# last physics problem!

92,159 results

### statistics

34. Two students (say A, and B) are challenged to solve a problem in statistics. Suppose that the probability that A will solve the problem is 40%, the probability that B will solve the problem is 55%, and the probability that A or B will solve the problem is 25%. The ...

### Algebra

Use the above graph of f(x) to complete the following table for values of its inverse function, f^{-1}(x). The graph has a point on (2,2)the y-intercept is 4 the x intercept is 3 x =-4, 8, 0, -2, 2 f^{-1}(x) Note: You can earn partial credit on this problem...

### PHYSICS

Identify/name at least 1 biological science problem and prepare on how procedure on how to solve such problem then recommend solutions.

### Physics

Write a projectile motion problem with the initial condition vi=15 m/s at 50° above the horizontal. Solve this problem for ∆x, max height, and time of flight.

### Algebra

How do I work this problem, it is not a homework problem but a problem similar to a homework problem. I know i need to factor the left side of the problem. here is what I have so far.. x^2-2x+1=7 x^2-2x+1-7=7-7 x^2-2x-6=0 here is where I run into an issue, I can not seem to ...

### Algenra

How do I work this problem, it is not a homework problem but a problem similar to a homework problem. I know i need to factor the left side of the problem. here is what I have so far.. x^2-2x+1=7 x^2-2x+1-7=7-7 x^2-2x-6=0 here is where I run into an issue, I can not seem to ...

### English

1. The hospital is for certain people. 2. He has a certain problem. 3. He has a sure problem. 4. He is certain that the boy is diligent. -------------------------- Are they all grammatical? The meaning of 'certain' seems to be different. Does #2 mean #3? Is the meaning of '...

### English

1. It's your problem, not my problem. 2. It's your problem, and it's not my problem. 3. It's your problem, but it's not my problem. (What does #1 mean? Does #1 mean #2 or #3? Or do you have another expression which is the full form of #1?) 4. I think the girl (to be) her. 5. I...

### Physics

Please help!!! Physics test!? I have a physics test tomorrow on projectile motion, and I don't feel ready for it. I'm having trouble in the class and I need to ace this test. The problem is I get confused when I get a problem. I don't know how to proceed. After I read the ...

### Physics

I was given a problem that has a triangle shape, which two sides should represent strings. The axial area that is rotating has an angle of 40 degrees. And it rotates by w (omega) = 1 Rad/Sec. I have to find tension of both the strings. How would I exactly start the problem? I ...

### math

What strategy did you use in solving this problem? 22. Suppose that you wanted to find the whole numbers represented by each of the letters in the following addition problem: Which problem-solving strategy might be most helpful to you in solving this problem? (You need not ...

### college physics

how can i find heat capacity of silver without there being a temperature in the problem the problem only lists the mass of the silver

### dr wls - physics freak design problem

wls, If you get a chance could you look at the "a bit challenging" problem down a little from here. I am not sure my idea is the best.

### Management Accounting

well i try to solve this problem but it look so complicated I need to cash buget what's the problem? check the problem i don't get it check the problem i don't get it

### Physics - HELP! PLEASE

The problem is from fundamentals of physics 9th edition by halliday. Here is a free download of the book since I couldn't post the graph (I had to write out link since site doesn't allow links to be posted): tripplew period sendspace period com/file/shrz0x I am having trouble ...

### trig

I'm trying to see if the teacher didn't give us the right problem or if I'm just not getting it. The problem is "re-write the expression without a fraction: 4/(1-sin x)". I can do it if the problem is sin squared x but I don't know how to solve the problem given. Pls help. thx

### PHYSICS'S

How much heat would it take to change 1.0kg of water at 20°C to steam at 110°C. I can't get the right answer that is 2.6×10^6J. Please tell me how can I solve this problem, I want to learn how to solve These problem plz help me.

### physics

PLEASE HELP!! I HAVE A TEST TOMORROW!! i just posted this problem but a very important drawing was left out! if Q=30 uC, q=5.0 uC, and d=30cm, what is the magnitude of the electrostatic force on q in N? (Ke= 8.99 x 10^9 Nm^2/C^2) (uC= micro coulombs) (u= 10^-6) d 2d O<---&...

