Thursday

February 23, 2017
Total # Posts: 3,274

**physics**

Some kids playing at the park get creative, and they turn a seesaw into a trebuchet – they slide the plank until only 20 cm of its total length of 4 m extends from one side of the fulcrum. While bracing the system in a horizontal position, they place a 0.5 kg cantaloupe ...

*July 12, 2012*

**physics**

There are two spinning disks A and B arranged so that they initially are separated but can be pushed into contact. Disk A is made of a lighter material, so it has a moment of inertia that is one third that of disk B. Disk A starts off spinning at some ùi when the two ...

*July 12, 2012*

**physics**

A person is stretching by putting their arms straight over their heads and bending forward at their ankles until their hands are pushing against the wall in front of them. As they stretch, they keep stepping back from the wall, leaning further forward. The coefficient of ...

*July 12, 2012*

**physics**

An adult person is holding their arm straight out to their side. Their kid is hanging from their wrist, dangling. The kid has a mass of 20 kg. The length of adult’s arm between the shoulder and the wrist from which the kid is hanging is 0.7 m. The mass of the arm is 2.5 ...

*July 12, 2012*

**physics**

Io, one of the moons of Jupiter, circles Jupiter once every 1.77 days. The radius of its orbit is 4.22 X 108 m. If this orbit is circular, what is the mass of Jupiter?

*July 12, 2012*

**physics**

A distance of 1 m separates two objects, one with a mass of 2 kg and the other with a mass of 4 kg. A 0.5 kg mass is placed between them at the point where the net gravitational force generated by the other two masses is zero. How far is the 0.5 kg object from the 2 kg object?

*July 12, 2012*

**physics**

0.025560 or 2.56*10^-2 rad/s??

*July 12, 2012*

**physics**

A cylinder with a radius of 15 km is built in space for use as a space station. This cylinder is rotating about its long axis to generate ‘artificial gravity’. When people walk on the inner surface of the spinning cylinder, the normal force between their feet and ...

*July 12, 2012*

**physics**

A car going 30 m/s just barely makes it around a curve without skidding. This curve had a radius of 150 m. The next curve has a radius of 75 m. At what maximum velocity can it go around this curve without skidding?

*July 12, 2012*

**physics**

A car initially traveling at 26 m/s hits the brakes, generating a constant acceleration of -2 m/s2. Under this acceleration, the car comes to a rest. If the tires have radii of 0.33 m, how many revolutions does each tire make as the car slows down and stops? Assume no skidding.

*July 12, 2012*

**physics**

A 0.45 kg soccer ball approaches a player horizontally with a velocity of magnitude equal to 35 m/s. The player heads the ball straight back out horizontally, and the magnitude of the ball’s velocity after the collision is 40 m/s. The contact time between their head and ...

*July 12, 2012*

**physics**

it seems right, but the answer is 1120m/s?

*July 12, 2012*

**physics**

A 5 g bullet passes through a 1 kg wooden sign that was hanging at rest on a 0.2 m long rope. After passing through, the bullet loses half of its velocity, and the sign gains just enough velocity to swing around in a complete vertical circle. Assume that the rope is strong ...

*July 12, 2012*

**Physics**

Jack Sparrow swings on a 3 m long rope that was horizontal before he jumped from the boom of the Black Pearl. At the very bottom of his arc, he grabs Elizabeth Swann and they swing upward together. Sparrow (Depp) has a mass of 75 kg, and Swann (Knightley) has a mass of 50 kg (...

*July 12, 2012*

**Physics**

thank you so much!

*July 12, 2012*

**Physics**

A 1250 kg car rams into the back of a slower moving truck having a mass of 2500 kg. During the collision the two vehicles become entangled so that they move off together afterward. If before the collision the car was going 20 m/s and the truck was going 14 m/s, what was their ...

*July 12, 2012*

**MAth**

A sphere has a surface area of 28.26 in2. Find the diameter in inches, of the sphere. Use PI Question 2 What is the surface area, in square inches, of a sphere with radius 3.5 in.? Use Pi and round your answer to the nearest hundredth, if necessary. Question 3 Whats is the ...

*July 8, 2012*

**English**

I am trying to come up with a thesis for my english paper. It is going to be on Social class in Katherine Mansfields The Garden Party and A Cup of Tea. I want to show how both the upper class main characters take particular interest in the lower class characters. I came up ...

*July 5, 2012*

**English**

What do you mean? The last thing I added was just a note on what the social class during the 1900's (when the short stories were set) in Europe was like.

*July 5, 2012*

**English**

Also the upper class romanticises the lower class and lives in a "fake" reality

*July 5, 2012*

**English**

I am trying to come up with a thesis for my english paper. It is going to be on Social class in Katherine Mansfields The Garden Party and A Cup of Tea. I want to show how both the upper class main characters take particular interest in the lower class characters. I came up ...

