Thursday

April 24, 2014

April 24, 2014

Total # Posts: 2,269

**Biology**

Thanks

**Biology**

Why do we perform aerobic respiration when we're resting and both aerobic and anaerobic respiration while we're running?

**math**

A low ha this paper sux ):

**math**

352$ for mae assurian and sally got $4.44 cents for 148 newspapers.

**Applied statistics for business and economics**

I apologize, 3 of the above answers are not correct. * a. 0.0498 * b. 0.0000 c. correct * d. 0.0038 e. correct f. correct

**Applied statistics for business and economics**

a. 0.9998 b. 0.0002 c. 0.0504 d. 0.0224 e. 3 cards f. 1.731877594 (rounded 1.7319)

**Math**

Thank you!

**Math**

For what values of k does the function f(x)=(k+1)x^2+2kx+k-1 have no zeros? One zero? Two zeros?

**Physics**

average acceleration in m/s squared

**Physics**

A sports car accelerates from rest to 89 km/h in 6.1s . What is its average acceleration in

**Physics**

A sports car accelerates from rest to 89 km/h in 6.1s . What is its average acceleration in

**Physics**

If you are driving 100km/h along a straight road and you look to the side for 1.9s , how far do you travel during this inattentive period?

**physics**

If you are driving 100 along a straight road and you look to the side for 1.9 , how far do you travel during this inattentive period?

**Math**

Determine the domain and range of f(x)=-sqrt(x+3) and the equation of the inverse.

**Math**

If f(x)=x^2-6x+14 and g(x)=-x^2-20x-k, determine the value of k so that there is exactly one point of intersection between the two parabolas.

**Biology**

What does the net movement of solutes/solvents during osmosis and diffusion mean?

**chemistry**

A coal burning plant that burns 4 metric tons of coal containing 2% sulfur (S) requires 1 metric ton of wet limestone (calcium carbonate) to remove 90% of the sulfur. The process prevents most of the sulfur from being emitted as sulfur dioxide to the air by producing calcium s...

**chemistry**

A coal burning plant that burns 4 metric tons of coal containing 2% sulfur (S) requires 1 metric ton of wet limestone (calcium carbonate) to remove 90% of the sulfur. The process prevents most of the sulfur from being emitted as sulfur dioxide to the air by producing calcium ...

**physics**

find the frictional force between an air hockey puck and the table, assume u air = 1.8 X 10^-5 kg/ms, the puck is 0.013 above the table, the puck has an area of 25 cm^2

**chemistry**

A coal burning plant that burns 4 metric tons of coal containing 2% sulfur (S) requires 1 metric ton of wet limestone (calcium carbonate) to remove 90% of the sulfur. The process prevents most of the sulfur from being emitted as sulfur dioxide to the air by producing calcium s...

**chemistry**

A coal burning plant that burns 4 metric tons of coal containing 2% sulfur (S) requires 1 metric ton of wet limestone (calcium carbonate) to remove 90% of the sulfur. The process prevents most of the sulfur from being emitted as sulfur dioxide to the air by producing calcium s...

**precalc**

find where f(x)<0 and f(x)>0 f(x)=xlnx-2x

**Math**

Given f(x)=7-2(x-1)^2, x>= 1, determine f inverse (5).

**Math**

Given f(x)=2x^2-1, determine the equation of the inverse.

**Math**

Given f(x)=7-2(x-1)^2, x>= 1, determine f inverse (5).

**Chemistry**

what is the wavelength of the photon emitted when an electron drops from a 4p orbital to a 2p orbital in a hydrogen atom

**Biology**

A cell has a salt concentration of 0.2 %. If it is placed into a solution with a salt concentration of 0.1 %. a) What change will occur to the salt concentration inside the cell? b)What change will occur to the water concentration inside the cell? c)What condition will eventua...

**Economics**

True or false: The US must remove tariffs and quotas to open trade with foreign countries. Consider the following issues: The definition of tariffs and quotas. The strength of the dollar on domestic and global economies. Benefits from tariffs or quotas, including examples. Los...

**Chemistry**

Given a 2.5 kg solution of phosphoric acid and water (56 % phophoric acid, by mass), calculate the number of moles of phosphoric acid.

**Chem**

I got 100125 is that correct?

**Chem**

The specific heat capacity of aluminum is .89 J/y degrees C. How much heat is required to change the temp of 1500g aluminum pan from 25 degrees C to 100 degrees C?

