Thursday

March 26, 2015

March 26, 2015

Total # Posts: 336

**math**

75=m/3+10
*February 24, 2015*

**chemistry**

The specific heat of iron is 0.498 J/g °C. If 341 J of heat is added to 154.1 g of iron at 25.0 °C, what is the new temperature of the iron?
*February 11, 2015*

**chemistry**

A block of metal is 6.88 cm long, 2.03 cm wide, and 1.85 cm high. It has a mass of 215.1 grams. What is the density of this metal. I've tried adding all the cm up and squaring them, dividing them, multiplying but i can't get the answer
*February 6, 2015*

**Physics**

PHYS1111_HMWK02_Vectors_and_2DKinematics » Eddie the Eagle Eddie the Eagle, British Olympic ski jumper, is attempting his most mediocre jump yet. After leaving the end of the ski ramp, he lands downhill at a point that is displaced 62.2 m horizontally from the edge of ...
*February 2, 2015*

**Physics**

A golfer, standing on a fairway, hits a shot to a green that is elevated 5.50 m above the point where she is standing. The ball leaves her club at an angle of 37.0° above the ground, with a speed of 31.1 m/s. Find the time that the ball is in the air before it hits the ...
*February 2, 2015*

**Physics**

Three vectors of lengths A = 45.6, B = 24.2, and C = 30.4. The angles are θa = 29.6° and θb = 57.5°, and C points along the negative y-axis. Determine the length of the vector A - C. Calculate the angle of this vector. Determine the length of the vector A - B...
*February 1, 2015*

**Math**

Hello! Can someone help me with this? Directions: Solve the equation sin^2x-sinx=2 Location on Unit Ciricle: Period: General Solution:
*January 26, 2015*

**Math Homework Help**

Hello! I'm having problems with these two math problems. I've tried to solve them but I got nowhere. If someone could please help me, that would great! Thanks again! :) Directions: Verify the identity for each problem. 1.) cot^2y(sec^2-y-1)=1 2.) cosx+sin xtan x=sec x
*January 18, 2015*

**Physics**

How fast would a 4.8 kg object slide down a frictionless incline of 10.3 degrees?
*January 7, 2015*

**calculus**

A rectangular fence has to be built from both wood and metal so that opposite parallel sides of the fence are made from the same type of material. The wood costs $10 per foot and the metal costs $20 per foot of the fence used. If you only have $400 to spend on material, what ...
*December 8, 2014*

**Physics**

Starting from rest, a speedboat reaches a speed of 2.8 m/s in 2.7 s. What is the boat's speed after an additional 3.7 s has elapsed, assuming the boat's acceleration remains the same?
*October 8, 2014*

**Chemistry, empirical formula**

Na3PO4
*September 23, 2014*

**Phsics**

A crate weighing 600. N is being pulled across the floor. You pull up and to the right on a rope which is attached to the crate. You exert a force of 155 N at an angle θ=29.0° above the horizontal.
*September 15, 2014*

**algebra**

One morning, Justin drove 5 hours before stopping to eat lunch at Pizza Hut. After lunch, he increased his speed by 10 mph. If he completed a 350-mile trip in 8 hours of driving time, how fast did he drive in the morning?
*September 9, 2014*

**algebra**

A garden hose can fill a swimming pool in 7 days, and a larger hose can fill the pool in 4 days. How long will it take to fill the pool if both hoses are used?
*September 9, 2014*

**algebra**

How many mL of a 60% acid solution must be mixed with a 20% acid solution to produce 200 mL of a 50% acid solution?
*September 9, 2014*

**algebra**

Adult tickets to a play cost $2.25 each and student tickets cost $1.75 each. Suppose there are twice as many student tickets sold as adult tickets. If the income from the play was $1,150, how many of each type of ticket were sold?
*September 9, 2014*

**Health question**

the answer was A
*May 8, 2014*

**physics**

Which of the following statements about a system in resonance is true A.The energy of the system is always increasing. B.The greater the damping the larger the amplitude of the oscillations C.The driving force is always in the direction of the velocity. D.The frequency of the ...
*April 16, 2014*