*July 5, 2012*

**statistics**

In a police-involved domestic violence incident, a male perpetrator will be arrested if there is physical injury to the victim. Youth involved in the Boys and Girls Club will have increased academic success. Cancer patients who attend support groups will experience lower rates...

*July 5, 2012*

**MAth**

A cone has a base area of 33 in2 and is 8 inches tall. What is the volume of the cone in cubic inches

*July 5, 2012*

**calculus**

In the early 1960s, radioactive strontium-90 was released during atmospheric testing of nuclear weapons and got into the bones of people alive at the time. If the half-life of strontium-90 is 27 years, what fraction of the strontium-90 absorbed in 1962 remained in people's...

*July 3, 2012*

**MAth**

A right circular cylinder has a height of 5 in. and a base area of 20 in2. What is the volume of the cylinder? Use ð = 3.14.

*July 2, 2012*

**math**

four square tables are arranged next to each other to form one large rectangular table.the perimeter of the large rectangular table is 20m.what is the perimeter and area nof each square table?

*July 2, 2012*

**math**

A square pyramid has a surface area of 202 ft2 and a base area of 53 ft2. What is the lateral area of the pyramid? A.149 ft2 B.96 ft2 C.174 ft2 D.151 ft2

*July 1, 2012*

**Maths**

On August 1, 2011 Blancard Inc. Issued $250,000 of 10%, seven year bonds. Interest is to be paid semi-annully. Calulate the issue price of the bond if the market interest rate was 12%.

*July 1, 2012*

**geometry**

What is the surface area of a rectangular prism with a length of 12 cm, a width of 6 cm, and a height of 4 cm?

*July 1, 2012*

**US government**

thankyou !!

*June 29, 2012*

**US government**

Courts issued court orders, or (i-j--cti---), to make sure that people of color were allowed to vote. what is this word ???

*June 29, 2012*

**Trig**

Sketch the graph through at least one complete cycle. Label the axes on the coordinate plane. Use your graph to predict the height of point P above the surface of the water when the stopwatch shows 7 seconds. Round to the nearest tenth of a foot. (Enter only the number.)

*June 21, 2012*

**Trig**

P was at its maximum after 5 seconds. Use this information to write the value of the last constant, h. (If the value is a fraction, use a slash to separate the numerator from the denominator without spaces, such as 3/4.)

*June 21, 2012*

**Trigonometry**

The wheel makes 6 complete revolutions every 60 seconds. From this information, you can find the value of constant b. The constant is π/?. (Enter only the value that replaces the question mark.)

*June 21, 2012*

**Trigonometry**

Since the radius of the wheel is 7 feet, point P goes 7 feet above and below the center of the wheel. From this information, you can find the amplitude. Write the value of this constant.

*June 21, 2012*

**Trig**

Since the center is 6 feet above the water, the horizontal line of symmetry of the sine curve will be 6 units above the x-axis. This information helps you find the value of vertical shift. Write its value.

*June 21, 2012*

**Trig**

Jessica attains a height of 4.7 feet above the launch and landing ramps after 1 second. Her initial velocity is 25 feet per second. To find the angle of her launch, which equation can you use with the given information to solve for θ? (Answer: 1 or 2). Use the equation ...

*June 21, 2012*

**Calculus**

differentiate each function a) y = (cscx)(cotx) b) y = x^2 + e^(2x)

*June 21, 2012*

**Calculus**

Evaluate each limit. If it exists. a) Lim x^3 + 1 x->1 ------- x + 1 b) Lim 3x^2 - x^3 x->0 ---------- x^3 + 4x^2 c) Lim 16 - x x->16 --------- (√x) - 4

*June 21, 2012*

**Reading**

I need help with a assignment on a 150 to 300 words that summarizes the steps to be taken in the revision process.

*June 15, 2012*

**Update Math Question**

The area of triangle B is 64 times greater than the area of triangle A.The perimeter of triangle B is how many times greater than the perimeter of triangle A? how many times greater than the perimeter of triangle A? A. 8 times greater B.64 times greater C.128 times greater D....

*June 12, 2012*

**Math**

The perimeter of triangle B is how many times greater than the perimeter of triangle A?

*June 12, 2012*

**Math**

Rectangle ABCD is similar to rectangle EFGH. If rectangle ABCD has sides that are 7 times greater than those of rectangle EFGH, what is the relationship between the perimeters of the rectangles? A. The perimeter of rectangle EFGH is 7 times greater than the perimeter of ...

*June 11, 2012*

**geometery**

Rectangles ABCD and EFGH are similar. The perimeter of rectangle ABCD is 5 times greater than the perimeter of rectangle EFGH. What is the relationship between the areas of the rectangles?

