Tuesday

July 22, 2014

July 22, 2014

Total # Posts: 71

**math**

A board is 84 cm long. How many meters long is this board?

**Physics **

The displacement, force, velocity, and acceleration vectors’ components are given. Calculate the magnitude and direction of each vector. (a) x = +15.0 cm, y = -12.3 cm. I am completely lost.

**Physics**

Looking up the answers will not help you on the physics test. Try looking in your book or reading guides for additional help.

**Chemistry**

Chloroform CHCl is an important solvent. It is produced by a reaction between methane and chlorine. How many g CH4 are needed to produce 50.0g CH4 +Cl3+ CH_4 + 3Cl_2 ->CHCl_3 + 3HCl}

**Chemistry**

2 SO2 (g) + O2 (g) → 2 SO3↑ Assuming STP, how many grams of oxygen are needed to produce 19.8 liters of SO3?

**science**

What are the measurable causes of weather and how does it impact our world?

**chemistry**

how many grams of chromium are required to react with 125 mL of 0.75M CuSO4?

**Algebra, HELP IM CLUELESS**

Eureka is 16 years younger than Renton. In 3 years Renton will be twice as old as Eureka. How old are they now? Eureka's Age: Renton's Age:

**Integrals**

Evaluate the integral of ∫(2x^2 −3)^2 dx

**calculus**

For the function f(x) = 3x2 − 5x − 7. Find the rate of change of f(x) at x = 3

**statistics**

Idiocracy. It's not a movie.

**calculus**

The marginal cost for a product is given by dC/dq = 1000/sqrt3q+20, in hundreds of dollars, where q is given in thousands of units. Determine the cost in dollars involved in increasing product from 10 to 15 thousand units. If R(0)= C(0)= 0, the marginal revenue is given by dR/...

**Calculus**

Fuel is flowing into a storage tank which can be filled to a depth of 6 metres. When the fuel started flowing the tank was already filled to a depth of 2.5m. If the rate at which the depth of fuel in the tank is increasing, in metres per hour is given by d'(t) = 4t +5, fin...

**Calculus**

Fuel is flowing into a storage tank which can be filled to a depth of 6 metres. When the fuel started flowing the tank was already filled to a depth of 2.5m. If the rate at which the depth of fuel in the tank is increasing, in metres per hour is given by d'(t) = 4t +5, fin...

**Calculus**

The marginal cost for a product is given by dC/dq = 1000/sqrt3q+20, in hundreds of dollars, where q is given in thousands of units. Determine the cost in dollars involved in increasing product from 10 to 15 thousand units. If R(0)= C(0)= 0, the marginal revenue is given by dR/...

**Calculus**

The acceleration due to gravity near the surface of Mars is 3.72ms^-2 . A rock is thrown straight up from the surface with an initial velocity of 23ms^-2 . How high does it go?

**Calculus**

Given f(x)=1+2cos x , find the area under the curve y=f(x) between x = pi/2 and 2pi/3.

**Calculus**

A cone is inscribed in a sphere of radius a, centred at the origin. The height of the cone is x and the radius of the base of the cone is r, as shown in the diagram opposite. Find the height, x, for which the volume of the cone is a maximum. (HINT: show that the volume of the ...

**Calculus**

A function is implicitly defined by x^2 - 4y^2 = 9 Find the equation of the tangent to the function at x = 1

**Calculus**

Given the function f (x) = 3cos x for the interval 0 < x < 2 sketch the graph of the function

**calculus**

Given the function f (x) = 3cos x for the interval 0 < x < 2pi, determine the concavity of the function, between the critical values

**Calculus**

Use Newton’s method to approximate the root of x^2 + 4x + 2 = 0 between x = -4 and x = -3 .

**math**

A ladder 10 m long rests on horizontal ground and leans against a vertical wall. The foot of the ladder is pulled away from the wall at 2 m/s. How fast is the top sliding down the wall when the foot of the ladder is 6m from the wall?

**science**

how many milliliters of 5.5M H2so4 must you use to prepare 500ml of 0.2M sulfuric acid solution? Please hurry!!!!!!

**social studies**

Please help! this is my worst subject! How did land-owning companies take advantage of the Homestead Act?

**Chemistry**

0.189

**math**

WHAT IS THE ANSWER TO THIS PROBLEM? (WRITE TWO DIFFERENT NUMBERS WHEN ROUNDED TO THE NEAREST TENTH EQUALS 18.3

**physics **

A cement block accidentally falls from rest from the ledge of a 52.0 -m-high building. When the block is 11.5 m above the ground, a man, 1.80 m tall, looks up and notices that the block is directly above him. How much time, at most, does the man have to get out of the way?

**statistics**

How do you calculate the slope and intercept of a regression?

**math**

What is the scientific notation for 15 x 10 to the 5th?

**Calc 1**

Answer is 12250

**Calc 1**

A farmer with 700 ft of fencing wants to enclose a rectangular area and then divide it into four pens with fencing parallel to one side of the rectangle. What is the largest possible total area of the four pens?

**chemistry**

How do you properly solve _ Ag + _ Cu(Nu3)2 ---> _ AgNo3 + _ Cu

**physics**

suppose a plane drops water from 1024 feet. how many seconds will it take for the water to hit the ground?

**science**

what nutrient works as a muscle builder and body repair worker

**Chemistry**

The answer is 5.73 moles Au

**Bio**

What role does DNA play in helicase?

**alegbra**

48 programs

**alegbra**

megan paid 1.50 each for programs to the game. she sold all but 20 of her programs for 4.00 each. even factoring in the money she lost for not selling all the programs, she still made a profit of 45.00. how many programs did megan buy in the first place?

