Thursday

July 24, 2014

July 24, 2014

Total # Posts: 299

**physics**

98. On which of these hills does the ball roll down with increasing speed and decreasing acceleration along the path? (Use this example if you wish to explain to someone the difference between speed and acceleration.) 99. If you drop an object, its acceleration toward the grou...

**algebra**

Determine the value of each expression 25% of 200

**English**

How could you use the words feel and turn as a linking verb?

**5th grade math help**

make the mixed number an IMPROPER FRACTION,and multiply using 2/3 reciprocal being 3/2 multiply simplify see if you can simplify again

**physics**

A vertical scale on a spring balance reads from 0 to 220N . The scale has a length of 15.0cm from the 0 to 220N reading. A fish hanging from the bottom of the spring oscillates vertically at a frequency of 2.45Hz . Part A Ignoring the mass of the spring, what is the mass m of ...

**Physics**

The equation of motion for an oscillator in vertical SHM is given by y=(0.60m)sin[(130rad/s)t]. Part A What is the amplitude of this motion? Part B What is the frequency of this motion? Part C What is the period of this motion?

**Materials Transport**

You have a kiln where theinterior is a cube with an edge length of 30 cm. The walls of the kiln are made of an insulating refactory, and are 10 cm thick. The thermal conductivity of the refractory is .06 W/mK. The interior of the kiln is at a temperature of 1250 degrees C, and...

**Statistics**

of 500 randomly selected people in new york city, 210 people had O+ blood. a) "42 percent of the people in NYC have O+ blood" Is the statement descriptive statistics or inferential statistics?

**physics**

A 72.5 kg skier is going straight down a 31.1o slope. Each ski has a contact area with the snow of 0.137 m2. Calculate the pressure that the snow exerts on each ski.

**College anatomy**

It was observed that blood glucose levels were falling in an individual. This event would be sensed by (a) cells in the (b) of the pancreas, causing them to release the hormone (c). This series of events would be part of an (d) loop/mechanism, serving as a self-adjusting mecha...

**chemistry **

Calculate the partial pressure of propane in a mixture that contains equal numbers of moles of propane (C3H8) and butane (C4H10) at 20 °C and 616 mmHg. (R=0.082 L-atm/K mol)

**chemistry **

Calculate the partial pressure of propane in a mixture that contains equal numbers of moles of propane (C3H8) and butane (C4H10) at 20 °C and 616 mmHg. (R=0.082 L-atm/K mol)

**chemistry **

Calculate the partial pressure of propane in a mixture that contains equal numbers of moles of propane (C3H8) and butane (C4H10) at 20 °C and 616 mmHg. (R=0.082 L-atm/K mol)

**physics**

A merry-go-round makes 23 revolutions in a 2.8min ride. Part A What is its average angular speed in rad/s?

**physics**

The driver of a car sets the cruise control and ties the steering wheel so that the car travels at a uniform speed of 14m/s in a circle with a diameter of 100m . Part A Through what angular distance does the car move in 4.00min ?

**physics**

A baseball player pops a pitch straight up. The ball (mass 230g ) was traveling horizontally at 36.0m/s just before contact with the bat, and 21.0m/s just after contact. Part A Determine the magnitude of the impulse delivered to the ball by the bat. Part B Determine the direct...

**physics**

How much power must you exert to horizontally drag a 21.0kg table 15.0m across a brick floor in 20.0s at constant velocity, assuming the coefficient of kinetic friction between the table and floor is 0.500?

**physics**

The acceleration due to the moon's gravity at its surface is less than what it is here on the surface of the earth. The computed value of 1.6 m/s2 is consistent with what the Apollo Program astronauts observed during their explorations there. Imagine an astronaut holding a...

**Stats**

For X ∼ Poi(λ), show that E(X) = λ and V ar(X) = λ. (Hint: Find E[X(X − 1)] = E(X2 ) − E(X).)

