Monday

January 23, 2017
Total # Posts: 1,075

**Calculus**

As an ice cube melts its surface area in decreasing at a rate of 6 cm^2 / sec. Find the rate at which the length of each side is decreasing at the moment when each side has length 2 cm.

*December 11, 2015*

**Physics**

A natural gas power plant burns natural gas to produce electricity. In one second it produces 500 MJ of electrical potential energy. The power plant consumes chemical energy in order to produce electrical potential energy. --In one second does it consume 500 MJ of chemical ...

*December 9, 2015*

**Physics**

A person slides down a slope. At the end of their slide they are brought gently to rest by a large spring. Friction on the slope cannot be ignored. Draw an energy bar chart for this situation. Define your system any way you want, but clearly state how you have defined your ...

*December 9, 2015*

**Math**

A river flows at the speed of v from west to east. How should a man who is at a point A of the southern bank of the river, which is d meters away from the river, and wants to reach a point B on the northern bank of the river, which is 2d meters away from the river, choose his ...

*December 7, 2015*

**geometry**

Let $\overline{PQ}$, $\overline{RS}$, and $\overline{TU}$ be parallel chords of a circle. The distance between chords $\overline{PQ}$ and $\overline{RS}$ is 4, and the distance between chords $\overline{RS}$ and $\overline{TU}$ is also 4. If $PQ = 78$ and $TU = 50$, then find...

*December 6, 2015*

**Algebra**

wwas this right

*December 4, 2015*

**Physics**

As usual, a drag coefficient of 0.5 is a reasonable guess. A cyclist going at a steady speed is mostly working to keep drag from slowing them down (rolling friction plays a part but is much smaller). Estimate what the power output is of a cyclist going at 40 km/hr.

*December 2, 2015*

**Algebra 1- Just one question please :)**

Was this right @basketball&batman

*December 1, 2015*

**Math**

A strees light L hangs H feet above a flat straight street. A person h feet tall at point O directly under the street light at time t=0 seconds, moves in a straight line along the street a v feet/second. If H=20 feet, h=6 feet, and v=4 miles per hour, find the velocity v of ...

*November 30, 2015*

**Math**

A spherical balloon expands uniformly as it is inflated. The radius of the balloon in r meters at time t seconds. Find the radius, the volume, and the surface area of the balloon when the rates of increase of the surface area of the balloon and the radius are numerically equal

*November 30, 2015*

**Math**

After school, Laura baby sits a neighbor's child for 50 minutes. They rest for 10 minutes,read for 15 minutes,and play the rest of the time. Write the total baby sitting time, the resting time and reading time, as fractions of an hour.

*November 30, 2015*

**Math/Fractions**

After school, Laura baby sits a neighbor's child for 50 minutes. They rest for 10 minutes,read for 15 minutes,and play the rest of the time. Write the total baby sitting time, the resting time and reading time, as fractions of an hour.

*November 30, 2015*

**Math**

4/10 of a mile from Jose's house to the school.

*November 30, 2015*

**Math**

Shawn rides his bicycle 9/10 mile to school. On his way to school, he stops at Mike's house, which is 1/5 mile from Shawn's house. Then they both ride to José house, which is 2/7 mile from Mike's house. How far is it from Jose's house to the school?

*November 30, 2015*

**Math**

Suppose that a cyclist began a 510 mi ride across a state at the western edge of the state at the same that a car traveling toward it leaves the eastern end of the state if the bicycle and car met after 8.5 hr and the car traveled 33.4 mph faster than the bicycle find average ...

*November 29, 2015*

**Math**

Suppose that a cyclist began a 450 mi ride across a state at the western edge of the state, at the same time that a car traveling toward it leaves the eastern end of the state. If the bicycle and car met after 7.5 hr and the car traveled 30.4 mph faster than the bicycle, find ...

*November 29, 2015*

**College Physics**

a man pushes a lawn mower 50 feet in 5 second by exerting a force of 30 pounds at an angle of 53 with the horizon. find the work done and the average power expended?

*November 27, 2015*

**College Physics**

a man pushes a lawn mower 50 feet in 5 second by exerting a force of 30 pounds at an angle of 53

*November 27, 2015*

**Physics**

3. A low friction cart (similar to what you use in the lab) collides with a second low friction cart. Cart A has a mass of 0.500 kg and cart B has a mass of 0.750 kg. Glider A was moving at 40.0 cm/s before the collision. Glider B was at rest. (a) The carts have velcro on them...