**physics**

A small object is attached to the end of a horizontal spring at position x = 0. It is the pulled to position x = A and released. In one full cycle of its motion, the total distance traveled by the object is...
*April 13, 2014*

**physics**

A block is attached to a horizontal spring and set in simple harmonic motion, as shown in the figure. At what point in the motion is the speed of the block at its maximum? The position of the block when the spring is relaxed is marked by x = 0, and the extremes of the block\&#...
*April 11, 2014*

**physics**

An object-–spring system undergoes simple harmonic motion. If the mass of the object is doubled, what will happen to the period of the motion?
*April 11, 2014*

**physics**

A 0.527 kg metal cylinder is placed inside the top of a plastic tube, the lower end of which is sealed off by an adjustable plunger, and comes to rest some distance above the plunger. The plastic tube has an inner radius of 7.07 mm, and is frictionless. Neither the plunger nor...
*April 11, 2014*

**physics**

Given that the small piston has a radius of 0.0330 meters^2 and the large piston has a radius of 4.00 meters^2. (a) What force will the large piston provide if the small piston is pushed down with a force of 17.0 N?. (b) If the small piston is slowly depressed a distance of y1...
*April 10, 2014*

**physics**

Bird bones have air pockets in them to reduce their weight–this also gives them an average density significantly less than that of the bones of other animals. Suppose an ornithologist weighs a bird bone in air and in water and finds its mass is 43.0 g and its apparent ...
*April 10, 2014*

**physics**

A 0.527 kg metal cylinder is placed inside the top of a plastic tube, the lower end of which is sealed off by an adjustable plunger, and comes to rest some distance above the plunger. The plastic tube has an inner radius of 7.07 mm, and is frictionless. Neither the plunger nor...
*April 10, 2014*

**physics**

A 0.527 kg metal cylinder is placed inside the top of a plastic tube, the lower end of which is sealed off by an adjustable plunger, and comes to rest some distance above the plunger. The plastic tube has an inner radius of 7.07 mm, and is frictionless. Neither the plunger nor...
*April 10, 2014*

**science**

a 1.0 kg metal head of a geology hammer strikes a solid rock with a speed of 3.9 m/s. assuming all the energy was retained by the hammer head, how much will its temperature increase?
*April 8, 2014*

**science help pleasee**

I know it's a bit late. I could be wrong, but I'm fairly sure it's hydrogen bonding.
*March 19, 2014*

**Accounting**

I really need a lot of help learning how to understand and successfully fill out an income statement packet, ASAP please!!
*March 19, 2014*

**Business **

I really need help learning how to understand & fill out an income statement packet, ASAP!
*March 19, 2014*

**statistics**

a large shipment of computer chips, of which 5% are actually defective, a quality control manager decides to test chips until he finds the first defective. What is the probability that the manager finds the first defective chip on the first test? in Homework Help
*March 7, 2014*

**Math**

if you are given two points and the slope formula of m=(y1-y2)/(x1-x2), does it matter which point is (x1, y1) and which point is (x2, y2)?
*February 26, 2014*

**English**

When writing an essay make sure that you do not use the word I a lot so that your paper keeps the attention of your audience.
*February 26, 2014*

**HR LAW**

Hannah Bing was hired by Friendly Cab Company. The employee handbook stated that employeees would only be terminated for good cause. Hannah was fired and replaced with her supervisor's neice. Hannot cannot file a wrongful discharge lawsuit against Friendly catering company...
*February 6, 2014*

**math**

Tanya has 4 red marbles, 7 blue marbles, and 8 green marbles. Which expression can be used to find the percent of Tanya's marbles that are blue?
*January 29, 2014*

**science**

Please help!!!! Explain how mutations in DNA may affect the traits of an individual
*November 22, 2013*

**chemistry**

Is CO2 a product of an acid/base reaction?
*November 12, 2013*

**math**

Real world problem were you multiply 120and75
*November 5, 2013*

**math**

Monday and Tuesday and Wednesday
*September 25, 2013*

**Math**

Multiply 1. (1.2z)(-4+2y) 2. (-2e - 3f +4)(-e) 3. (7v)(-7v-7x) 4. (-4x) (-7+3y) 5. (b)(-0.1a + 8b-0.7c) please help me, I have done these questions but im pretty sure my answers are wrong, so can someone do these or help me so i can understand how to do this, thanks :)
*June 9, 2013*