**Stats**

The Geometric distribution is used when we want to ﬁnd the probability of performing a sequence of trials with X “failures” before the ﬁrst “success”, where a “success” occurs with some probability p. We can denote such a random vari...

**human resources**

What is the difference between executive pay and non executive pay and controversies are associated with the disparity between them?

**math**

can anyone try this one

**math **

Find the area of the segment of the circle. Leave your answer in terms of pi. there is a circle with a shaded area that has a 90 degree triangle in it and a 3 next to one soide of the triangle

**social studies**

thank you so much but i found the answer

**social studies**

Why did pilgrims travel? a. to fight a holy war b. to organize followers c.to pay tribute to a king d. to visit holy places

**Calculus please help !**

Find the coordinates of the center of the ellipse represented by 4x^2 + 9y^2 – 18y – 27 = 0. For 2x^2 + xy + 2y^2 = 1, find , the angle of rotation about the origin, to the nearest degree. Find the distance between points at (–1, 6) and (5, –2). Identify th...

**Pre-calculus HELP PLEASE !**

(2/9, -1 2/4) ? d=10 ellipse ?

**Pre-calculus HELP PLEASE !**

Find the coordinates of the center of the ellipse represented by 4x^2 + 9y^2 – 18y – 27 = 0. For 2x^2 + xy + 2y^2 = 1, find , the angle of rotation about the origin, to the nearest degree. Find the distance between points at (–1, 6) and (5, –2). Identify th...

**Algebra**

Two questions I need help with. Find the indicated partial sum using the information given. 1. a3=4/9, a7=9/64, S6 Determine wheater the infinite geometric series has a finite sum 2. 6+ 3+ 3/2 + 3/4 +.... 3. -49 + (-7) + (- 1/7) +...

**Help! Algebra **

Find the common ratio r and the value of A1 with the information given. 1. A3=324 A7=64 2. A4=32/3 A8=54

**Math**

If the floor plan of a new building is shown the building cost $35.00 a saqure foot to construct you need to obtain insurance for the new building .how much insure?

** Reiny please help!Algebra **

I need help with these! I got B for 1. C for 2. and D for 3. Thanks for the help! 1.) Find the values of a, b, and c that will make the statement true. [5 a -2] [5 102] [3 4 –b] = [-3 -4 3] [2c 5 9] [-2 5 9] a.) 8R1-R2--> =R2 b.) -8R1-R2 -> =R2 c.) –8R1 +R2 -&g...

**Algebra multiple choice! **

I have a few questions I need help with! Please explain if my answer was not right how you got to it. I got 1.) B 2.) A 3.) C 1. Solve the system by triangularizing the augmented matrix and using back substitution. If the system is linearly dependent, give the solution in term...

**Algebra help!**

1.) Solve the system by triangularizing the augmented matrix and using back substitution. -x-y+z=1 x-y-4z=-7 4x+y+z=6 2.) Perform the indicated row operation, then write the new matrix. -4 4 | 4 9 -6 | 5 -2R1+ R2 ---> R2 3.) Solve the system by triangularizing the augmented...

**Pre-calculus; urgent ! Please help !**

1.Graph the polar equation r=3-2sin(theta) 2. Find the polar coordinates of 6 radical 3,6 for r > 0. 3. Find the rectangular coordinates of (7, 30°). 4. Write the rectangular equation in polar form. (x – 4)2 + y2 = 16 5. Write the equation –2x + 6y = 7 in pola...

**Calculus please help !**

1.Graph the polar equation r=3-2sin(theta) 2. Find the polar coordinates of 6 radical 3,6 for r > 0. 3. Find the rectangular coordinates of (7, 30°). 4. Write the rectangular equation in polar form. (x – 4)2 + y2 = 16 5. Write the equation –2x + 6y = 7 in pola...

