# physics please HELP !

128,227 results, page 54

### Physics

At the beginning of a new school term, a student moves a box of books by attaching a rope to the box and pulling with a force of 92 N at an angle of 30 as shown in the figure below. The box of books has a mass of 22.0 kg, and the coefficient of kinetic friction between the ...

### Physics repost

I know I have posted this question before but I have tried everything under the sun to no avail. Please help a clueless student!!!! A piece of copper wire is formed into a single circular loop of radius 13 cm. A magnetic field is oriented parallel to the normal to the loop, ...

### PHYSICS- please help

IMAGINE- a building 6400km. high. On the ground floor, a person weighs 175lbs when he steps on a spring scale how much would the man weigh on the same scale if he were standing at the top floor? HINT: Note that 6400km is also the radius of the earth so that the top floor is ...

### please help-- PHYSICS

IMAGINE- a building 6400km. high. On the ground floor, a person weighs 175lbs when he steps on a spring scale how much would the man weigh on the same scale if he were standing at the top floor? HINT: Note that 6400km is also the radius of the earth so that the top floor is ...

### Physics (PLEASE HELP!)

Two point charges, the first with a charge of +3.25×10−6 C and the second with a charge of -4.63×10−6 C , are separated by 25.5 cm. Find the magnitude of the electrostatic force experienced by the positive charge. Is the magnitude of the force experienced by the ...

### physics

Calculate the heat given off by the hot water. GIVEN: Original quantity of water (hot water) 50g Orig.temperature :40°C Final temperature: 9°C Final quantity of water: 264g Increase in quantity of water 214g. PLEASE KINDLY SHOW ME THE EQUATION FOR THIS THANK YOU. <3

### physics

Calculate the heat given off by the hot water. GIVEN: Original quantity of water (hot water) 50g Orig.temperature :40°C Final temperature: 9°C Final quantity of water: 264g Increase in quantity of water 214g. PLEASE KINDLY SHOW ME THE EQUATION FOR THIS THANK YOU. <3

### physics

Calculate the heat given off by the hot water. GIVEN: Original quantity of water (hot water) 50g Orig.temperature :40°C Final temperature: 9°C Final quantity of water: 264g Increase in quantity of water 214g. PLEASE KINDLY SHOW ME THE EQUATION FOR THIS THANK YOU. <3

### physics

Calculate the heat given off by the hot water. GIVEN: Original quantity of water (hot water) 50g Orig.temperature :40°C Final temperature: 9°C Final quantity of water: 264g Increase in quantity of water 214g. PLEASE KINDLY SHOW ME THE EQUATION FOR THIS THANK YOU. <3

### English please check my answer

Please see if I have the correct answer thank you The patient went into cardiac arrest. The- (iac) portion of the word is A. noun suffix B. plural suffix C. combining form D. adjective suffix My choice is B

### Science (please help)

Review Ch. 10 and 11 of your text, then complete the following: Provide at least three freshwater and three ocean water resource challenges by filling in the following table. I have each of the three sources but I am unsure what they mean by "description" can someone help please

### To Ani - re Afrikaans post

I have deleted your post because you included your email address in it. That is not a safe thing to do online. Please remember NOT to post any personal information. Please also remember to ask a specific question. No one will be able to help you if you don't let us know ...

### Chemistry

At a certain temperature, the Kp for the decomposition of H2S is 0.832 H2S (g) <-- --> H2 (g) + S (g) Initially, only H2S is present at a pressue of 0.121 atm in a closed container. what is the total pressure in the container at equilibrium? Please tell me how to do it ...

### Chemistry

At a certain temperature, the Kp for the decomposition of H2S is 0.832 H2S (g) <-- --> H2 (g) + S (g) Initially, only H2S is present at a pressue of 0.121 atm in a closed container. what is the total pressure in the container at equilibrium? Please tell me how to do it ...

### Math for 7th graders///////

In a survey 182 people said they liked chocolate ice cream the best. This is 35% of all the people surveyed. How many people were surveyed??? Please tell me the answer and please show your work so I could understand how you figured it out!???

### Science please help

I am doing a crossword puzzle that has statements that you write their answers in the right column. I have two that I can't get. Heart of a scientific investigation what I have so far: --e-t-- standard of comparison for checking the results of an experiment what i have so far...

### Chemistry

(DrBob222 please help me) What would be the final temperature of the system if 16.6 g of lead at 138 ◦C is dropped into 23.4 g of water at 8.68 ◦C in an insulated container? The specific heat of lead is 0.128 J/g◦C. Please explain with the numbers plugged in ...

### vector calculus

Can someone help me with this please. A vector field in cylindrical polar co-ordinates is given by V = R Rˆ + R 3 s i n ( φ ) c o s ( φ ) φˆ + 3 z kˆ where Rˆ, φˆ, kˆ are the appropriate unit vectors. Translate this vector field into the Cartesian x, y, z co-ordinate...

