Saturday

February 28, 2015

February 28, 2015

Total # Posts: 78,257

**SS**

What might be the impact on a country when the oldest people are in their 40s?
*February 16, 2015*

**Argumentative essay check please!!!**

I forgot that, thanks!
*February 16, 2015*

**Algebra 1**

thank you
*February 16, 2015*

**transcription**

ABDOMEN: Soft without masses
*February 16, 2015*

**GEOMETRY**

What is the value of W? A triangle with hypotenuse W and with a leg with length 7sqrt3 and angles measuring 90 degrees and 30 degrees. 7 3.5 7 sqrt3 14
*February 16, 2015*

**physics**

A charge of +355 μC is fixed at the center of a square that is 0.64 m on a side. How much work is done by the electric force as a charge of +7.9 μC is moved from one corner of the square to any other empty corner?
*February 16, 2015*

**physics**

A police officer investigating an accident estimates that a moving car hit a stationary car at 24km/h . If the moving car left skid marks 45m long, and if the coefficient of kinetic friction is 0.71, what was the initial speed of the moving car? Express your answer using two ...
*February 16, 2015*

**physics**

Starting from rest, a skier slides 100 m down a 28 ∘ slope. How much longer does the run take if the coefficient of kinetic friction is 0.17 instead of 0? Express your answer using two significant figures.
*February 16, 2015*

**physics**

The handle of a 27kg lawnmower makes a 36∘ angle with the horizontal. If the coefficient of friction between lawnmower and ground is 0.66, what magnitude of force, applied in the direction of the handle, is required to push the mower at constant velocity? Express your ...
*February 16, 2015*

**physics**

A skier of mass m = 55kg glides down a slope at angle theta = 32∘, as shown in the figure below. The snow is so slippery that you can neglect friction. Find the skier's acceleration. Express your answer using two significant figures. Find the force the snow exerts on...
*February 16, 2015*

**physics**

Children sled down a 44m -long hill inclined at 27∘ . At the bottom, the slope levels out. If the coefficient of friction is 0.11, how far do the children slide on the level ground? Express your answer using two significant figures.
*February 16, 2015*

**Criminal Justice/Judicial Process**

should be B, to me. I dunno exactly, though...
*February 16, 2015*

**Accelerated Science**

Are you in 6th Grade because I might know you from school.
*February 16, 2015*

**Accelerated Science**

Radiation is the heating throught electromagnetic waves Conduction is the heating through touch convection is the heating through hot liquid or gas
*February 16, 2015*

**Accelerated Science**

Match each situation with the correct method of heat transfer: a. radiation b. conduction c. convection __A_ 1) The inside of a car gets very hot when that car is parked on a parking lot in the middle of August. __A_ 2) During the winter when the furnace is running in a two-...
*February 16, 2015*

**life orientation**

If a person is in a period of depression. Axiety and low self esteem
*February 16, 2015*

**I am so lost**

The freezing point of pure cyclohexane is 6.60°C and the freezing point depression constant is 20.00°C/m. The freezing point of a solution containing 0.161 g of an unknown nonelectrolyte solute and 5.818 g of cyclohexane was 3.98°C. What is the molar mass of the ...
*February 16, 2015*

**science**

A girl drops a stone into a mineshaft 122.5m deep. how soon after she throws does she here the striking of the stone at the bottom of the shaft?
*February 16, 2015*

**Physics**

A group of students observes that a wooden block (m = 0.40 kg) on the end of a string with a radius of 0.7 meters makes 12 rotations in 20.7 seconds when twirled. Calculate the centripetal acceleration of the wooden block: Calculate the tension in the string acting on the ...
*February 16, 2015*

**Physics**

A group of students observes that a wooden block (m = 0.40 kg) on the end of a string with a radius of 0.7 meters makes 8 rotations in 20.7 seconds when twirled. What is the block's tangential (linear) speed? What is the block's angular speed?
*February 16, 2015*

**physics**

Two forces of the same magnitude act at a point.the square of their resultant is 3 times the product of their magnitudes.the angle between them is?
*February 16, 2015*

**costs**

if 4 pencils sell for .59 cents how much will 25 pencils cost?
*February 16, 2015*

**Chemistry**

How much potassium chloride in grams is needed to prepare 1500ml solution of 3% kcl solution? This is my answer: 3x1500=4500 4500÷100=45 Answer is 45gm
*February 16, 2015*