**Math**

Thank you so much :)
*June 2, 2013*

**Math**

Joe weighs 30 lbs less than twice ken's weight. If ken gains 10 pounds then together they would weigh 250 pounds. How much does each of them weigh? let x be ken's weight. my work: 2x - 30 = j x+ 10 + J = 250 and now im stuck, can someone show me how to find their ...
*June 2, 2013*

**Math**

im confused can you explain a little more cause i need a full equation and im really confused
*June 1, 2013*

**Math **

Joe weighs 30 lbs less than twice ken's weight. If ken gains 10 pounds then together they would weigh 250 pounds. How much does each of them weigh? let x be ken's weight. thanks
*June 1, 2013*

**Chemistry**

Describe the subatomic structure of the nucleus, including the structure of each nucleon. Draw a picture. Describe the forces that hold the nucleus together and draw them on your diagram. Explain how beta emission works.
*May 24, 2013*

**math**

Explain how to factor 5x^2 - 125.
*May 15, 2013*

**French**

How do you unscramble o'ceisoubellreld.
*April 23, 2013*

**math sale taxes**

Eva is making copies of her choir's performance schedule. The total bill for the copies Eva made came to $48.00 plus 8% tax. How much tax did she pay?
*April 3, 2013*

**Math**

Quentin has 18 unit cubes. How many different rectangular prisms can he build if he uses all of the cubes.
*March 19, 2013*

**math**

How do I find the decimal equivalent of the fraction 9/4?
*February 28, 2013*

**math**

Write an explicit formula for the sequence one-half, three-sevenths, one-third, five-nineteenths, three-fourteenths, ... Then find a14. (1 point) an = an – 1 – n minus one over seven n; fifteeen over one hundred nintey nine an = a sub n plus one over n squared plus ...
*February 26, 2013*

**math**

Generate the first five terms in the sequence using the explicit formula. cn= 12n – 11 (1 point)
*February 26, 2013*

**Chemistry**

27.32
*February 13, 2013*

**physics**

A boy sledding down a hill accelerates at 1.20 m/s2. If he started from rest, in what distance would he reach a speed of 6.10 m/s?
*January 29, 2013*

**calculus**

Find the values of x for which each function is continuous. 1.) f(x)= 2x+1/x^2+x-2 2.) f(x)= x if x is less than or =1 = 2x-1 if x>1
*January 27, 2013*

**calculus**

Determine the values of x, if any, at which each function is discontinuous. At each number where f is discontinuous, state the condition(s) for continuity that are violated. f(x) = x+5 if x<0 = 2 if x=0 = -x^2+5 if x>0
*January 27, 2013*

**Calculus**

How did you find that it was continuous?
*January 27, 2013*

**Calculus**

Determine the values of x, if any, at which each function is discontinuous. At each number where f is discontinuous, state the condition(s) for continuity that are violated. f(x)= x+5 if x is less than or =0 -x^2+5 if x>0
*January 27, 2013*

**math calculus **

. Folding a Pyramid - A pyramid with a square base and four faces, each in the shape of an isosceles triangle, is made by cutting away four triangles from a square piece of cardboard and bending up the resulting triangles to form the walls of the pyramid. What is the largest ...
*December 3, 2012*

**math calculus **

. Folding a Pyramid - A pyramid with a square base and four faces, each in the shape of an isosceles triangle, is made by cutting away four triangles from a square piece of cardboard and bending up the resulting triangles to form the walls of the pyramid. What is the largest ...
*December 3, 2012*

**math calculus **

. Folding a Pyramid - A pyramid with a square base and four faces, each in the shape of an isosceles triangle, is made by cutting away four triangles from a square piece of cardboard and bending up the resulting triangles to form the walls of the pyramid. What is the largest ...
*December 3, 2012*

**math calculus **

. Folding a Pyramid - A pyramid with a square base and four faces, each in the shape of an isosceles triangle, is made by cutting away four triangles from a square piece of cardboard and bending up the resulting triangles to form the walls of the pyramid. What is the largest ...
*December 3, 2012*