**Calculus**

Find the volume of the solid obtained by rotating the region bounded by the given curves about the specified axis. y=0, y=x(3-x) about the axis x = 0

**Physics: Sound Waves**

Going to be about 1-2 hertz fyi, 345/pipe1 345/pipe2 and difference

**apush**

Ya, the answer is D

**chemistry**

if 5g of CH3COOH reacts how many moles of CO2 will be produced?

**chemistry**

What volume (in mL)of 0.0550 M calcium hydroxide is required to neutralize 38.00 mL of 0.0700 M nitric acid?

**chemistry**

What volume (in mL) of the base will react completely with 30.00 mL of 0.550 M HCl? 0.0500 M Ba(OH)2

**chemistry**

Bornite (Cu3FeS3) is a copper ore used in the production of copper. When heated, the following reaction occurs. 2 Cu3FeS3(s) + 7 O2(g) 6 Cu(s) + 2 FeO(s) + 6 SO2(g) If 3.88 metric tons of bornite is reacted with excess O2 and the process has an 75.6% yield of copper, what mass...

**chemistry**

Nitrogen (N2) and hydrogen (H2) react to form ammonia (NH3). Consider a mixture of six nitrogen molecules and six hydrogen molecules in a closed container. Assuming the reaction goes to completion, what will the final product mixture be? number of NH3 molecules? number of N2 m...

**math-word probblem**

Case Eastern Junior College awarded 26 varsity letters in crew, 15 in swimming, and 16 in soccer. If awards went to 46 students and only 2 lettered in all sports, how many students lettered in two of the three sports? is the answe 13 lettered

**math**

how do i solve y less than or equal to -2x+1

**Physics**

so i would do.. 23N - friction= 3.1(or 30.38N) *.5 and get f=7.81 then 7.81 = mu k * mu g ?

**Physics**

A force of 23.0 N is required to start a 3.1 kg box moving across a horizontal concrete floor. (a) What is the coefficient of static friction between the box and the floor? (b) If the 23.0 N force continues, the box accelerates at 0.50 m/s2. What is the coefficient of kinetic ...

**science/biology**

how will a goldfish respond if i put it in salt water

**science**

What is phmpoc?

**math... help me.. please =)**

well i think it's 1) 4x sq.root7 2) 5x just basically sq. root them(for the exponent divide by the root(since its square root it's 2 you divide by)

**Chemistry**

Kirsten is in her lab, and reacts two unknown gases (A(g) and B(g)) to get nitrogen dioxide (NO2). Using her data, she is able to write the following balanced equation: 2A(g) + B(g) --> 2NO2(g) If she started with 8 L of A(g) and 3 L of B(g), how many liters of NO2(g) would...

**Chemistry**

I'm not doing so well in ap chemistry. i think i'm not studying the right way. can anyone suggest how i can raise my grade? i do my homework but it doesn't seem to help.

**Science**

If your house is heated by a furnace that blows hot air into the rooms, you are depending on the process of ______ to stay warm. Choices are: convection, radiation,conduction, heat

**math**

yo just give me the answer straight cause i have no idea what that means

**math**

-2x + 4(2x - 9)

**maths**

Thanks Bob, but I dont need the formular just the answer. Once again thank you

**maths**

How far does a train travel going at 20mph for 45 seconds? And har far will it travel at 13mph for 58 seconds? Thanks

**math**

which 3 are correct a) if x= -10^4 then log10 x = -4 b)if x= 2^8 then log 2x = 8 c) log2 2= 4 d) if x= 3 then log10 3=x e) log 10 256-2log 10 16=0 f)log 10 (a-b)= log 10 a/log 10 b g) the gradient of the graph of y= 2e^x at x= 2 is 2e^2 h) the gradient of the graph of y= e^x a...

**math help**

Posted by grant on Saturday, May 12, 2007 at 9:20am. The table shows the depth (d metres) of water in a harbour at certain times (t hours) after midnight on a particular day. time t (hours) 0 1 2 3 4 5 6 7 8 9 10 11 12 13 and the in the next column corresponding to the figures...

**math**

The table shows the depth (d metres) of water in a harbour at certain times (t hours) after midnight on a particular day. time t (hours) 0 1 2 3 4 5 6 7 8 9 10 11 12 13 and the in the next column corresponding to the figures above is depth d (m) 3.0 3.3 4.2 5.6 7.2 8.2 9.0 8.9...

**math**

The table shows the depth (d metres) of water in a harbour at certain times (t hours) after midnight on a particular day. Time t (hours) Depth d (m) 0 3.0 1 3.3 2 4.2 3 5.6 4 7.2 5 8.2 6 9.0 7 8.9 8 8.1 9 7.3 10 5.6 11 4.3 12 3.5 13 3.1 Use the regression facilities on your ca...

**Career Question**

Hi everyone, I've got a career-related question. A few weeks ago, our class took a "Career Cruising" quiz, which is meant to help students explore career options that correspond to their interests and talents. Based on my quiz answers, my homeroom teacher suggest...

**Quantum Physics**

Each element has a different set of energy levels. Use this fact to "explain" whay the colour of the light emitted by an element in the gaseous state is characteristic of the element. When an electron falls from one of the higher energy levels to a lower energy level...

**Science**

A drop of oil (volume 0.05cm3) is released from a medicine dropper on to the calm surface of a pond where it spreads out to cover an area of "40cm2". Assume that the oil film has a uniform thickness equal to the diameter of a oil molecule. Calculate the diameter of a...

**French**

what does trousse mean in French?

**Math: Checkboard Squares**

In the formula how do you know to divide by six?

**Distributive property**

I NEED HELP

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