### Physics

The 56 kg man in the roller coaster car is sitting on a bathroom scale. If he is traveling at 40.9 m/s at the point shown and the radius of the vertical coaster track is 87 meters, to the nearest newton what does the scale read? What is the answer to the previous problem if ...

### Calculus

Given two problems: Problem A: Tau = Integral(0 to v) v/(q^2 - v^2) dv q = constant Problem B: Tau = Integral(V TO 0) v/(q^2 - v^2) dv q = constant Why is it that, SUBSTITUTION RULE is used in problem A, and QUOTIENT RULE is used in problem B? The two problems are somewhat ...

### Physics

In 1989, Carl Lewis established a world record when he ran the 100 meter dash in 9.92 seconds. What was his average speed(in m/s) for the race? Remember to include your data, equation, and work when solving this problem. I am not sure how to do this problem. Please help!!

### Physics

What is the value of each of the angles of a triangle whose sides are 95, 150, 190 cm in length? I have tried to do this problem, don't get me wrong, but I don't really know where to go. Can someone tell me how to even approach this problem? The textbook states that the ...

### Physics

I believe this is a projectile motion problem with the angle = 0 degrees. A ball is thrown horizontally from the roof of a building 7.5 m tall and lands 9.5 m from the base. What was the ball's initial speed? How would I start off this problem? Or set it up throughout?

### Physics

A copper wire with a length 2.0m, cross sectional area 7.1x10^-6 m^2 and young's modulus 11x10^10 N/m^2 has a 200kg load hung on it. What is its increase the length? (g=9.8 m/s^2) im not sure how to start this problem or what equation to use, can some one help me out with this...

### Math

Young and Company owes bond holders $5,500 interest at the end of each quarter for the next five years. How much must they deposit now at 8% interest compounded quarterly to yield an annuity payment of $5,500? -- I am pretty sure I know how to do the problem but I am just ...

### Physics...Help please

The problem is from fundamentals of physics 9th edition by halliday. Here is a free download of the book since I couldn't post the graph (I had to write out link since site doesn't allow links to be posted): tripplew period sendspace period com/file/shrz0x I am having trouble ...

### julie&shawn, math

The problem was actually 3 1/3 - 1 1/2= 10/3-3/2= 20/6-9/6=11/6, or 1 5/6 How did you get 1 and 5/6 from the problem: 3 and 1/3 minus 1 and 2/3 3 1/3 = 2 4/3 - 1 2/3 _____________________ 1 2/3 1 2/3 is the answer. Did you maybe copy the problem wrong?

### Math

Could you help me with this problem? -2 5 Sorry couldn't type the problem correctly. The problem is 5 to the negative 2. I got 0.04 is the answer. Is this correct. Thank you.

### Critical Thinking

What are the characteristics of a problem and how might a problem present itself? Also, how should a problem be investigated and identified?

### Physics

A baseball is his so that a travel straight upward after being struck by the bat. A fat observes that it takes three seconds for the ball to reach its maximum height. Find the balls initial velocity and the height it reaches. my professor showed a similar problem to this but I...

### physics

Thank you Henry for helping me with my physics problem about the angle etc and the golf ball on 7/28.

### Maths

I got 30% on a 10-problem test, 70% on a 20-problem test and 80% on a 30-problem test. If the three tests are combined in one 60-problem test what percentage is my overall score?

### Math

Went ahead and did the HW the teach recommended but she did not post the answers and I would like to see if im on the right track. Problem 1: Are the vectors (2,−1,−3), (3, 0,−2), (1, 1,−4) linearly independent? Problem 2 : Is the set {x E R^4 : (x1 &#...

### Physics

Hi again, Can anyone help me with the physics problem I posted earlier today (Sunday) at 3:47 p.m. I would really appreciate it!!Thanks!

### Physics

I have a physics problem and it's below.