**math calculus **

. Folding a Pyramid - A pyramid with a square base and four faces, each in the shape of an isosceles triangle, is made by cutting away four triangles from a square piece of cardboard and bending up the resulting triangles to form the walls of the pyramid. What is the largest ...
*December 3, 2012*

**math calculus **

. Folding a Pyramid - A pyramid with a square base and four faces, each in the shape of an isosceles triangle, is made by cutting away four triangles from a square piece of cardboard and bending up the resulting triangles to form the walls of the pyramid. What is the largest ...
*December 3, 2012*

**math calculus **

. Folding a Pyramid - A pyramid with a square base and four faces, each in the shape of an isosceles triangle, is made by cutting away four triangles from a square piece of cardboard and bending up the resulting triangles to form the walls of the pyramid. What is the largest ...
*December 3, 2012*

**math calculus **

. Folding a Pyramid - A pyramid with a square base and four faces, each in the shape of an isosceles triangle, is made by cutting away four triangles from a square piece of cardboard and bending up the resulting triangles to form the walls of the pyramid. What is the largest ...
*December 3, 2012*

**math calculus **

. Folding a Pyramid - A pyramid with a square base and four faces, each in the shape of an isosceles triangle, is made by cutting away four triangles from a square piece of cardboard and bending up the resulting triangles to form the walls of the pyramid. What is the largest ...
*December 3, 2012*

**math calculus **

. Folding a Pyramid - A pyramid with a square base and four faces, each in the shape of an isosceles triangle, is made by cutting away four triangles from a square piece of cardboard and bending up the resulting triangles to form the walls of the pyramid. What is the largest ...
*December 3, 2012*

**math calculus **

. Folding a Pyramid - A pyramid with a square base and four faces, each in the shape of an isosceles triangle, is made by cutting away four triangles from a square piece of cardboard and bending up the resulting triangles to form the walls of the pyramid. What is the largest ...
*December 3, 2012*

**math calculus **

. Folding a Pyramid - A pyramid with a square base and four faces, each in the shape of an isosceles triangle, is made by cutting away four triangles from a square piece of cardboard and bending up the resulting triangles to form the walls of the pyramid. What is the largest ...
*December 3, 2012*

**math calculus **

. Folding a Pyramid - A pyramid with a square base and four faces, each in the shape of an isosceles triangle, is made by cutting away four triangles from a square piece of cardboard and bending up the resulting triangles to form the walls of the pyramid. What is the largest ...
*December 3, 2012*

**math calculus **

. Folding a Pyramid - A pyramid with a square base and four faces, each in the shape of an isosceles triangle, is made by cutting away four triangles from a square piece of cardboard and bending up the resulting triangles to form the walls of the pyramid. What is the largest ...
*December 3, 2012*

**math calculus **

. Folding a Pyramid - A pyramid with a square base and four faces, each in the shape of an isosceles triangle, is made by cutting away four triangles from a square piece of cardboard and bending up the resulting triangles to form the walls of the pyramid. What is the largest ...
*December 3, 2012*

**math calculus **

. Folding a Pyramid - A pyramid with a square base and four faces, each in the shape of an isosceles triangle, is made by cutting away four triangles from a square piece of cardboard and bending up the resulting triangles to form the walls of the pyramid. What is the largest ...
*December 3, 2012*

**math calculus **

. Folding a Pyramid - A pyramid with a square base and four faces, each in the shape of an isosceles triangle, is made by cutting away four triangles from a square piece of cardboard and bending up the resulting triangles to form the walls of the pyramid. What is the largest ...
*December 3, 2012*

**Chemistry**

If an object weighs 1.32 g/mL will it float or sink in water?
*November 7, 2012*

**Chemistry**

Dr. Bob, When I use the values that I have for latent heat of fusion and vaporization, I do not get the right answer. I have that latent heat of vaporization is 597.3 - 0.564T, and latent heat of fusion is 79.7 cal/gH2O.
*November 3, 2012*

