127,551 results, page 76

### physics

A 5.3-kg block is pushed 2.3 m up a vertical wall with constant speed by a constant force of magnitude F applied at an angle of θ = 30° with the horizontal, as shown in the figure below. If the coefficient of kinetic friction between block and wall is 0.30, determine the...

### Physics

PLEASE HELP! this is do tomorrow :( I have no clue how to do any of it. A plane is flying horizontally with speed 193 m/s at a height 2010 m above the ground, when a package is dropped from the plane.The acceleration of gravity is 9.8 m/s^2. 1.What is the horizontal distance ...

### chemistry

i have to write chemical formulas and balance them: nitrogen and oxyen---> nitrogen monoxide N2+02---->2NO nitrogen monoxide and oxygen----> nitrogen dioxide gas. NO2+O---->NO2 (i'm not sure about this, please check) nitrogen dioxide and water----> nitrous and ...

### physics - quantum mechanics

hi can you please help me with this particular question? thanks a lot ___________________________________ The work function of a material refers to the minimum energy required to remove an electron from the material. Assume that the work function of gold is 4.90eV and that of ...

### SAT Writing

Writeacher! Please correct, give feedback, and grade. Prompt: "I don't know the key to success,but the key to failure is to try to please everyone." Assignment: Is trying to please people a way to achieve success or a route to failure? Essay: " I don't know the key to successs...

Please help out. Thank you. A right triangle has one leg on the x-axis. The vertex at the right end of that leg is at the point (3,0). The other vertex touches the graph os y=e^x. the entire triangle is to lie in the first quadrant. Find the maximum area of this triangle....

If the side chain of a glutamic acid residue has a pKa of 4.1, at pH 6.1 the ratio of uncharged to charged side chain would be about A. 100:1 B. 10:1 C. 1:1 D. 1:10 E. 1:100 -i HAVE NO IDEA Which of the following amino acids has a side chain that can serve ONLY as a hydrogen ...

Fabio stands atop his 16 foot ladder when he realizes that the ladder is slipping down the side of the building. He decides that the base of the ladder is moving away from the bottom of the building at a rate of 2 feet per second when it is 3 feet from the bottom of the ...

### PHYSICS

Three moles of an ideal gas are compressed from 5.5*10^-2 to 2.5*10^-2 m^3. During the compression, 6.1*10^3J of work is done on the gas, and heat is removed to keep the temperature of the gas constant at all times. Find the temperature of the gas. I posted this question few ...

### physics

A war-wolf or trebuchet is a device used during the Middle Ages to throw rocks at castles and now sometimes used to fling large vegetables and pianos as a sport. A simple trebuchet is shown in the figure. Model it as a stiff rod of negligible mass, 3.05 m long, joining ...

### ENGLISH

Please read for any errors. And correct them. I really would appreciate it. We are considering updating our computer system. We have computer stations that are presently stand-along stations. We would like to discuss with you the cost of networking 25 new computers with your ...

### Chemistry

When sodium burns in air it produces a bright white light and heat energy 2Na + O2 2Na2O ?H = -414kJ/mol What would you expect to be the heat energy associated with the reverse process 2Na2O 2Na + O2 Can you please show the entire calculation with units please? This is what I ...

### Math - Inequalities

Please help with the following: What is an open dot, and what is a closed dot? Also, when are they used in inequalities? I am not really sure about what they are. The lesson has not taught me anything about open dots and closed dots. I have also looked them up, but I got ...

### Socials

How does education affect population growth? How does limiting birth rate affect population growth?? Please give me some good ideas, I already have some but I need more because I have to write an essay so please give me as many ideas as u can :) very much appreciated :) thanks:)

### physics

I have a diagram of a roller coaster. It starts at a height of 100m where the v=0, it then drops completely to the ground and then goes into a loop that is 75m high; the point where the loop starts is point A. From the loop, the track raises to e height of 50m (this is point B...

### physics

Last two problems on the homework! please help with these 2. it helps when detailed explanations are given! thanks A 2 kg ball is thrown horizontally, at 5m/s, from a height of 5 m. How fast will it be moving when it contacts the ground? A 70 kg pole-vaulter converts the ...

how can you tell which form of a rational number is most appropriate in a given situation? Use an integer, or fraction, NEVER a decimal number. If your number is say 3.5, then the rational answer would be 35/100. if the number is .75, then the rational answer would be 75/100 ...