### american history please help very important

I need to do very good on this and i have to find 4 events before ferdands murder that led up/contributed to the start of world war 1. And i have to give specific examples. Please help me out!!!! It would mean so much

### EVERYTHING

Can anyone help me with these. I want different views please. In separate paragraphs describe your approach to classroom organization, motivation, discipline, and teaching styles, given your current perspective. Contrast each element of this paper with the opposite approach (...

### math

so it would be like 500 divided by 140 for ted and tony ..... 120 because of ted and tom but wait i think i am doing this wrong can you at least give me the answers and i will follow you and that for you to explain to me please i give up i hate percents ....its due tommorow ...

### College Chemistry

Calculate pH of a 1.0 mol L -1 boric acid solution. (Ka(H3BO3) = 5.8 x 10 power -10 Please solve this problem. My computer does not have the power symbol. Can you please show maths and steps. Is mollar mass required of the above. Is -log and constant above used. Thanks

### general

What are the various long-term and short-term impacts of food wastage? Please give answers from multiple area eg. cultural,social,economics etc. Global warming I have found out about it so please give a more insightful answe

### 7th grade science bobpursley or Ms. sue please

Can you guys help me please? I have no idea what these answers are. Thanks! 1. Explain in detail one of the climate change cause-and effect relationships. 2. Explain why a new moon is not visible and the difference between the waxing and waning phases of the moon.

### Statistics & Probability

If X is a normal random variable with mean 11, and if the probability that X is less than 12.10 is .72 , then what is the standard deviation of X? Select one: a. 3.00 b. 6.25 c. 2.50 d. 1.25 Please note that the answer for the above is stated as c.2.50. However, my answer ...

### algebra

Please Helpppp!!! Mother having a hard time with radicals. A playground is shaped like a rectangle with a width 5 times its length (l). What is a simplified expression for the distance between opposite corners of the playground? Please can you post step-by-step so I understand...

### TRIGONOMETRY

Can someone please show me step by step how to calculate the modulus and the argument for these complex numbers? I have a trig final next week and I am trying to finish this study guide so I am prepared. Thank you so much! If you can, please show my how you get the answer so I...

### Math

A commercial refrigerator unit accidentally releases 12.5 L of ammonia gas at SATP. Determine the mass and number of molecules of ammonia gas released. Please if possible show the steps because I have an exam in an hour and I was trying this question and Im clueless. Please ...

### writing please someone help!!!

which traits are strongest in your persuasive essay: ideas, organization, voice, word choice, sentence, fluency, or conversation? provide textual evidence from your essay to support your answer. Please can someone help I'm having trouble figuring this one out!!!!

### Please Help ASAP!! Algebra

A number cube is rolled with these results: 64 ones, 67 twos, 73 threes, 59 fours, 72 fives, and 71 sixes. What is the experimental probability of rolling an even number? Write your answer as a percent, to the nearest tenth of a percent... A. 51.9% B. 48.5% C. 53.6% D. 46.8% ...

### Math

Can someone please help me with this. I'm not getting the right answer. Jill traveled to canada and bought a lamp for 460 canadian dollars. In US dollars (to the nearest cent)this is equivalent to 577.25 517.77 450.52 480.66 Can you please show me how you got your answer.The ...

### MATH HELP PLEASE!!

Given a long algebraic equation, what are some strategies that you can use to make simplifying and evaluating the equation more efficient and accurate? How do inverse operations help solve algebraic equations? Give a real-world scenario where this might be modeled. Help, ...

### please check my answer

please check my answer thanks :) four chairs at $22.00 each 1 table for $212 and umbrella for $85 What is the total of this bill if the sales tax is 6% $22 x 4 ----- 88 212 + 85 -------- 385 x 0.6 % -------------

### please check my answer

please check my answer thanks :) four chairs at $22.00 each 1 table for $212 and umbrella for $85 What is the total of this bill if the sales tax is 6% $22 x 4 ----- 88 212 + 85 -------- 385 x 0.6 % -------------

### Reading HELP PLEASE!!!!!!!!!!!

Can someone send me like a book report form? Like the way to write a book report? I neeed help please! Oh and thanks Miss Sue for the help!

### social studies

I need to know some resources that are in the countries of the south. Please LIST the resources. DON'T give me any sites. I need help, I tried to find some, but I couldn.t Please help me. THANKS!:):):):):):):):):):):):)

### chem--please help me!!

when a 25.0 mL sample of an unknown acid was titrated with a 0.100 M NaOH solution. Determine Ka for the unknown acid. Volume NaOH = 12.5 mL; pH=3.80 please help me explain in details!!!