*November 23, 2015*

**Physics**

One end of a spring is attached to the ceiling. The unstretched length of the spring is 10.0 cm. A 2.0 kg mass is hung from the other end of the spring. It is slowly lowered until it comes to rest. At this point the spring is 15 cm long. (a) What is the stiffness (spring ...

*November 23, 2015*

**math fractions**

Sherry spent 1/5 of her money on school supplies and 3/8 of the remainder on a CD player. She had $25 left. How much money did she have at first? do not use algebra

*November 19, 2015*

**Algebra**

right/

*November 17, 2015*

**History vocabulary**

I have looked every where. I am in honors 7th grade history. Help please I need a sentence with the word mullah and jihad?

*November 17, 2015*

**Physics**

A car is traveling North. In which direction are the wheels turning. This is under the torque chapter

*October 24, 2015*

**Physics**

A car is traveling North. In which direction are the wheels turning. This is under the torque chapter

*October 24, 2015*

**chemistry**

2.17kcal

*October 24, 2015*

**physics**

There is a car turning on an unbanked road. The mass of the car is 2000kg moving at constant speed 36mph. The radius of the unbanked curve is 100m. the driver sees an obstacle at 20m ahead along the curve. he presses the brakes and expects to have a constant deceleration along...

*October 23, 2015*

**MATH**

One half of a number minus 9 is 14

*October 22, 2015*

**St Eugene university**

Solve x^2 times second derivative -3x times first derivative -5y =sin(logx) my solution is integrating both sides we have sinxlogx

*October 17, 2015*

**physics**

A ball starts at the top of a ramp with an incline of 7 degrees and rolls down, picking up speed. (see the table below) Time (s) Position (m) 0 0 .4917 .1 .7625 .15 .975 .3 1.1583 .45 1.2833 1.6467 (a) Linearize the data and find the slope of the new line. [Slope=.3745?] (b) ...

*September 30, 2015*

**biology**

what is the difference between an exergonic reaction and an endergonic reaction?

*September 24, 2015*

**Ap world history**

lack of wars

*September 16, 2015*

**Chemistry**

1. What volume of nitric acid solution with mass fraction of 16% is required to make make 250ml solution with 0.2mole/l?

*September 15, 2015*

**Political Science**

Does the representation system in the U.S. Senate still make sense today? Why or why not?

*August 28, 2015*

**Political Science**

Develop an argument for a strong national government, or for greater state sovereignty and independence.

*August 28, 2015*

**PHIL324L**

reinterpreting motives

*August 19, 2015*

**English**

There should be more pe taught in school each week - rhetorical question

*June 27, 2015*

**chemistry**

M1V1=M2V2 M*25= 0.0619*38.9 = MHCl= 2.408/25 MHCl= 0.0963 M

*June 14, 2015*

**solving two-step inequality**

Translate the following inequality into written language. 5x-6<14

*June 9, 2015*

**Math**

12 hours

*June 6, 2015*

**chemistry**

Can methane and oxygen be separated. If yes, can anyone please mention the method

*May 11, 2015*

**Physics**

28.8 m/s

*May 5, 2015*

**Statistics**

A particular fruit's weights are normally distributed, with a mean of 353 grams and a standard deviation of 6 grams. If you pick one fruit at random, what is the probability that it will weigh between 334 grams and 344 grams?

*May 4, 2015*

**Math**

9121518

*April 30, 2015*

**Physics**

A ball rolls off the edge of a 0.75m high lab table with a horizontal speed of 1.50 m/s. Calculate the time that the ball is in flight, calculate the vertical velocity of the ball just before striking the floor, and calculate the horizontal distance(range) that the ball will ...

*April 16, 2015*

**Algebra 2 math**

In triangle GHI, angle H is a right angle, GH = 40, and cos G= 40/41. Draw a diagram and find each value in fraction and in decimal form. a) Sin G b. Sin I c. Cot G d. csc G e. cos I f. sec H - I have no idea how to do this

*April 8, 2015*

**age question**

A man is 24 years when his son was born. Now he is three times as old as his son. Find the age of the son.

*April 3, 2015*

**Social Studies**

Not to be rude or anything

*March 30, 2015*

**Social Studies**

I don't really know why it is that that answer was right, I just know that it was right.

*March 30, 2015*

**Social Studies**

Lol I accidentally submitted it and got it right. Its D. Its industrial Base

*March 30, 2015*

**Social Studies**

What was one of the main advantage of the South? A.) A small population of free men B.) The Strong support of its white population C.) Its belief in states' rights D.) Its industrial base I think its either C or D

*March 30, 2015*

**Physical science**

Nail polish fist and water second spirit is third and ethanol is last

*March 25, 2015*

**Literacy**

10 facts about sugar from Belize

*March 22, 2015*

**Geology**

Rank the following three types of sedimentary rocks in terms of rate of sedimentation from highest (1) to lowest (3) by assigning numbers 1 to 3 to the following: A) Limestone B) Chert C) Sandstone

*March 16, 2015*

**EES**

Name a mineral or rock that has more than one element and how humans use it in everyday life

*March 16, 2015*

**Maths**

The red ribbon is 27 cm long. the red ribbon is three times the length of blue. What is the length of blue?