*June 11, 2012*

**math**

A student notices that the shadows of a sign and a tree lie along the same line and end at the same point. The height of the sign is 3 feet. The length of the tree's shadow is 20 feet. The distance from the base of the sign to the vase of the tree is 16 feet. How tall is ...

*June 1, 2012*

**Science**

dna exists as _______ in cells with a______?

*May 29, 2012*

**Math**

1. Write the equation of a line in slope-intercept form that has a slope of -1/4 and passes through the point (8, -1).Do not use any spaces. Slope should be a reduced improper fraction. 2.Write the equation of a line in slope-intercept form that passes through the points ( -2...

*May 25, 2012*

**Health**

Is it B ms sue

*May 24, 2012*

**physics**

For long range communication an elephant uses a low frequency rumble that is undetectable to human ears. One elephant can pick up another elephant's call from a distance of 10 km. The frequency of this rumble is about 13 Hz. How fast does the rumble travel?

*May 22, 2012*

**Math plz help**

I need help I don't know how to begin the equation Michael purchased a certain number of share of one stock for a total of $2800. The second stock was selling for $6 less per share . Michael could have bought 6 more shares of the second stock for the same amount of money. ...

*May 21, 2012*

**Business Finance**

On May 12, Bob Campbell accepted a $5,000 note in granting a time extension of a bill of goods bought by Rick Ween. Terms of the note were 8% for 120 days. On July 8, Bob needed to raise cash and discounted the note at Rick's bank at a discount rate of 9%. Calculate Bob&#...

*May 19, 2012*

**Business Finance**

Jeff Jones earns$1200 per week. He is married and claims four withholding allowances. The FICArate is as follows 1.45%. To date his cumulative wages are $6000. Each paycheck, his employer also deducts $42.50 for health insurance. What is his net pay?

*May 19, 2012*

**english11**

journal about pirates

*May 16, 2012*

**Chemistry**

DrBob... Could you explain how you got negative...I thought E = reduced - oxidized E = 0.34 V - (-0.74 V) = 1.08 V

*May 15, 2012*

**Physics**

0.224468

*May 13, 2012*

**math**

The probability that a team will carry the puck over the opposing team's blue line is 0.6, the probability that they get a shot on the net is 0.3, the probability that they get a shot away and score is 0.01 and the probability that they cross the blue line and score is 0....

*May 10, 2012*

**Nutrition**

Read this summary and then answer the questions. This is Tyler's freshman year in college, and he has been earning good grades and performing well in his part-time job. However, Tyler's eating habits have been poor, and has gained a few pounds. His expanded waistline ...

*May 5, 2012*

**math**

terms are the numbers and their variable as if you just take the addition signs out so your terms would be -7x^3 6x^2 6x 9 hope this helps :)

*May 5, 2012*

**medical terminology**

I need the medical report written out,I don't know how to write it..

*May 5, 2012*

**medical terminology**

Making use of the following terms, write a fictitious medical report of about two paragraphs describing a dermatologic condition or disease. Focus the report on the onset, progression, location, and etiology of the condition or disease, and the treatment parameters. All terms ...

*May 5, 2012*

**algebra**

haley = h brother = b h < 2b incorperate your numbers 5 < 2b (this is the equation I would use)

*May 5, 2012*

**Math**

if it is a tank with 4 sides then you would simply do 6 multiplied by 40 which equals 240 and then multiple 240 by 4 which equals 960. 6 * 40 = 240 240 8 4 = 960 960 squared feet hope this helps :)

*May 4, 2012*

**physics**

A rope of mass 0.78 kg is stretched between two supports 31 m apart. If the tension in the rope is 1800.0 N, how long (in seconds) will it take a pulse to travel from one support to the other

*May 3, 2012*

**geometry**

If a circle has an area of 25 pi cm squared, find the circumference of the circle? a. 5 squared cm b. 10 squared cm c. 50 sqaurred cm d. 156.25 squared cm

*May 3, 2012*

**Math 3**

line equals (1,-3)

*May 2, 2012*

**chemistry**

For the strong acid solution 9.7×10−3 , determine (H3o+)and (OH-)

*May 2, 2012*

**chemistry**

For the strong acid solution 9.7×10−3 , determine (H3o+)and (OH-)

*May 2, 2012*

**Algebra**

Andrew measures the amount of a very unstable substance to be 100 moles. The half-life of this substance is 3 days (after 3 days, half is gone). Write an exponential function that models this situation where y is the amount of substance and x is time in days. Thank you for ...

*May 1, 2012*

**Math :(**

Thanks :)

*April 30, 2012*

**Math :(**

Gil rolls a number cube 78 times. How many times can he expect to roll an odd number greater than 1??