**Math ! Please Help !**

1.Graph the polar equation r=3-2sin(theta) 2. Find the polar coordinates of 6 radical 3,6 for r > 0. 3. Find the rectangular coordinates of (7, 30°). 4. Write the rectangular equation in polar form. (x – 4)2 + y2 = 16 5. Write the equation –2x + 6y = 7 in pol...

**Thermodynamics**

The initial state consists of a closed system containing one mole of super-heated liquid water at 115°C and 1 atmosphere pressure. The immediate surroundings are also at 115°C and 1 atmosphere pressure. The change in state is described as this one mole of super-heated ...

**Calculus please help !**

Find the inner product of a and b if a= (3, 0, –1) and b= (4, –2, 5), and state whether the vectors are perpendicular.

**Math ! Please Help !**

Find the inner product of a and b if a= (3, 0, –1) and b= (4, –2, 5), and state whether the vectors are perpendicular.

**Pre-calculus; urgent ! Please help !**

Find the inner product of a and b if a= (3, 0, –1) and b= (4, –2, 5), and state whether the vectors are perpendicular.

**Math**

1. A triangular prism has vertices at A(2, 0, 0), B(2, 1, 3), C(2, 2, 0), D(0, 0, 0), E(0, 1, 3), and F(0, 2, 0). Which image point has the coordinates (1, 4, 3) after a translation using the vector 1, 2, 3? 2. What point represents a reflection of B over the xy-plane? B'(...

**Calculus**

oh my goodness, that was so helpful! Thankyou :) i think i got them all!

**Calculus**

1. A triangular prism has vertices at A(2, 0, 0), B(2, 1, 3), C(2, 2, 0), D(0, 0, 0), E(0, 1, 3), and F(0, 2, 0). Which image point has the coordinates (1, 4, 3) after a translation using the vector 1, 2, 3? 2. What point represents a reflection of B over the xy-plane? B'(...

**Math**

1. A triangular prism has vertices at A(2, 0, 0), B(2, 1, 3), C(2, 2, 0), D(0, 0, 0), E(0, 1, 3), and F(0, 2, 0). Which image point has the coordinates (1, 4, 3) after a translation using the vector 1, 2, 3? 2. What point represents a reflection of B over the xy-plane? B'(...

**Pre-calculus**

1. A triangular prism has vertices at A(2, 0, 0), B(2, 1, 3), C(2, 2, 0), D(0, 0, 0), E(0, 1, 3), and F(0, 2, 0). Which image point has the coordinates (1, 4, 3) after a translation using the vector 1, 2, 3? 2. What point represents a reflection of B over the xy-plane? B'(...

**Pre-calculus**

Jana hit a golf ball with an initial velocity of 102 feet per second at an angle of 67° with the horizontal. After 2 seconds, how far has the ball traveled horizontally?

**Math**

What is 2.49 divided by 89?(BTW im not cheating im just having trouble checking my answers

**sience**

Scientists performed an experiment to determine whether there is a connection between learning ability and food. They took two groups of 20 mice each, all from the same purebred strain. The mice were deprived of food for 3 days and then given a standard learning session in ru...

**business**

describe how a manager would use the critical-incident appraisal method for assessing an employee?

**Algebra **

I need some help figuring these. Compute each product and simplify the result. I dont have the squareroot sign so put that meaning thats where it goes with the number after it. 1. (0.3 Squareroot of 5)^2 2. (2+ squareroot of 5)^2 3. (5+4Squareroot of 10)(1-2 squareroot of 10) ...

**Algebra **

Rationalize each expression by building perfect nth root factors for each denominator. Assume all variables represent positive quantities. I don’t understand how to compute these. Also I don’t have the square root sign so I typed it out where it would be and the numb...

**Algebra**

I need some help figuring these. Compute each product and simplify the result. I dont have the squareroot sign so put that meaning thats where it goes with the number after it. 1. (0.3 Squareroot of 5)^2 2. (2+ squareroot of 5)^2 3. (5+4Squareroot of 10)(1-2 squareroot of 10) ...