**I am so lost**

The freezing point of pure cyclohexane is 6.60°C and the freezing point depression constant is 20.00°C/m. The freezing point of a solution containing 0.161 g of an unknown nonelectrolyte solute and 5.818 g of cyclohexane was 3.98°C. What is the molar mass of the ...
*February 16, 2015*

**physics**

An unknown object with mass M slides on a smooth frictionless surface with a speed of 35.0 m/s along the x-axis. Suddenly it explodes into two pieces, P and Q, which move in different directions as shown in the figure below. Determine the final velocity of both fragments if ...
*February 16, 2015*

**math**

how many inches in a foot
*February 15, 2015*

**Physics**

What is the difference in blood pressure (mm−Hg) between the top of the head and bottom of the feet of a 1.82m tall person standing vertically?
*February 15, 2015*

**business managment**

creating a slide that will have a large and a number of bullet points below it. what slide format should she use? A.)comparison B.)title and content C.)title only D.)two content
*February 15, 2015*

**life orientation**

u
*February 15, 2015*

**life orientation**

Unable to quit
*February 15, 2015*

**stats**

7. Give and interpret the 95% confidence interval for the hours of sleep a student gets.
*February 15, 2015*

**life orientation**

this is bull !@#$%^& were are de !@#$%^&ing answers
*February 15, 2015*

**Physics**

You are given a vector in the xy plane that has a magnitude of 85.0 units and a y component of -40.0 units
*February 15, 2015*

**Life orientation**

Link between intrapersonal conflict and initiating
*February 15, 2015*

**Life orientation**

Link between intrapersonal conflict and initiating
*February 15, 2015*

**Life orientation**

Link between intrapersonal conflict and initiating
*February 15, 2015*

**math**

If a United States dollar is worth $1.41 in Canadian money, how much is $100 in Canadian money worth in the united state money, to the nearest cent
*February 15, 2015*

**math**

Joe drank 4 liters of water on Monday and 4 deciliters of water on Tuesday. How much more water did he drink on Monday than on Tuesday?
*February 15, 2015*

**maths**

An open bucket is in the form of a frustum of a cone,whose radii of bottom and top are 7 and 28cm.If the capacity of the bucket is 21560cmcube,then find the cost of metal sheet used in making the bucket at the rate of Rs. 1per10cmsq.
*February 15, 2015*

**maths **

The top of a T.V tower casts a shadow of 35 metres long when the angle of elevation of the sun 57°40'.How high is the top of the tower?
*February 15, 2015*

**Math**

So far john has run 1/4 of the way to school and walked 3/8 of the way.What fraction of the distance to school does john have left?
*February 14, 2015*

**Physics**

If the rifle is stopped by the hunter’s shoulder in a distance of 3.16 cm, what is the magnitude of the average force exerted on the shoulder by the rifle? Answer in units of N. mass of bullet= 0.0137 kg velocity of bullet= 546 m/s to the right mass of rifle= 3.82 kg ...
*February 14, 2015*

**French**

But my textbook has an example of à midi et demi. If it is right to use à for midi et demi, then why can't I do the same for matin?
*February 14, 2015*

**French**

Which sentence is correct? 1. J'ai anglais de matin. 2. J'ai anglais à matin.
*February 14, 2015*

**Physics **

How does the energy stored in a capacitor change if (a) the potential difference is doubled, and (b) the charge on each plate is doubled, as the capacitor remains connected to a battery?
*February 14, 2015*

**Science**

Thank you
*February 14, 2015*

**math**

on a test of 50 question jill answered 47 correctly.how many percent did she answered correctly
*February 13, 2015*

**math**

The annual interest rate for a customer’s loan of $425 is 15.75%. What is the total dollar amount to be repaid on the loan, including principle and interest, for the entire year?
*February 13, 2015*

**Physics **

How does the energy stored in a capacitor change if (a) the potential difference is doubled, and (b) the charge on each plate is doubled, as the capacitor remains connected to a battery?
*February 13, 2015*

**math**

why it become 42?
*February 13, 2015*

**kayli**

Thermal energy is caused by the motion of
*February 13, 2015*

**pre- calculus**

In how many ways can a family of six be seated at a round table if the mother and father must sit together?
*February 13, 2015*

**GEOMETRY**

Thank you
*February 13, 2015*

**GEOMETRY**

Find the exact length of the altitude drawn to the hypotenuse. Do not round. The triangle is not drawn to scale. A triangle with base measures of 9 & 17. Draw a diagram. Using similar triangles, we know that h/9 = 17/ã370 I need more help with this. Thank you
*February 13, 2015*