### algebra

i have a homework problem that i don't know how to do it the question to the problem says: Find the value of expression.identify the property used in each step and the problem is:7(10-1x3)

### physics

A round ball bounces to 2m after being dropped from an undetermined height. To what height will it bounce if dropped from a height 2.5 times as high? (how do u even calculate this problem?). (or is it just a problem that cant be solved?)

### Ms. Sue PLZ HELP!!!(Civics)

3. Which of the following statements best describes a foreign policy issue? A problem that affects every citizen on a single continent A problem that cannot be contained within a country’s borders *** A problem shared among people living in the same country A problem related...

### Chemistry

Classify the following type of stoichiometry problem: How many grams of zinc must react with an excess volume of hydrochloric acid to yield 0.500 g of zinc chloride? mass-mass problem mass-volume problem volume-volume problem mole-mole problem none of the above

### Algebra

My second question is in section 5.4, problem 39. x+4/x-2 < or = 1; Since the inequality in not , should the answer to this problem in the back of the book be: {x|x< or = 2}, or in interval notation: (-infinity, 2)? Please explain this problem. Thanks.

### Algebra- Middle

My math question ask is 1/3(x-9) = 2x+7 greater than or less than 4/3(x+4)= -4x. The problem (1) answer = 6. Problem (2) answer = -1. Therefore problem (2) is less than problem (1). Are the answer to the equations correct. Sincerely

### Algebra 2

The problem is 3x^2 - 26 + 35 (We have to factor it!) So, I did the problem, but I'm not sure how to write the final answer. This is what my problem looks like so far: 3x^2 - 26 + 35 (3x^2-21x)-(5x+35) 3x(x-7)-5(x+7) and this is where I have the problem. I know I need to put (...

### beginning chemistry

The problem says indicate the the number of sig. figs. that should be present in the answers to the following problem without solving the problem. 0.70 x 7.00 x 6.880= What is a sig.fig. and how can you find them without solving the problem? It doesn't make sense

### English

1. To come up with possible solutions to a problem is referred to as: A. decision making. B. concept mapping. C. critical thinking. D. problem solving. is it D 2. "Should I apply for a job or go for an internship?" is an example of which stage in the problem-solving process? A...

### physics

solve this physics problem for me a vehicle has a mass of 1200kg and four wheels of area 0.06m2 calculate pressure on one wheel

### Algebra Question

I did a problem and used the substitution method and it took me forever to solve by hand. Is there a shorter way to show how this problem was done. The problem was x+y+z=7,x-y+2z=7,2x+y+3z=15 The final answer came out to be x=4 z=2 y=1

### algebra 1

Can someone please help me with this inequality problem -3-8>(4x+8)-8 I have no idea how to solve this problem but I would like to learn. Can you be kind to show me the steps so that I can use this as an example problem for other problems. Thanks!

### Trig

Find an equation for the hyperbola described. Foci at (-4,0) and (4,0); asymptote the line y= -x. Please explain the steps of this problem. My book does not get an example of this type of problem and I'm not having any luck working this problem.

### MATH

in a contest, Bello. Adamu, and Lawi are asked to solve a mathematical problem. the probability that they solve the problem correctly are 1/5, 2/3, and 2/5. find the probability that:(1)None of them solve the problem correctly(2)At least one of them solve the problem correctly...

### English

1. He can not solve the math problem. 2. He cannot solve the math problem. 3. He can't solve the math problem. 4. He could not solve the math problem. 5. He couldnot solve the math problem. 6. He couldn't solve the math problem. (Are they all grammatical? What about #5? Is it ...

### math,correction

Can someone correct these for me plz... Problem#6 Factor. x(x-5)-2(x-5) My answer is: (x-2)(x-5) Problem#7 Factor completely. x^2-x-6 My answer is: (x+2)(x-3) Problem#8 Factor completely. 35x^2+40x+5 My answer is: (7x+1)(5x+5) Problem #9 Factor by grouping. x^3-5x^2+2x-10 MY ...

### chemistry

I have been having a problem with solving a chemistry problem. The problem requires finding the density in copper at 1305K (the temperature changes when you reset the problem). I think I am using the proper formula, (N_v/N_s=Ae^-changeH_v/kT). My results are a very large ...