Petr has a cylindrical block of wood od diameter 6 cm and height 18 cm. He glues the base to a board, but wants to paint the rest of the block. He wants to paint the bottom half of the wood black and the top half white. a) Calculate the surface area of the block that Peter ...

### English

Please check: 1. If a river is represents your thoughts is that an analogy or conventional symbol. I think it is an "analogy" but if it is a conventional symbol please explain why. 2.If in a story. in a brief intro, we learn about two friends and it sets us up for the rest of ...

### General

This is a question to everybody: I was just wondering if anyone had any science related questions or things they wonder about that may require experiments. If you have any ideas please mention them. I need this for a science for a science fair project and have at most a 6 ...

### Complex Algaebra, Plz Help!!

Good evening to all around the world. Need help with this question, however i must show my answers supported by the working out. Please help. This question is difficult, the one who solves it for me is my hero!!!! Q11) Two functions f and g are defined by F:x (arrow) 25/(3x-2...

Not sure which answers to use.. please help: choose from these words: deficit, dissent,lucrative and agnostic.. 1& 2: My uncle decided to splurge and _____ with a country club because golf is his favorite_________.(Dissent & lucrative) 3 & 4 : Because my father_______s to make...

### physics

Physics force of friction question a 63kg water skier is pulled across a lake by a rope that exerts a force of 3.2x10^2 and makes an angle 17 degrees above the horizontal. if the coefficient between the skies and the lake is 0.27 at what rate will the skier accelerate?

### PHYSICS

Hi! I have some questions from a study guide in my physics class, and they give me the answer, but I have to show how to get the answer. I did most of them, but need help with these. Here is problem #2: Suppose the spring in a pinball machine has a spring contant of k=400 N/m...

### Physics

what is the physics theories behind putting 500 rubber bands on a watermelon until it explodes? I know there would be at least 2. The compression of rubber bands and Water not being able to compress. I need help with more explanation. what are the name of the law's behind this...

### History

Can someone please describe the legacy of Imperialism in India. For me Please check these sites for the effects of imperialism on India. (Broken Link Removed) http://wiki.answers.com/Q/What_were_the_negative_and_positive_effects_of_imperialism_on_India

Using the numbers 5, 8, and 24, create a problem using no more than four operations (addition, subtraction, multiplication, division, square, square root, cube, cube root) where the solution will be an irrational number. Explain why the result of your operations is an ...

### physics

please check my answers. 20. does the international space station have gravitational pe? ke? explain? -It has gravitation pe. I thought that Gravitational potential energy is the energy stored in an object as the result of its vertical position or height? 30.a moving hammer ...

### physics

A 10 g particle has the potential energy shown in a graph with the y-axis label U(J) and the x axis is labeled in cm. There is a diagonal line from 4 J down to 1 cm and the line levels out on the x axis to 3 cm and rises again to a height of 2 J at 5 cm and levels out to 7 cm ...

5. A 1,600 kg car is moving south at 24 m/s. What is its momentum? (Points : 1) 66 kgm/s south 66 kgm/s north 38,000 kgm/s north 38,000 kgm/s south Question 6. 6. The velocity of a 150 kg cart changes from 6.0 m/s to 14.0 m/s. What is the magnitude of the impulse that acted on...

The equation below shows the area of a trapezoid, A, with a height of 9 cm, and one base 35 cm. A = 9 over 2(b + 35) Which of the following formulas correctly solves for the other base, b? b = 2A over 9 + 35 b = 2 multiplied by A over 9 − 35 b = 2 multiplied by A plus 35...

Make a graph using the measured quantities with radial distance on the x-axis and tangential velocity on the y-axis. Radial distance= 1.85, 1.40, 1.00, 0.80, 0.60, 0.40 Tangential velocity= 1.03, 1.36, 1.91, 2.38, 3.18, 4.79 1) using your knowledge of graphs, describe the ...

### Physics

please check these: In which of the following sentences is WORK used in the scientific sense of the word? a. holding a heavy box requires a lot of work b. a scientist works on an experiment in the laboratory c. sam and rachel pushed hard, but they could do no work on the car d...