**Calculus**

Let f(x)=cosxsqrt(1+sinx). A. Let F(x)=the integral of f(x)dx and F(0)=5/3, find F(pi/2). I got 3.386 with U-substitution B. If G(x)=the integral of f(x)sinxdx and G(0)=1/3, find G(x). I got a reply to this but I did not understand the explanation. How would I solve this with ...
*February 13, 2015*

**health**

If older adults are at risk of falling ,they should do exercises that maintain or improve
*February 13, 2015*

**maths**

A and B can finish a piece of work in 16 days and 12 days respectively. A started the work and worked at it for 2 days.He was then joined by B.Find the total time taken to finish the work.
*February 13, 2015*

**Calculus**

The integral of sin(7x)cos(7x)dx
*February 13, 2015*

**Calculus**

Integration with substitution The integral of f'(g(5x))g'(5x)dx
*February 13, 2015*

**physics**

Stone dropped from top of a tower 100m high. At same instant another stone is thrown vertically from base of the tower with a velocity of 25m/s. When and where will the two stones meet? Given g =10 m/s^2
*February 13, 2015*

**Calculus**

I don't understand your explanation. How would you go about it with u-substitution?
*February 13, 2015*

**Calculus**

Let f(x)=cosxsqrt(1+sinx) A. If F(x)=the integral of f(x)dx and F(0)=5/3, find F(pi/2). B. If G(x)=the integral of f(x)sinx dx and G(0)=1/3, find G(x).
*February 13, 2015*

**Calculus**

f'(x) if x is less than or greater than 1 Let F'(x)={ g'(x) if x>1 Where f'(x)=x/(x^2-2)^2 and g'(x)=3x-4 A. If f(1)=3/2, find f(x) B. If F(x) is continuous at x=1, find g(x). C. Express F(x). D. If F(x) is continuous at x=1, determine if F(x) is ...
*February 13, 2015*

**Calculus**

Integration with trig functions Integral of [(1-sinx)/cos^2x] dx
*February 12, 2015*

**Geometry**

What is the value of x, given PQ || BC? Triangle: A, B, C with bisector PQ AP = 8 PB = x AQ = 12 QC = 18
*February 12, 2015*

**Calculus**

Integration with U-Substitution Integral of [x/sqrt(x+1)] dx I'm getting confused with how to deal with the x when I find the derivative of (x+1) because they don't match.
*February 12, 2015*

**Geometry B**

Find the exact length of the altitude drawn to the hypotenuse. Do not round. The triangle is not drawn to scale. A triangle with base measures of 9 & 17. Please help
*February 12, 2015*

**Calculus**

Suppose f"(x)=6x-2 A. If f'(1)=5, find f'(x). I got f'(x)=3x^2-2x+4 B. Fine the average rate of change of f on [-1,4]. C. Fine the value of x guaranteed by the mean value theorem for r on [-1,4]. D. If f(-1)=-2, find f(x) I am not sure how to do B, C, and D.
*February 12, 2015*

**physics**

A 3.6 kg rock is initially at rest at the top of a cliﬀ. Assume that the rock falls into the sea at the foot of the cliﬀ and that its kinetic energy is transferred entirely to the water. How high is the cliﬀ if the temperature of 1.1 kg of water is raised ...
*February 12, 2015*

**social studies **

the british commander at the battle of waterloo, lord wellington, once said that he would never attempt to write an account of the battle. why do you think he felt this way ?
*February 12, 2015*

**Calculus**

Integrate: Indefinite integral of [(sqrt(x))-1]^2 / [sqrt(x)] dx
*February 12, 2015*

**art**

Ms. Sue, thank you so much, I really appreciate your help! :D You are truly amazing, thanks again! :)
*February 12, 2015*

**art**

A conservator is working to restore a large marble statue from a Greek temple by scrubbing it with water and soap. What is a likely drawback to this preservation? A. Breaking of large sections of marble during scrubbing. B. Removing the aged look of the statue during scrubbing...
*February 12, 2015*

**physics**

while rowing in a race, john uses his arms to exert a force of 165 N per stroke while pulling the .80 m. how much work does he do in 30 stroke?
*February 12, 2015*

**Physics Dynamics**

A sled of mass m = 70.0 kg is being pulled horizontally on a frictionless floor by a force F = 420 N that makes an angle 20.0o above the horizontal. What is the magnitude of the normal force applied by the ground on the sled?
*February 12, 2015*