### chemistry

I have been having a problem with solving a chemistry problem. The problem requires finding the density in copper at 1305K (the temperature changes when you reset the problem). I think I am using the proper formula, (N_v/N_s=Ae^-changeH_v/kT). My results are a very large ...

### physics

sorry! trying to get the drawing correct! PLEASE HELP!! I HAVE A TEST TOMORROW!! i just posted this problem but a very important drawing was left out! if Q=30 uC, q=5.0 uC, and d=30cm, what is the magnitude of the electrostatic force on q in N? (Ke= 8.99 x 10^9 Nm^2/C^2) (uC= ...

### Physics

When you see a traffic light turn red, you apply the brakes until you come to a stop. Suppose your initial speed was 12.9 m/s, and you come to rest in 35.0 m. How much time does this take? Assume constant deceleration. What equation do I use to solve this problem? You can show...

### [Physics] super hard/long circuit problem

I have this last one which is really long/hard. It's so long that I just decided to scan the whole problem. So here it is... and thanks everyone for the help so far! h t t p ://img201.imageshack.us/my.php?image=circuit5ij7.png *remember to delete spaces or it won't load!

### physics

Can someone please help me? I am having a really hard time with physics. This is not a test question. It is a practice problem from a review website I am supposed to use, but I am having a really hard time. Can someone at least help me to begin setting up the problem? I would ...

### Problem solving:for 3rd grade

Write a real-world problem that you can solve by adding or subtracting.Then give your problem to a classmate to solve.

### Physics Classical Mechanics

Greco I am having a problem with the turntable (gyroscope) problem. The angular speed is 300 radians per second. I tried a couple of formulas including one by you. Maybe I am not converting the units properly. I could use some help. I tried several attempts all were wrong. I ...

### math...help please!

ok i REALLY am stumped. please help! it is a sequence problem here is the problem.... 120,60,30 __, __, __. if you could give me the rule for this problem and the next 3 numbers that would be so great!!!!!!

### physics

In the problem, please assume the free-fall acceleration g = 9.80 m/s2 unless a more precise value is given in the problem statement. Ignore air resistance. A stone is thrown vertically downward from the roof of a building. It passes a window 15.0 m below the roof with a speed...

### algebra

Could you please check my answer to this problem: Simplify the expression Original problem: (3x^2+10x-8)/(3x^2-17x+10) x (2x^2 + 9x -5)/(x^2 + 3x-4) The answer I got was: (3x +4)(x-2)/ (3x-2)(x-5) x (2x-1) ( x +5)/ (x +4) (x-1) so basically the problem could not be simplified ...

### Math

which value is the "whole" in the following problem: 14 is what percent of 56? I said the "whole" is 56, due to the problem not stating whether i was to solve the problem by using proportions or whatever. May you check my answer? Thank You

### Physics

I have a hw problem that I know involves calculus, but I'm stumped. The number density of photons left over from the Big Bang has an energy dependence of the form n(E)=(E^2)/e^(E/T)−1, where E is the energy of the photon and T is the temperature of this relic radiation...

### Probablity

Samir had prepared the problem tests for Stages 1 to 5 of Geometry and Combinatorics for next week but forgot to label which test was for which stage. Since Samir didn't label them, the computer assigned them labels 1 through 5 randomly, with each label appearing only once. ...

### Physics

Hello! A falling piano reaches a velocity of 120 km/h. Find the kinetic energy if the mass of the piano is 357 kg. Ek= 1/2mv^2 Ek= 1/2(357)(33m/s)^2 Ek= 194386.5 J The problem is that my answer key has the answer 208kJ. What's my error? I have tried this problem many times. ...

### physics

A horizontal 791 N merry-go-round is a solid disk of radius 1.48 m, started from rest by a constant horizontal force of 50.0 N applied tangentially to the edge of the disk. Find the kinetic energy of the disk after 3.01 s. I am having trouble on which formula to exactly use ...