**Chemistry**

A 500 mL bottle at room temperature (25˚C) of water is poured over 120 g of ice that is (-8˚C). What will be the final temperature of the water be when all the ice has melted? You can ignore loss of heat to the room.
*November 3, 2012*

**physics**

You are explaining to a friend why the crew of the International Space Station feels weightless while orbiting the Earth. Your friend responds that he thought gravity was just a lot weaker up there. Show that it isn’t so by calculating the acceleration due to gravity 350 ...
*October 23, 2012*

**math**

Write the equation of the quadratic function with roots -2 and 4 and a vertex at (1, 9).
*October 23, 2012*

**input/output tables**

I have a blank table to fill in.It says divide m by 3 m÷3
*October 22, 2012*

**trig**

A woman that is 5'4" stands 15 ft from a streetlight and casts a four-foot long shadow. Determine the height of the streetlight and the degree measure of the angle of elevation form the tip of her shadow to the top of the streetlight, both accurate to two decimal places.
*September 23, 2012*

**Chemistry**

Hydrated copper sulfate is heated. Using the speculative chemical equation CuSO4*5H2O-->CuSo4+5H2O, show how you could have predicted, by calculations, what the final weights in the crucibles might be. Show calculations for two starting weights between 1 and 4 grams.
*September 6, 2012*

**AP Physics**

thank you! the answer was 96.3
*August 30, 2012*

**AP Physics**

Consider the vectors A = 2.00 i + 7.00 j and B = 3.00 i - 2.00 j. (a) Sketch the vector sum C = A + B and the vector subtraction D = A - B. (b) Find analytical solutions for C and D first in terms of unit vectors and then in terms of polar coordinates, with angles measured ...
*August 30, 2012*

**Physics**

A block of iron at 39.0°C has mass 2.30 kg. If 3.50×104 J of heat are transferred to the block, what is its resulting temperature?
*June 20, 2012*

**Geometry**

Triangle RSU has two of its points(R and S) on the sides of a circle. Line SU forms a secant ray that passes through the diameter of the circle. Angle S is 30 degrees, the measure of arc RS is 84 degrees, and RU is tangent to the circle at R. Find the measure of angle U. 27&...
*May 22, 2012*

**physics**

The three charges shown in Figure P16.17 are at the vertices of an isosceles triangle. If q = 16.0 10-9 C, calculate the electric potential at the midpoint of the base. V Figure P16.17
*May 15, 2012*

**Math**

The present value of the money in your savings account is $420, and you're receiving 3% annual interest compounded monthly. What is the future value in two months?
*May 4, 2012*

**calculus**

A drone aeroplane is flying horizontally to a constant height of 4000 ft above a fixed radar tracking station. At a certain instant the angle of elevation theta is 30 degrees and decreasing, and the speed of the aeroplane is 300 mi/h a) How fast is theta decreasing at this ...
*April 24, 2012*

**chemistry**

What is the molarity of a solution if 255g NaNO3 is dissolved in 1500 mL of solution
*April 3, 2012*

**Math 11**

701.53cm
*March 29, 2012*

**criminal justice**

I bet you go to Liberty
*March 25, 2012*

**physics**

A 350g glass beaker contains 500g of water at a temperature of 10.0°C. If 400g of ethyl alcohol at 35°C is subsequently poured into the beaker and the water and alcohol mixture is thoroughly stirred, what is its equilibrium temperature?
*March 22, 2012*

**math**

h worked the following problem incorrectly. Part 1) In which line was the mistake made? Part 2) Show your work and give the correct answer? Line 1 40 ÷ 5(3 − 1) − 4 Line 2 40 ÷ 5(2) − 4 Line 3 40 ÷ 10 − 4 Line 4 4 − 4 Line 5 0
*March 21, 2012*

**Chemistry(Urgent, please respond, thanks!!)**

0.500
*March 14, 2012*

**Government--Please Check**

I'm not guessing, and why did you put Abigail/paige??
*March 13, 2012*

**Government--Please Check**

In the case McCulloch v. Maryland, the Supreme Court held that _____. My answer1.)the Necessary and Proper Clause gave the federal government broad rights not mentioned in the Constitution 2.)federal government could not create a national bank 3.)the Bill of Rights implies a ...
*March 13, 2012*