**Physics Dynamics**

A person stands on a bathroom scale in a motionless elevator. When the elevator begins to move, the scale briefly reads only 0.69 of the person's regular weight. Calculate the magnitude of the acceleration of the elevator.
*February 12, 2015*

**Physics Dynamics**

A child slides down a slide with a 24o incline, and at the bottom her speed is precisely one-third what it would have been if the slide had been frictionless. Calculate the coefficient of kinetic friction between the slide and the child.
*February 12, 2015*

**Physics Dynamics**

An arrow has an initial launch speed of 32 m/s. If it must strike a target 38 m away at the same elevation, what should be the projection angle?
*February 12, 2015*

**Physics Dynamics**

Swimming at 2.00 m/s relative to still water, a swimmer heads directly across a river of width 80 m. He arrives 35 m downstream from the point directly across the river from his starting point. (a) What is the speed of the current in the river? (b) At what angle relative to ...
*February 12, 2015*

**Quick english check**

Use the house on mango street, "No Speak English" to answer the following questions. Please correct me if I'm wrong. 1. Which of the following best illustrates the conflict between "mamacita" and her husband? A. "He worked two jobs. He came home ...
*February 12, 2015*

**Physics**

You are hitting a tennis ball against a wall. The 0.057-kg tennis ball traveling at 29 m/s strikes the wall and rebounds at the same speed. Earth is the object of reference. Determine the ball's change in momentum (magnitude).
*February 12, 2015*

**Physics**

An old building is being demolished by swinging a heavy metal ball from a crane. Suppose that such a 85kg ball swings from a 20-m-long wire at speed 10m/s as the wire passes the vertical orientation. What tension force must the wire be able to withstand in order not to break? ...
*February 12, 2015*

**Math**

It's not suppoesd to be a fraction!!
*February 12, 2015*

**Math**

What did he start with not left with plus he left with 120 dollars and he started with 3?I don't think that is resonable.
*February 12, 2015*

**Math**

How much did Aaron start with? Aaron spent 3/7 of his money. He gave ¼ of the remainder to his sister. He had $120 left. How much money did he have in the beginning? Explain how you got your answer. The way you solved this problem was wrong.Aaron did not start out with ...
*February 12, 2015*

**Science**

How does the sporophyte generation of a plant differ from the gametophyte generation? Use the words spores, sperm cells, and egg cells in your answer.
*February 12, 2015*

**art**

Florida virtual school does not give art text books.
*February 12, 2015*

**art**

Ms. Sue not all of us have books that's why we come to this site. Thank you for all your help and all others that take the time to help us. Have a great day.
*February 12, 2015*

**art**

Please don't get mad at me. Could it be D?
*February 12, 2015*

**art**

What factor might motivate a museum to hastily restore art without considering whether or not the restoration good for the piece? A. a freshly-restored artwork will last longer B. a freshly-restored artwork is easier to display C. a freshly-restored artwork will not spread ...
*February 12, 2015*

**math**

I mean 7/28 to 3/7
*February 12, 2015*

**math**

120.25 + 7/28
*February 12, 2015*

**art**

I completely agree with Ms. Sue. :)
*February 12, 2015*

**art**

An archeologist wants to dig up the burial site of a group of ancient Native Americans, to preserve the artifacts in a museum. What is the drawback for Native Americans to preserving these burial artifacts in a museum? A. The artifacts may not be properly preserved by the ...
*February 12, 2015*

**Math**

How much did Aaron start with? Aaron spent 3/7 of his money. He gave ¼ of the remainder to his sister. He had $120 left. How much money did he have in the beginning? Explain how you got your answer.
*February 12, 2015*

**Science**

Which of the following is true about diabetes? A. The pancreas overproduced glucose, and so insulin must be injected to reduce glucose levels. B. The pancreas underproduced glucose, and so insulin must be injected to increase glucose levels C. The pancreas overproduced insulin...
*February 12, 2015*

**math**

How much did Aaron start with? Aaron spent 3/7 of his money. He gave 3 of the remainder to his sister. He had $120 left. How much money did he have in the beginning? Explain how you got your answer.
*February 12, 2015*

**physics**

an object is projected with a velocity of 10m/s from the ground level at an angle to the vertically, the total time of flight of projectile os 10secs. calculate angle when (g=10m/s) show workings
*February 12, 2015*

**Art**

No problem at all, tell me how it goes ;)
*February 12, 2015*

**Art**

Hi Callie! I believe it's C. Just make sure with your textbook like Ms. Sue suggested. :) Hope this helps! ;)
*February 12, 2015*

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