Please help me with the following question: Which statement describes the relationship between being a waitress and being a restaurant manager? A. Being a waitress is a job, while managing a restaurant is a career. B. Being a waitress and managing a restaurant can be different...

### i need help asap! please. :)

ok, can somebody explain how to do this? simplify by adding like terms. write the answer with all variables in the numerator. x^2y 4x^2p^3 2xp 5y ---- - ------- - ------- - ----- p^-3 y^-1 y^-1p^2 p^-3x^-2 PLEASE HELP ME!!!! i'm homeschooled so i cant continue w/ the rest of ...

### quote- english discussion

Can somebody please help me out with related texts or anything related to the battle of the sexes. Like movies, books, articles, music etc. -How women were treated and male dominance. - What women's roles were and why. - Why women weren't allowed in business. Um, basically ...

### Science math

Can no one help me? I posted a question earlier I don't need answer I need to understand what I did wrong my thinking is that if I have a 2:1 ratio And my total is 99 that if I divide by 3 then I can get the amounts 33x2 is 66, then 33x1 is 33 so it would be 66:33. I used this...

### Language Arts

Write a short essay in which you examine the figurative language in “Concrete Mixers.” Explain what the concrete mixers are compared to, what the parts of the mixers are compared to, and what the drivers of the mixers are compared to. Then, show how the comparisons are ...

### chemistry

Can you please check if I came up with the right answer for this please. A 4.30L container had 55.10 moles of N2O4 added to it. When equilibrium was established the concentration of N2O4 was found to be 1.69M.What is the Kc for the following reaction? N2O4(g)<-->2NO2(g) ...

### Science

I REALLY REALLY NEED HELP SO 1.I need to do an essay asking you (me)to explain what is the difference between erosion,transport,and deposition?... 2.another essay asking me to explain you (me) to explain the destructive and positive effects of a volcanic erupyion?... 3.a short...

### GMAT Algebra (NO CALC)

It's been a few years since I've done algebra, and many more since we've been expected to do it without a calculator like the GMAT rules state. Please help me figure out these two problems without the use of a calculator. 1. __________________ √(16)(20) + (8)(32) = The ...

Using the numbers 5, 8, and 24, create a problem using no more than four operations (addition, subtraction, multiplication, division, square, square root, cube, cube root) where the solution will be an irrational number. Explain why the result of your operations is an ...

### Math

Check my answers please. 1)Which statement is an example of the Identity Property of Multiplication? a)8 • 0 = 0 b)8 • 1 = 8<<<< c)8 • –1 = –8 d)–8 • –1 = 8 2)Whats another way to write -3*(4+7)? a)-3*4+7<<<<< b)-3*4*7 c)-3*4+4*7 d)-3...

### physics

A 17.0 kg child travels down a playground slide 3.50 m high and reaches the bottom with a speed of 2.50 m/s. How much heat was generated due to friction as a result of this process? my teacher hadn't taught anything about heat..but he did give us this question, thus, i got no ...

### Physics

A park ranger wants to shoot a monkey hanging from a branch of a tree with a tranquilizing dart. The ranger aims directly at the monkey, not realizing that the dart will follow a parabolic path and thus will fall below the monkey. The monkey, however, sees the dart leave the ...

### language

My teacher said that my narrative poem has no rhythm and sound. can you please help me fix it? PLEASE PLEASE PLEASE!! The Best Of Friends John and Fred are the closest friends They hang all day everyday They do homework together They don’t ever fight. A girl named Isabel is ...

The overall length of a piccolo is 30.6 cm. The resonating air column vibrates as in a pipe that is open at both ends. Assume the speed of sound is 343 m/s. (a) Find the frequency of the lowest note a piccolo can play, assuming the speed of sound in air is 343 m/s. (b) Opening...

The overall length of a piccolo is 30.6 cm. The resonating air column vibrates as in a pipe that is open at both ends. Assume the speed of sound is 343 m/s. (a) Find the frequency of the lowest note a piccolo can play, assuming the speed of sound in air is 343 m/s. (b) Opening...

The overall length of a piccolo is 30.6 cm. The resonating air column vibrates as in a pipe that is open at both ends. Assume the speed of sound is 343 m/s. (a) Find the frequency of the lowest note a piccolo can play, assuming the speed of sound in air is 343 m/s. (b) Opening...