### Math And Science for Young Children

The conventional problem-solving strategies usually taught have been: A. act out the problem, make a drawing or diagram, and solve the problem. B. look for a pattern, construct a table, solve the problem, and look back. C. understand the problem, devise a plan, carry out the ...

### Physics

A particle moves with the acceleration a=2e(^-t)i+5cos(t)j In the instant when t=0 the particle is at the point r=i-3j with the velocity v=4i-3j. Calculate the velocity and position of the particle at any instant. I tried doing the problem and ended up just rearranging the ...

### History

Which of the following was a major factor contributing to the problem addressed in the quotation? a.) the sudden increase in property crimes b.) the problem of sanitation in cities c.) the mass crowding of city and tenement buildings d.) the problem of monitoring pollution ...

### Algebra II

Solving the formula for the indicated variable. I=prt,for r I need help knowing how to solve this problem step by step. its easier with numbers and a fraction in the problem but this problem just threw me off.......HELP PLEASE!!!!

### Math

This is a 3rd grade math problem that my son had on homework. Can you explain how to derive the answer for this problem? The problem, as wriitten, is below.... I have 10 thousands, 11 tens, 12 hundreds, and 0 ones. What number am I? Thank you

### Physics

Ok so this is just a small understanding problem, I do not want you to actually help me solve the problem, here it goes: A cylinder with mass 3kg slides on ice with its base surface at 5m/s and collides with an identical but stationary cylinder. The collision is elastic. After...

### physics (mechanics)

Practice problem: A rocket sled for testing equipment under large accelerations starts at rest and accelerates according to the expression: a= (2.8 m/s^3)t + (3.9 m/s^2) How far does the rocket move in the time interval t=0 to t=0.81 s? This is just a practice problem to help ...

### physics

Four point charges are located at the corners of a square with sides of length a. Two of the charges are +q, and two are -q. Find the magnitude and direction of the net electric force exerted on a charge +Q, located at the center of the square, for each of the following ...

### Algebra

Word Problem: Jack mows the lawn in 4 hours, mary mows the lawn in 5 hours. how long will it take them if they mowed the lawn together? I have a hard time figuring out which formula to use to solve a problem in a word problem can anyone help and tell me how to set up the ...

### physics

need help with physcis vector problem Using combining vectors to find displacement problem(BEST answer)? tourist on a jet ski move 1.2km 55 degrees North of E and then 3.15km 70 degrees south of east. determine the jet ski's displacement.

### Physics

A bullet of mass 3.3 10-3 kg moving at 750 m/s impacts with a large fixed block of wood and travels 5 cm before coming to rest. Assuming that the deceleration of the bullet is constant, find the force exerted by the wood on the bullet? I am confused on how to do this last ...

### math-college algebra

y-3=1/2(x-6) "finding the value of a variable" x=2 I know the answer is 1, but how do I work the problem to get 1. This problem is in our text book and in the back it states the answer is 1. I tried working the problem serval times and I do not come up with one.

### problem solving

select a problem that you have worked on but not yet solved, and that you feel you can eventually solve. present the following : a show or describe what you have done so far (it could be that you tell me where to find your work in your notebook) b assess how you feel about the...

### elementary

write a problem write a word problem involving the number of pages in a book.then write the numerical expression that you would need to use to solve your problem.

### Physics

This is a pretty simple physics problem, but I do not know how to go about it. How do I: Show that the time required for a projectile to reach its highest point is equal to the time for it to return to its original height?

### algebra

would you help me write a logic application for andy has the cards1,5,and 7 belle has the crds 5,4,and 7 carol has the cards 2,4 and 6 whats the salient facts of the problem? explain the strategy for solving the problem? present a step by step solution for the problem.

### algebra

i have two answers to this problem so am not sure which way I need to do in or should say the order i should do it. lease help??????? problem is 7x-5+3x=6+x-10 what is the order to work this out there is no brackets to this problem 7x-x+3x=6+5-10 6x+3x=11-10 8x=1 ------- 8 8 x...