*March 6, 2015*

**chemistry**

is it 2.5

*February 28, 2015*

**Algebraic expression**

translate 20 split evenly with a number into an algebraic expression

*February 26, 2015*

**History**

Identify another name given to the Muslim invaders.

*February 25, 2015*

**Statistics**

A vending machine pours an average of 8.0 oz of coffee with a standard deviation of 0.2 oz if it is functioning properly. An inspector wants to take 16 cups of coffee from the machine to see if the machine is functioning well or not. He wants to have a significance level of 4...

*February 24, 2015*

**life oreintation**

Show link between intrapersonal conflict and initiating relationship?

*February 23, 2015*

**Physics**

An object experiences a constant acceleration of 4.0 m/s2 along the −x axis for 4s, obtaining a velocity of 31 m/s in a direction 30° from the +x axis. Find the initial velocity vector of the object. (The angle of the object is measured counterclockwise from the +x-...

*February 23, 2015*

**morakolo sec**

To what extent can interpersonal conflict affect communication in a relationship?.

*February 22, 2015*

**Finance**

No,lose $84,658.62

*February 19, 2015*

**physics**

a projectile is thrown from the ground with an initial velocity of 20.0m/s at an angle of 40 degrees above the horizontal, find the maximum height,the time required to reach its maximum height,c) it velocity at the top of the trajectory.d) the range of the projectile,e) the ...

*February 19, 2015*

**Math**

34 meters

*January 26, 2015*

**Chemistry (Electrochemistry)**

Consider the titrtation of 25.0mL of 0.0100M Sn2+ by 0.0500M TI3+ in 1 M HCL, using Pt and Saturated Calomel Electrodes to find the endpoint. F=96486.7 Cmol E0 Sn4+/Sn2+ =0.15V E0 TI3+/TI+ = 1.28 Esce = 0.241V R=8.3141 J K Mol (a) Write the balanced reaction. Sn4+ + 2e- <...

*January 21, 2015*

**Chemistry (Acid-Base)**

Butanoic acid (Ka = 1.52 x 10-5) has a partition coefficient of 3.0 (favouring benzene) when distributed between water and benzene. Find the concentration of butanoic acid in each phase when 20.0 mL of 0.10 M aqueous butanoic acid is extracted with 25 mL of benzene at (a) pH 4...

*January 21, 2015*

**Chemistry**

Butanoic acid (Ka = 1.52 x 10-5) has a partition coefficient of 3.0 (favouring benzene) when distributed between water and benzene. Find the concentration of butanoic acid in each phase when 20.0 mL of 0.10 M aqueous butanoic acid is extracted with 25 mL of benzene at (a) pH 4...

*January 19, 2015*

**Chemistry**

In water at 25°C, which of the following is the most basic solution? a) pH = 3 b) pH = 0 c) [OH-] = 10-13 M d) [H3O+] = 10-13 M My assumption is is OH- 10^-13, but I am not confident, is this some sort of trick question?

*January 19, 2015*

**physics**

A person is standing on and facing the front of a stationary skateboard while holding a construction brick. The mass of the person is 87.0 kg, the mass of the skateboard is 4.10 kg, and the mass of the brick is 2.50 kg. If the person throws the brick forward (in the direction ...

*January 15, 2015*

**physics**

An object is moving so that its kinetic energy is 198 J and the magnitude of its momentum is 13 . 1 kg · m / s. Determine the speed of the object. Answer in units of m / s.

*January 13, 2015*

**Chemistry**

An EDTA solution is standardised against high-purity CaCO3 by dissolving 0.4835 g CaCO3 in HCl, adjusting the pH to 10 with ammoniacal buffer and titrated with an EDTA solution. If 35.18ml were required for the titration, what was the molarity of the EDTA solution? Step 1. ...

*January 11, 2015*

**Chemistry**

Please help, I can't do this and its stressing me out ?!?! A 25.0 mL aliquot of an aqeuous quinine solution was diluted to 50.0mL and was found to have an absorbance of 0.832 at 348nm when measured in 2.00cm cell. A second 25.0mL aliquot was mixed with 10.0ml of a solution...