The overall length of a piccolo is 30.6 cm. The resonating air column vibrates as in a pipe that is open at both ends. Assume the speed of sound is 343 m/s. (a) Find the frequency of the lowest note a piccolo can play, assuming the speed of sound in air is 343 m/s. (b) Opening...

### physics multiple choice

1)A coil of length 1cm has N turns and carries an electric current I. It creates at a point M a magnetic field of intensity B. -If a current 3I is sent in the coil the field strength at M becomes: a. 3B b. B/3 c. B -If the number of turns per unit length is doubled the field ...

Describe the vertical asymptote and hole for the graph of (x^2+x-6)/(x^2-9). a. asymptote: x=2; hole: x=-3 b. asymptote: x=3; hole: x=2 c. asymptote: x=-3; hole: x=3 d. asymptote: x=3; hole: x=-3 I know that it has to either be b or d because the asymptote is x=3. Can someone ...

### physics

a physics book is thrown horizontal at a velocity of 10.0m/s from the top of a cliff 78.4 m high. a). how long does the stone take to reach the bottom of the cliff? b.) how far from the base of the base of the cliff does the stone stike the ground?

### Physics

A student places her 442 g physics book on a frictionless table. She pushes the book against a spring, compressing the spring by 4.44 cm, then releases the book. What is the book's speed as it slides away? The spring constant is 1102 N/m.

### physics

Consider the bending of light by the gravitation of the Sun as described by Newtonian physics. Light of frequency f passes at a distance d from the center of the Sun, which has a mass M. Show that the bending angle of the light is proportional to M/d.

### AP Physics B

Were do I find AP Physics B Mulitiple Choice Questions. I know that they are free on the internet somewere I can not seem to find them. I also can not find free response questions older than 1999 on the college bord website h t t p : / / a p c e n t r a l . c o l l e g e b o a...

### Physics

Two cars approach along icy streets which meet at a right angle to one another. The cars collide and stick together. One car has a mass of 1200 kg and had a speed of 30 km/h in the +x direction before the collision. The second car has a mass of 1500 kg and was traveling in the...

### physics

The depth of the ocean is sometimes measured in fathoms (1 fathom = 6 feet). Distance on the surface of the ocean is sometimes measured in nautical miles (1 nautical mile = 6076 feet). The water beneath a surface rectangle 3.70 nautical miles by 2.80 nautical miles has a depth...

### DrBob222 physics

A skier is pulled up a slope at a constant velocity by a tow bar. The slope is inclined at 27.2 ° with respect to the horizontal. The force applied to the skier by the tow bar is parallel to the slope. The skier's mass is 53.7 kg, and the coefficient of kinetic friction ...

A 8000-kg freight car rolls along rails with negligible friction. The car is brought to rest by a combination of two coiled springs as illustrated in the figure below. Both springs are described by Hooke's law and have spring constants with k1 = 1700 N/m and k2 = 3700 N/m. ...

### Intro. to Comp.

Would you please go to page 2 and look under "intro. to comp." and check the questions and my answers? Please let me know what I have wrong. Thanks, Shannon you may have to go to page 3, drwls checked them, but I have doubts about his work. This? http://www.jiskha.com/display....

### Physics-Ohms Law

Will you check my answers please? A volt is a unit of current and an amprere is a unit of current. It is common to call electric potential difference- voltage A current of 1 ampere is a flow of charge at the rate of 1 coulomb per second. When a charge of 15 C flows through any...

### Physics

Ok work... work = net force parallel to displacement lets say something was pushed up a ramp at a constant velocity and you were asked how much work was done by pushing the block well the forces parellel to the displacement is the x component of gravity friction opposing ...

Hello, can someone please help us solve. Very confused by this one. Carlos made trail mix using 2 cups peanuts, 1 1/2 cups M&M's 1 1/4 cups pretzels and 1 1/14 cup raisins. How many cups of trail mix will this recip. make. and if he divides it evenly into 12 bags, how many ...

### PHYSICS

A ball on a string moves in a vertical circle. When the ball is at its lowest point, the tension in the string is equal to the ball's weight. (i said true..?) A small projectile is launched horizontally 1 m above the surface of a smooth, airless planet, with sufficient speed ...