**english**

When I called the college, they said they were still accepting applications.

**Math, need help asap**

The ramp shown below is used to move crates of fruit to loading docks of different heights. When the horizontal distance AB is 12 meters, the height of the loading dock, BC, is 4 meters. What is the height of the loading dock DE? 12 m 8 m 9 m 15 m

**Statistics**

FALSE... Sorry Math Guru. Conditions for a regression analysis are We have n observations on an explanatory variable x and a response variable y. Our goal is to study or predict the behavior of y for given values of x. For any fixed value of x, the response varies according to...

**Physics**

A 69 kg swimmer free-falls off a 10.0 m diving platform. The diver comes to a stop 2.7 m below the water's surface. What is the magnitude of the force exerted by the water on the swimmer. (assume a positive direction is up) I calculated the force on the diver before they h...

**Physics**

A 69 kg swimmer free-falls off a 10.0 m diving platform. The diver comes to a stop 2.7 m below the water's surface. What is the magnitude of the force exerted by the water on the swimmer. (assume a positive direction is up) I calculated the force on the diver before they h...

**physics**

The maximum speed of a child on a swing is 4.90 m/s. The child's height above the ground is 0.525 m at the lowest point in his motion. How high above the ground is he at his highest point?

**7th grade health question**

1. eat nutrient dense food 2. a 3. b 4. d (pee goes through the urethra 5. a

**AP Environmental Science**

Consider the following heats, copper: 0.384J/g degrees, glass:0.502J/g degrees, water: 4.18J/g degrees, and lead:0.159J/g. Which substance once warmed, would be more likely to maintain its heat and keep you warm through a long party on a cold night?

**math**

how do u reduce 8 gal 9pt

**Biology**

some proteins (such as HBB) can vary quite a bit from species to species. others (ex., tubulin) vary little from species to species? Why?

**Physics**

Bob, Im not getting the same answer when i do plug in the H into finding the height of the apples and oranges

**Physics**

Wes and Lindsay stand on the roof of a building. Wes leans over the edge and drops an apple. Lindsay waits, 1.25s afrer Wes releases his fruit and throws an orange straight down at 28 m/s. Both pieces of fruit hit the ground simultaneously. Calculate the common height from whi...

**Scirnce/ math**

If a pinecone was thrown from a height of 45 meters and hit the ground 4.5 seconds later, how fast was the pinecone traveling

**Chemistry**

How do you figure out how mch oxygen gas escaped when Potassium Chlorate is decomposed in a reation? Also what mass of Potassium Chlorate was decomposed in the experiment? I conducted the experiement but don't know how to do this.

**algebra**

if 2k - 4 = 8, then k is what

**math**

Ben rolls a standard number cube (sides labeled with numbers 1 through 6). Find the probability that Ben rolls a number greater than 2 or an even number.

**Math**

okay so im doing homework and dont understand how to do it the question is -2 2/3+ d/6= 2/3 the little slash things are fraction things

**Calculus**

idk what tht is hehe

**Calculus**

idk what tht is hehe

**Geometry**

(1)Is a trapezoid a square? false (2) if all sides of a quadilateralare congruent,the quadilateral is a rhombis? true or false

**math**

Preform the operation and write in standard form: (8+20i)/(2i)

**APWH**

thesis: How did the World Wars of the 20th century demonstrate the application of “total war?”

**APWH**

thesis: How did the World Wars of the 20th century demonstrate the application of “total war?”

**chemistry**

I understand you are supposed to separate into half reactions and balance using H20 H+ and e- however, when i start doing that I get confused halfway through. this is as far as I have gotten: 4e- + 7H+ + Cr2O72- = 2Cr3+ +7H20 2Sn2+ = 2Sn4+ +4e- then cancel electrons...is this ...

**chemistry**

When the following reaction is balanced in acid solution, the coefficient of H+(aq) will be: Cr2O72-(aq) + Sn2+(aq) --> Cr3+(aq) + Sn4+(aq)

**algebra**

triangle 1 is 6,16,32 triangle 2 is 9,24 h they are similar how do i find h?