*April 30, 2012*

**math**

A baseball player reaches base 35% of the time. How many times can he expect to reach base in 850 at-bats?

*April 30, 2012*

**math**

Put 18/1 and then multiply 18/1 x 4/6= 72/6 and simplify to 12 :)

*April 30, 2012*

**Science**

C is correct :)

*April 30, 2012*

**math**

The side that connects all of the points is the base.

*April 30, 2012*

**Science**

Vanessa pushes a box with 50 N of force. The box accelerates 2 m/s2 for 10 seconds. What is the mass of the box?

*April 29, 2012*

**Grade 8 Math**

Double the sum of 5 and a number is 70

*April 29, 2012*

**science**

write a skeleton equation for this reaction hydrogen iodide(g)->hydrogen+iodide(G)

*April 29, 2012*

**chemistry**

A scuba diver takes a 2.3L balloon from the surface, where the pressure is 1.0atm and the temperature is 37degrees C, to a depth of 35m, where the pressure is 4.5atm and the temperature is 18degrees C.what is the final volume at this depth?

*April 28, 2012*

**chemistry**

How many grams of hydrogen are collected in a reaction where 1.80L of hydrogen gas is collected over water at a temperature of 40degrees C and a total pressure of 738torr?

*April 28, 2012*

**Chemistry**

A heliox deep-sea diving mixture delivers an oxygen partial pressure of 0.20 atm when the total pressure is 13.0atm .What is the partial pressure of helium in this mixture?

*April 27, 2012*

**Physics**

A rock is thrown horizontally off of a cliff. It starts with a velocity of 4.2 m/s and the cliff is 68.2 m high. How far out from the bottom of the cliff does the rock fall? 57m 59m 63m 45.8m

*April 26, 2012*

**english**

What elements of the Restoration comedy are seen in The Importance of Being Earnest? (5 points)

*April 25, 2012*

**english**

The procession was temporarily abolished because of the emperor’s interest in _____ (1 point) A.wars. B.viands. C.bicycles. D.poisons.

*April 25, 2012*

**Pre-Algebra**

The grocery store sells kumquats for $4.25 a pound and Asian pears for $2 a pound. Write an equation in standard form for the weights of kumquats k and Asian pears p that a customer could buy with $12.

*April 25, 2012*

**Basic Dressmaking Processes**

You guys are awesome thank you so much !!! I got a 100 on my test thank you again

*April 24, 2012*

**Enviro Science**

#4: D because slippage makes a rumble and also creates a crack in the earth surface. :)

*April 24, 2012*

**english**

The procession was temporarily abolished because of the emperor’s interest in _____ (1 point)

*April 23, 2012*

**Trigonometry**

A ladder leaning against a building makes a 40 degree angle with the ground. The top of the ladder reaches 10 feet above the ground. How tall is the ladder to the nearest whole foot?

*April 23, 2012*

**geometry**

Hexagon A is a regular hexagon. The total length of all the sides of the hexagon is 24 inches. Hexagon A is dilated about its center to create Hexagon B. The length of each side of Hexagon B is inches. By what factor was Hexagon A dilated to create Hexagon B?

*April 22, 2012*

**Math**

Jnuary 1, 1990 was a Monday. What day of the week was february 1, 1990 ?

*April 21, 2012*

**Math**

Jan and Nika ride their bikes. Jan rides 5 miles per hour for 1 hour then rides at ten miles per hour for 30 minutes.Nika rides at a constant 8 miles per hour. the tripss cover the ssme distance. Forr hoew many minutes does Nika ride ?

*April 21, 2012*

**American Government**

Ms Sue can you still help me?

*April 17, 2012*

**American Government**

yeah that was good... thank you.. can you help me with number 2?

*April 17, 2012*

**American Government**

Thats the problem, I don't know how to do it.

*April 17, 2012*

**American Government**

1. Justice Stephen Breyer stated, “people need to understand the importance of the Court as an institution, even though the Court’s decisions may at times be unpopular and possibly wrong,” Explain how this statement relates to the concepts of “Judicial ...

*April 17, 2012*

**American Government**

I know I tried but I can't get it together...

*April 17, 2012*

**American Government**

Its supposed to be an essay, between 600 to 700 words, all together, But I can't find how to do it, I tried but american government its not a stong subject for me. Can you help?

*April 17, 2012*

**American Government**

Yes

*April 17, 2012*

**American Government**

1. Justice Stephen Breyer stated, “people need to understand the importance of the Court as an institution, even though the Court’s decisions may at times be unpopular and possibly wrong,” Explain how this statement relates to the concepts of “Judicial ...

*April 17, 2012*

**Math**

It is given that the straight line passing through (2,1)and perpendicular to L.

*April 12, 2012*