chemistry**

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

**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.

**Inverses of functions**

−9+f−1(a−1)=−12 f(−3)=2

**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)

**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 ...

**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...

**geometry**

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

**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) ?

**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

**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? ...