**koko**

how did you come up with 29? Need help bad please anyone

**Math help**

If a trend line had the equation: y=x+9 what y value would you expect to obtain when x is 20??

**math**

what are the odds in favor of randomly drawing the letter m from the letters in the word remember? would it be 2 out of 8 would you simplify it to 1 out of 4??? help

**Language Arts EnglishIII**

Identify the pronoun in the sentence below. Also identify the class and noun function of the pronoun using the abbreviations from the chart. For intensive pronouns, put NONE for noun function. Due to the large storm approaching, three students, Jamie, Lisa, and I, were allowed...

**Calculus**

integrate: (square root of (y^2 -121))/y dy, y>11. I got (12(square root of (y^2-121))/12 -sec^-1 (y/12) +C but it's not right. I'm not sure where I am going wrong.

**math**

sin^2x+sin^2tan^2x=tan^2x

**chemistry**

When 26 mL of a 120 mL stock solution containing 3.23 M CaF2 is diluted to 35 mL, how many moles of F- are in the new solution

**chemistry**

When 26 mL of a 120 mL stock solution containing 3.23 M CaF2 is diluted to 35 mL, how many moles of F- are in the new solution

**Chemistry/Engineering**

A 25 gram sample of CT is vaporized and used to fill a 5 L container. If the pressure in the container is 1.2 atm at 27 degrees Celsius, what is the molecular weight of CT in grams per mole? I used PV=nRT and found n=.2437 mol, but how do I got to grams per mole? CT is a made-...

**Chemistry**

At what temperature would 1.3 m NaCl freeze, given that the van't Hoff factor for NaCl is 1.9? Kf for water is 1.86 deg C/m.

**Chemistry**

At a certain temperature, the solubility of N_2 gas in water at 2.38 atm is 56.0 mg of N_2 gas/100 g of water. Calculate the solubility of N_2 gas in water, at the same temperature, if the partial pressure of N_2 gas over the solution is increased from 2.38 atm to 5.00 atm.

**Calculus**

Find the volume of the solid whose base is the region bounded by y=x^2 and the line y=0 and whose cross sections perpendicular to the base and parallel to the x-axis are semicircles.

**Calculus**

I use this to check my answers. I apologize for not realizing that I should have proven to you that I was doing them by myself at first.

**Calculus**

Find the volume of the solid formed when the region bounded by y=3x^2 and y=36-x^2 is revolved about the x-axis.

**Calculus**

Let R be the region bounded by y=x^2, x=1, and y=0. Use the shell method to find the volume of the solid generated when R is revolved about the line x=-11.

**Calculus**

Let R be the region bounded by y=x^2, x=1, and y=0. Use the shell method to find the volume of the solid generated when R is revolved about the line y=-2.

**Biology/Chemistry**

Consider that the human brain weighs about 1 kg and contains 10^11 cells. Assuming that each cell is entirely filled with water, and knowing that 1 cm^3 of water weighs 1 g, calculate the volume of a brain cell (in picoliters).

**Chemistry**

A sample of steam with a mass of 0.550 g and at a temperature of 100 degrees C condenses into an insulated container holding 4.40 g of water at 5.0 degrees C. Assuming that no heat is lost to the surroundings, what will be the final temperature of the mixture?

**quadratic equations**

Thank you Steve, your a life saver,and I appreciate your help!!!

**quadratic equations**

Suppose you are an event coordinator for a large performance theater. One of the hottest new Broadway musicals has started to tour and your city is the first stop on the tour. You need to supply information about projected ticket sales to the box office manager. The box office...

**Calculus**

Find the volume of the solid generated by revolving the following region about the given axis. The region in the first quadrant bounded by the curve y=x^2, below by the x-axis, and on the right by the line x=1, about the line x=-2