**Chem**

The specific heat capacity of aluminum is .89 J/y degrees C. How much heat is required to change the temp of 1500g aluminum pan from 25 degrees C to 100 degrees C?

**calculus**

Find the equation of a cubic function that gives you the surface area of the cans given a set volume. The set volume is 300ml

**History**

yes

**Photography**

What's the difference between the setting of the enlarger height and focusing the image? Aren't both of the dealing with the light that shines onto the baseboard?

**Math**

What does it mean by: Show that the "value of 3x^2-6x+5" cannot be less than 1. ?

**Physics**

Oh! thanks! I understand it now :D

**Physics**

So it's 20 x 0.8=16?

**Physics**

A certain force made a 5.0 kg mass accelerate at 4.0 m/s^2. This same force made another object accelerate at only 0.8 m/s^2. Find the mass of the second object. I have no idea how to do this. Do i use m=1/a? What do i do?

**Physics- Newton's 1st and 2nd Law**

Thank you so much for the help!!

**Physics- Newton's 1st and 2nd Law**

Please help me :( Briefly explain the following scenario's using Newton's first law. a) Trevor wants to tow Kevin's car with his truck. He attached a small tow rope between the vehicles and leaves the rope slack (loose). Trevor quickly accelerates forwards making t...

**Math**

What are the vertical and horizontal stretch/compressions for the functions h(x)=1/(5x) and k(x)=|0.4x| ?

**physics**

A car drives straight off the edge of a cliff that is 56 m high. The police at the scene of the accident note that the point of impact is 129 m from the base of the cliff. How fast was the car traveling when it went over the cliff?

**Physics**

I understand the mass should be divided by the density for the required volume. I dont think that I am using the correct numbers. I came up with a volume of 172800 or 1.7 x 10^5 but the answer is incorrect. Can you please help?!! I did (1000V)(10)(500) = 1.7x 10^5

**Physics**

where would I use the 9.8m/s^2? And the density is which number?

**Physics**

To store the energy produced in 1.5 hour by a 160 MW (160 10^6 W) electric-power plant, how many cubic meters of water will have to be pumped from the lower to the upper reservoir? Assume the upper reservoir is 500 m above the lower and we can neglect the small change in depth...

**Math**

A 5 m stepladder propped against a classroom wall forms an angle of 30 degree with the wall. Exactly how far is the top of the ladder from the floor? Express your answer in radical form. What assumption did you make?

**math**

find a function y=ax^2+bx+c whose graph has an x-intercept of 1, a y-intercept of -2, and a tangent line with slope -1 at the y-intercept.

**Math**

Given any right triangle with an acute angle theta, a) Explain why csc theta is always greater than or equal to 1 b) Explain why cos theta is always less than or equal to 1

**hist**

who were the pilgrims and what did they believe?

**algebra**

A brick border that is x feet wide is built around a rectangular patio. The patio is 6 feet wide and 8 feet long. The combined area of the patio and the brick border is 120 square feet. What is the width of the brick border?

**algebra**

If the area of a square is 9x2-12xy+4y2, what is the perimeter of the square in terms of x and y. *its 9x squared and 4y squared i have several problems like this on my homework if you show me how to do this one im sure i could figure out the rest

**algebra**

Elliot is 5 times as old as Sid. Ten years from now, Elliot will be at least 3 times as old as Sid will be then. At least how old is each person now?

**Physics**

You are driving to the grocery store at 14.8 m/s. You are 140.0 m from an intersection when the traffic light turns red. Assume that your reaction time is 0.440 s and that your car brakes with constant acceleration. You are 133 m from the intersection when you begin to apply t...

**3rd grade**

200

**Physics**

i do not think that is correct because i am getting the incorrect answer.

**Physics**

You are driving to the grocery store at 14.8 m/s. You are 140.0 m from an intersection when the traffic light turns red. Assume that your reaction time is 0.440 s and that your car brakes with constant acceleration. You are 133 m from the intersection when you begin to apply ...

**Physics**

You are driving to the grocery store at 14.8 m/s. You are 140.0 m from an intersection when the traffic light turns red. Assume that your reaction time is 0.440 s and that your car brakes with constant acceleration. You are 133 m from the intersection when you begin to apply t...

**Physics**

A speedboat starts from rest and accelerates at +2.07 m/s2 for 7.00 s. At the end of this time, the boat continues for an additional 6.00 s with an acceleration of +0.523 m/s2. Following this, the boat accelerates at -1.55 m/s2 for 8.00 s. What is the velocity of the boat at t...

**Physics**

nope :(

**Physics**

kk got that. did you get number 18?