### Physics

Sam pushes crates starting form rest across the floor of his classroom for 3 s with a net force as shown above. For each crate, rank the following from greatest to least: A 100N/30kg, B 75N/20kg C 50N/10kg 1. Impulse delivered 2. Change in momentum 3. Final speed 4. Momentum ...

### 5th math

I need help with my math .What is the least Common Multiple (LCM) for 6,4,and 8.? please! show how you get the answer. cause, i got( 2,2,2) i'm not sure of myself at all. thank you! another one problem i'm really confuse is the Write a 9- digit numeral with 3 in the hundredths...

### Physics

A physics student wants to build a spring gun that when aimed horizontally will give a 15.0- g ball an initial acceleration of 'g' by releasing a spring that has been compressed 15.0 cm. The spring constant is .981. What is the velocity of the ball as it emerges from the gun?

### Physics

A 543-N physics student stands on a bathroom scale in an 805-kg (including the student) elevator that is supported by a cable. As the elevator starts moving, the scale reads 473 N A) Find the magnitude of the acceleration of the elevator.

### Physics

A physics professor demonstrates the Doppler effect by tying a 600 Hz sound generator to a 1.0-m-long rope and whirling it around her head in a horizontal circle at 100 rpm. What are the highest and lowest frequencies heard by a student in the classroom? (Hint. Find the speed ...

### Pre Calculus

As x increases from p/4 to 3p/2, the value of sin(x) : A.increases throughout the interval B.decreases at first, then increases C.increases at first, then decreases D.decreases throughout the interval E.none of the above please explain why the answer is as it is, I don't ...

1. Explain how the small intestine is specialized for digestion and absorption. The small intestine is specialized for absorption by the huge number of villi that line the intestinal wall. Villi have cells that produce intestinal enzymes which complete the digestion of ...

Can you please give a example so that I can understand it better. 1)How can you tell whether a polynomial is written in factor form. 2)Construct a trinomial whose greatest common factor is 2x^2. 3)Describe the different methods that can be used to find the product: (2x-5)(3x+1...

### ENGLISH SOS!!!!!!!!! MS SUE, SOMEONE, PLEASE!

IS The italicized word in the sentence below an adverb or a preposition? Why don't you come OVER this evening? A. Adverb. B. Preposition. C. None of the above. Which sentence below uses the word FINE as an interjection? A. The weather is very FINE today. B. Did you pay your ...

### Social Studies

So I am trying to write two articles and am NOT asking you to write them for me, just for help so I can write them. It's about the French and Indian war. I know that they were fighting and why, but what caused both of them to get into the war? Like I need to write two articles...

### Physics

1. If the change in position delta(x) is related to velocity v (w/ units of m/s) in the equation delta(x)=Av, the constant A has which dimension? a. m/s^2 b. m c. s d. m^2 2. If a is acceleration (m/s^2), delta(v) is change in velocity (m/s), delta(x) is change in position (m...

Three people are trying to hold a lion still for the vet. The lion, in the center, is wearing a collar with three ropes attached to it and each person has a hold of the rope. charlie is pulling in the direction of 62 degrees west of north with a force of 175 newtons. Sam is ...

A planet A of mass m is in a circular orbit of radius "a" around a star ( M_star >> m ). Another planet B with the same mass m is in an elliptical orbit around the same star with its length of the semi-major axis equal to "a" . We have just learned that, in this case, ...

A critical angle of 24.4 degrees applies to: a) light travelling from air into diamond b) light travelling from diamond into air c) light travelling from water into diamond d) light travelling from diamond into water Would the answer be a)?

### physics

A meterstick is at rest in an inertial frame S2.If S2 moves with a speed of 0.8 c with respect to a rest frame S1, find the length of the meterstick as measured in frame S1 according to classical physics. Answer in units of m.

### Coding 1

Differentiate between the offical coding guidelines for using V codes in an inpatient and out patient seeting? My answer: Can you please read my answer and tell me what you think? Please. V codes are so nonspececific, or potentially redundant with other codes in the ...

Kevin needs to convert 620 millimeters per minute to meters per hour. Which conversion factors should he use? A. 0.001m/1mm and 1h/60min B. 0.001m/1mm and 60min/1h C. 1mm/0.001m and 1h/60min D. 1mm/0.001m and 60min/1h PLEASE HELP!!!!