*January 10, 2015*

**physics**

What is friction

*January 6, 2015*

**Langague Arts 8th Grade**

i think 8 is character vs character i think 9 is the last one and 10 is hostility. do you have 1 and 2? i need those

*January 4, 2015*

**Calculus**

The function h(x) = x^3+bx+d has a critical point at (2,-4). Determine the constants b and d and find the equation of h(x). I'm very confused and I do not have any idea on what the first step is.

*January 2, 2015*

**Calculus**

The function h(x) = x^3+bx+d has a critical point at (2,-4). Determine the constants b and d and find the equation of h(x). Show your work.

*January 2, 2015*

**physics**

what is retardation

*December 10, 2014*

**PHYSICS : I NEED HELP PLEASE**

a man pushes a lawn mower 50 feet in 5 second by exerting a force of 30 pounds at an angle of 53

*December 6, 2014*

**math**

help: Two travelers start simultaneously in two cities A and B, and go to meet each other. The part of A walk 1 km on the first day , the second day 2 km , 3 km on the third day , and so on. The part of B walk 20 miles the first day, the second day 18 km , 16 km on the third ...

*December 2, 2014*

**chem due soon**

The ΔH of the reaction below is -575.13 kJ. Is this reaction spontaneous? 2ZnS + 3O2 + C → 2SO2 + 2Zn + CO2 A. It is not because the ΔH of the reaction is negative. B. It is because the ΔH of the reaction is negative. C. It depends on the temperature ...

*December 1, 2014*

**chem due soon**

At temperatures above 0°C, what is the sign of the change in free energy for the conversion of liquid water to ice? A. Positive B. Zero C. Negative D. Not known

*December 1, 2014*

**Science.. Need help ASAP!**

wats the answers?

*December 1, 2014*

**english**

what are the ideas proposed in “Civil Disobedience.” I need to choose one and make a letter.

*December 1, 2014*

**history**

No, not during the war, after it. With the poor economy women had difficult finding any work outside of home.

*November 29, 2014*

**history**

Postwar America (1918-1920) faced social change. Explain in 3-5 sentences the changes that occurred at this time.

*November 29, 2014*

**physics**

Density of copper= 8960 kg/m^3 " " "" water = 1000 kg/m^3 v= √(T/ρ)= λf λ= 1/f1 √(T1/ρ)= 1/f2 √(T2/ρ) 1 is before submersion and 2 is after f2= f1 √(T2/T1) T2= T1-B B is the buoyant force B= ρ(w)V(w)g (w...

*November 29, 2014*

**spanish don't know which to choose**

spanish cutures

*November 28, 2014*

**spanish don't know which to choose**

A simple route to appreciate other languages and cultures is to explore how your own language and culture have been influenced by other cultures. To help you do this, take a few minutes and discuss in Spanish (1-2 paragraphs) aspects your culture has borrowed from Spanish ...

*November 28, 2014*

**chemistry**

At temperatures above 0°C, what is the sign of the change in free energy for the conversion of liquid water to ice? A. Positive B. Zero C. Negative D. Not known

*November 27, 2014*

**physics**

A proton moves with a velocity V (2i - 4 j + k) m / s in a region where the field is given by B = (i + 2 j -3k) T . What is the magnitude of the magnetic force experienced by the load?

*November 23, 2014*

**physics**

Moving fast proton of 4x106 m / s through a 1.7 T magnetic field experiences a force 8x10-13N magnetic. What is the angle between the velocity vector associated with the proton and the magnetic field?

*November 23, 2014*

**physics**

8.0E5J

*November 19, 2014*

**Thermodynamics**

Uh.. sorry for posting the same question, i think i already got the answer, in a previous question. Thany you again.

*November 18, 2014*

**Thermodynamics**

What are the different types of Diffusers?

*November 18, 2014*

**English**

My homework is hard. The question is: COMPARE THE WAYS THE POETS PRESENT STRONG EMOTIONS IN 'MEDUSA' AND ONE OTHER POEM FROM CHARACTER & VOICE. The two poems are Medusa and Les Grand Signeurs. Medusa:Be terrified. It’s you I love, perfect man, Greek God, my own; ...

*November 17, 2014*

**algebra**

maybe a diagram cud be of help, because i cant understand the quest.

*November 17, 2014*

**Thermodynamics**

oh thank you very much for your help, but what i wud like to know, is, can i include these kind of diffusers in a thermodynamics assignment?

*November 17, 2014*

**Thermodynamics**

Hello, Can i know what are the different types of diffusers ? Plz don't tell me to google it, becaus ei already did so, and its not much of great help. Thank you

*November 17, 2014*