**Physics**

okay ! and which q'n did u get 255 m for?

**Physics**

k i got this one.. find the t it takes for each runner using t=d/v....then subtract the times, and you have the answer !

**Physics**

A speedboat starts from rest and accelerates at +2.07 m/s2 for 7.00 s. At the end of this time, the boat continues for an additional 6.00 s with an acceleration of +0.523 m/s2. Following this, the boat accelerates at -1.55 m/s2 for 8.00 s. What is the velocity of the boat at t...

**Physics**

You are driving to the grocery store at 14.8 m/s. You are 140.0 m from an intersection when the traffic light turns red. Assume that your reaction time is 0.440 s and that your car brakes with constant acceleration. How far are you from the intersection when you begin to apply...

**Physics**

alrighttyy. did u get number 13, 14 or 18?

**Physics**

okay thanks ! was your velocity really small and negative then?

**Physics**

okay but what does 'u' refer to? Also, for question #7, how did you figure out the total velocity for the entire trip?

**Physics**

oh okay i got that ! thanks. for the second part..how long it takes to reach the bottom.. do u use t = d/v?

**Physics**

yes. but how did you get it because i have different numbers

**Physics**

I have this same question.. got it wrong

**Science**

thks

**Science**

What is a experimental investigation? What is a descriptive investigation?

**Physics**

Superwoman is hovering above the ground when a person free-falling goes by her at a terminal velocity of 140 km/h. Unfortunately, the parachute does not open. Fortunately, Superwoman is around. If it takes her 1.9 s to realize the person is in distress, what must her accelerat...

**Biology**

How does a plant growth regulator differ from a plant growth hormone?

**AP world history**

i have to write a DBQ promt question for the interaction between humans and the enviornment (demography and disease, migration,technology, and patterns of settlement) about roman empire

**Physics**

Two rugby players are running towards each other. They are 37 m apart. If one is accelerating from rest at 0.5 m/s^2 and the other was already moving at 3.1 m/s and maintains her speed, a)how long before they crunch together? b)How fast was the accelerating player going? c)How...

**Physics**

A police car stopped at a set of lights has a speeder pass it at 100 km/h. If the police car can accelerate at 3.6 m/s^2, how long does it take to catch the speeder?

**7th grade**

5x-10-2x+7=0 3x-3=0 3x=3 x=1

**Physics**

Thanks!

**Physics**

On a velocity-time graph of a person's walk, if a person is slowing down in the positive direction, then acceleration is in the negative direction.For example, the positive direction is [E]. If a person's acceleration is -1m/s^2, then it is 1 m/s^2 [West]. But that doe...

**Math**

How did u get the answer?

**Math**

Ali did his homework at school with a graphing calculator. He determined that the equation of the line of best fit for some data was y=2.63x-1.29. Once he got home, he realized he had mixed up the independent and dependent variables. Write the correct equation for the relation...

**Math**

If f(x)=x^2, what is the domain and range of y=0.5f(3(x-4))-1?

**Physics**

Thanks!

**Physics**

If 100 m sprinters accelerate from rest for 3.5 s at 2.8 m/s^2, how far have they run to this point? How long will it take them to complete the 100 m sprint, assuming they maintain their speed the rest of the way? I found the distance, which is 17 m, and the distance they stil...

**Economics**

Name 2 government bodies or agencies that have an impact on the national housing market. Explain the role of each body or agency in relation to the housing market.

**physics**

I don't understand this part.... 2) force*distance=1/2 m v^2 force= mass*(4g)/2d= 2*g*mass/.74

**chem 101**

yay i was right, thank you very much for your help

**chem 101**

a.write a balanced chemical equation for the complete combustion of sucrose. --- this part of the question i got help on, and thank you b. if combustion is complete, a brown liquid caramel might form, followed by a brown/black solid. what would be the major component of the so...

**chem 101**

if combustion is complete, a brown liquid caramel might form, followed by a brown/black solid. what would be the major component of the solid?

**chem 101**

write a balanced chemical equation for the complete combustion of sucrose.

**Economics**

How can you use information about the business cycle when making a decision about a large purchase?

**math**

explain why 1734 is greater then 175

**italian**

How do i say my name in italian.

**arithmetic**

Thanks 68%

**arithmetic**

Thanks

**arithmetic**

I got 102 questions right out of 150 on a math test. What percentage did I get on theis test?

**geography**

Rivers bring water for ______ and ____. ?????? Fill in the blank with no options.

**Geography**

What is the second longest river in North America?

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