### intro to physics

I was wondering if you guys can help me with this question An airplance is traveling 835 km/h in a direction 41.5 degrees west of north. part a) find the component of the velocity in the northerly direction part b) find the same but in the westerly direction part c) how far ...

### French

So i have to answer questions from my french textbook called on y va! 1 and on page 34 theres this article about microbes and 3 called rhinovirus,lacotobacillus and bacillus cereus Heres the questions ________________________________________ Quel miscrobe est-ce qu'on associe...

3. You travel from New Orleans, Louisiana, with the following vectors: • New Orleans à Point A: q = 180°, Δd = 483 km • Point A à Point B: q = 106°, Δd = 347 km • Point B à Point C: q = 106°, Δd = 347 km Remember: east = 0°, north = 90°, west = 180...

A point charge of charge 1 mC and mass 100 g is attached to a non-conducting massless rod of length 10 cm. The other end of the rod is attached to a two-dimensional sheet with uniform charge density σ and the rod is free to rotate. The sheet is parallel to the y-z plane (...

In a physics laboratory experiment, a 6.00 kg box is pushed across a flat table by a horizontal force F. A. If the box is moving at a constant speed of 0.35 m/s and the coefficient of friction is 0.12. What is the magnitude of F? B. What is the magnitude of F if the box is ...

1) What phase are daughter cells in as a result of mitosis? answer: Anaphase 2)During what phase of mitosis do centromeres divide and the chromosomes move toward of their respective poles? answer: prophase 3)Which phase of mitosis is the last phase that chromatids are together...

### IT

Can someone check this for me please.. 18 MB of data are to be transmitted over a a megabyte per second connection. How long should the complete transaction take, to the nearest 0.1s. Size of file / data rate so, 18,874,368 bytes / 4,000,000 = 4.718592 = 4.7 is that correct a ...

### pre calculus

2. Graph the following function using transformations. Be sure to graph all of the stages on one graph. State the domain and range. y= -2 lxl +2 For example, if you were asked to graph y= x^2 + 1 using transformations, you would show the graph of y= x^2 and the graph shifted ...

1) What conclusion can you draw about the comparative advantages other countries have in farming over Japan and the Koreas? 2) What conclusion can you draw about the government's influence on daily life in North Korea? Explain your reasoning. My answer: North Korea has an ...

### Calc

I'm trying to write an equation for all the infinite values of the equation -i ln(2 + sqrt(3) ) people have told me that its pi(2n + 1) -i ln(2 + sqrt(3) ) I don't see how so I plug in numbers for n and don't get the same answer usign my calculator please explain what I plug ...

### Chemistry - DrBob222

When sodium burns in air it produces a bright white light and heat energy 2Na + O2 2Na2O ?H = -414kJ/mol What would you expect to be the heat energy associated with the reverse process 2Na2O 2Na + O2 Can you please show the entire calculation with units please? This is what I ...

At time t=0, an astronaut stands on a platform 3 meters above the moon's surface and throws a rock directly upward with an initial velocity of 32 m/sec. if the acceleration due to gravity is 1.6 m/sec^2. a) find the equations of motion for the throwing of this rock. b) how ...

A bottle contains 0.5 quart of grape juice. Keisha will use 0.2 of the grape juice to makie fruit punch. How much grape juice sill Keisha use for the fruit? I chose a.)0.3. My mom says it is b.) 0.2 The teacher's edition says it is c.) 0.1. Can you please explain how to work ...

### Physics

This is the info for the problem: A block of mass M1 = 160.0 kg sits on an inclined plane and is connected to a bucket with a massless string over a massless and frictionless pulley. The coefficient of static friction between the block and the plane is ms = 0.52, and the angle...

### Physics

A typical brick has dimensions of 20.0 cm by 10.0 cm by 5.0 cm and weighs 20.0 N. How does the pressure exerted by a typical brick when it is resting on its smallest side compare to the pressure exerted when it is resting on its largest side PLEASE HELP !! thanks! surface area...

### physics

Posted by sandhu on Tuesday, November 30, 2010 at 7:38pm. Posted by sandhu on Tuesday, November 30, 2010 at 1:17am. A T is made of two identical 740 g thin solid rods. The moment of inertia of the T about an axis perpendicular to the screen through point at one end of a rod is...