### Science

We have a problem in AP Physics that we just can't get. It has to do with vector addition. The problem is: If aA+bB+C=0, find the magnitudes of a and b. *A, B, and C are vectors* *i and j are unite vectors* A=(6.0i-8.0j)units B=(-8.0i+3.0j)units C=(26.0i-19.0j)units How is ...

### physics problem ???

A projectile is ejected from a 25-m high tower with a velocity of 40 m/s at an angle of 30 degrees to the horizontal first on Earth and then on Mars. What is the ratio of the time taken to hit the ground on Mars compared to Earth?? (Assume gravity of mars= 0.38 gravity on ...

### communication

Buying time with limited agreement is a useful strategy when you: have too much work to do. cannot think of anything to say. want to avoid escalating a conflict but do not agree with the other person. know that the presenting problem is not the real problem but do not know ...

### More Math 2 See If You Can Help Me... :)

Problem: a^2-9 a^2-3a ----- * -------- a^2 a^2+a-12 Here Is What I Got: (a+3)3a ------- (a+4) *Please Check It.I think I did it wrong though.. =[ I'm going to assume your problem is this: (a^2-9)/a^2 * (a^2-3a)/(a^2+a-12) Note: I'm using * to mean multiply. If that is the ...

### chemistry

I'm confused on number 6 on the take home test. in this problem are we going to use the heat capacity of calorimeter is 2.21kJ/c. I'm confused on how to set this problem up 1)I converted 1.000kg in to grams= 1000g 2) I used q=m*c* the change in T 1000g*(4.184J/g* C)*(295.97 K...

### English

1. We had a problem with the hotel. 2. We had a problem about the hotel. 3. We had a problem on the hotel. 4. We had a problem related to the hotel. (Which one is similar to #1? Are they all grammatical and the same?))

### Physics

I am having a problem answering a physics question: A plane is heading due south and climbing at the rate of 60 km/hr. If its airspeed is 540 km/hr and there is a wind blowing 110 km/hr to the northwest, what is the ground speed of the plane?

### research in education

Using a laid down procedure for problem identification. Identify a problem in visally handicap and: (a) write the background of the study of the problem. (b) state the problem in interrogative and declarative form. (c) give significance of the study. (d) write two research ...

### Algebra

Describe how you know if an inequality is an “and” or an “or” problem. (use -3 < x+5 < 8). Also, how do you know if an absolute value question is an “and” or an “or” problem? Lastly, will you always have two solutions to an absolute value problem?

### ALGEBRA

Describe how you know if an inequality is an “and” or an “or” problem. (use -3 < x+5 < 8). Also, how do you know if an absolute value question is an “and” or an “or” problem? Lastly, will you always have two solutions to an absolute value problem?

### Thermodynamics

An insulated rigid tank contains 1.5 kg of helium at 30∘C and 500 kPa. A paddle wheel with a power rating of 0.1 kW is operated within the tank for 30 minutes. Cvof helium = 3.12 KJ/Kg.K Problem 7A. Calculate the net work done by helium, in kJ. Enter the number with ...

### Science- Physics Problem

I don't know if im doing these problems right, please help... A car accelerates at a constant rate from zero to 32.6 m/s in 10 seconds and then slows to 14.8 m/s in 5 seconds. What is its average acceleration to the nearest tenth of a m/s2 during the 15 seconds --would you do ...

### Business English

Buying time with limited agreement is a useful strategy when you: A. Have too much work to do. B. Cannot think of anything to say. C. Want to avoid escalating a conflict but do not agree with other person D. Know that the presenting problem is not the real problem but do not ...

### physics

i am going a center of gravity problem, with the x=w1(x1)+w2x2..../ W1+W2.. and i keep getting the wrong answer can someone please tell me what i am doing wrong this is the problem:Four objects are situated along the y axis as follows: a 1.94 kg object is at +3.27 m, a 2.76 kg...

### math help

Thank you for helping me with the last problem Reiny and Bosnian. However, I have one more problem that I need help with please and I have no idea how work the problem. I used an on line calculator to get the answer. It didn't give an explanation on how to do the problem ...