### math

HELP PLEASE! I don't understand how to do the problem! Please help thanks(: The problem is: your bike tire has a radius of 14 inches. If your tire makes 100 revolutions, how many feet does your bike travel? THANKS! :D

### Science (Please help!!)

creating a prototype and troubleshooting are steps in the development of a: a new scientific theory b: a new experiment c: a new scientific law d: a new technology ******* Please help =)

### physics please helpp

A copper sheet of thickness 2.09 mm is bonded to a steel sheet of thickness 1.35 mm. The outside surface of the copper sheet is held at a temperature of 100.0°C and the steel sheet at 26.3°C. a) Determine the temperature (in °C) of the copper-steel interface? b) How much ...

### Physics

A soccer ball is kicked with resultant velocity of 22.6 m/s at an angle of 60 degrees. What is the time to Apex, what is the range of the kick? r = 22.6 angle = 60 degrees 1)Vxi=sin(60)(22.6) = 19.57 Vyi=cos(60)(22.6) = 11.3 2)T= Vyf-Vyi/A 0-11.3/-9.81 = 1.1 sec time to apex ...

### Statistics

The rate of chlamydia infection was reported as 2.78% in a recent year. Under certain conditions, a preliminary screening test for the chlamydia bacterium is correct 96% of the time. One person is randomly selected from the population. find the true positive. Can someone ...

### Physics

Consider the system shown in the figure with m1 = 25.00 kg, m2 = 10.20 kg, R = 0.18 m, and the mass of the uniform pulley M = 5.00 kg. Object m2 is resting on the floor, and object m1 is 4.00 m above the floor when it is released from rest. The pulley axis is frictionless. The...

### Physics (please help!!!!)

Lacking thrust, a glider can’t maintain level flight at constant speed in still air. It can, however, glide at a constant speed at a fixed downward angle. Find this angle in terms of the lift and drag coefficients CL and CD. Recall that lift is perpendicular to the glider’...

### Physics

A man stands on a freely rotating platform, as shown, holding an exercise dumbbell in each hand. With outstretched arms, his angular speed is 1.5 rad/s. After he has pulled his arms in, as shown, his angular speed is 5 rad/s. What is the ratio of his final rotational KE to his...

### Physics

A man (weighing 915 N) stands on a long railroad flatcar (weighing 2805 N) as it rolls at 18.0 m/s in the positive direction of an x axis, with negligible friction. Then the man runs along the flatcar in the negative x direction at 40.00 m/s relative to the flatcar. What is ...

### physics

Please Help, Two point charges are fixed on the y axis: a negative point charge q1 = -23 µC at y1 = +0.23 m and a positive point charge q2 at y2 = +0.33 m. A third point charge q = +7.8 µC is fixed at the origin. The net electrostatic force exerted on the charge q by the ...

### Physics (Urgent Please!)

Two parallel wires conduct equal currents in the same direction. (a) At a point in the plane of the wires midway between them, do the individual fields of the wires cancel or reinforce each other? (b) At a point far away from the wires, do their individual fields tend to ...

### physics please urgently

A body whose weight is W1=75N is tied to another body whose weight is W2=45N .If the coefficient of kinetic friction between W1 and the inclined plane (25°)AB is 0.15,calculate the coefficient of kinetic between W2 and the inclined plane(15°) BC when the two masses slide ...

### Social Studies

What are some of the coolest facts about Washington D. C.? Please answer my question soon! its not in washington! Please see the answer I posted to your first question. Although it is our capitol, it is not one of the states

### algebra, help please!!!

what is a function and how do u tell the difference between one and something else? in my hw, there's these 3 graphs, all have a column for inputs and outputs and we have to point out which one or two represents a function...please help me! thank u so much!

### science

Please check my work 3M solution of NaOH (1 liter worth) molecular weight: 39.99 3 x 39.99= 119.97 grams dilute to 1000mL 3 M solution of HCl (1 L) c1v1=c2v2 (12M)(?)= (3M)(1000mL) ?= 250 mL please check thank you

### writing

i have an essay exam tomorrow, please can someone help me get some ideas about symbolic violence and how it effects men. I need it as soon as possible; because i have no idea about anything. Please someone help me!!!

### English

I have an essay exam tomorrow, please can someone help me get some ideas about symbolic violence and how it effects men. I need it as soon as possible; because i have no idea about anything. Please someone help me!!!

### help ms.sue

whats one opinion about leukemia.i all ready wrote a fact but i baerly know anything about it so i can not write a opinion please.this is just home work ? please help me ms.sue from, priscilla perez

### Literature- Frankenstein

Consider the protagonist in "Frankenstein". Explain how Victor Frankenstein character changes over the course of the novel, Frankenstein. Please include examples of these changes in the response. I have to write no fewer than three paragraphs, so please help. Thanks!

### Math

Hair grows at the rate of one centimeter a month. What is the rate expressed in nanometers per second. There are one billion nm in a meter. There are 100 cm in a meter. Please HELP. Can you please write out how you found the answer.

### Social studies

I really need help on this, please! I've been reading my book for an hour and found no answer. Ok so here it is: Sumer lacked resources such as ... I have to list three resources that Sumer lacked. Please help. Thanks !

### ALG@ NEED HELP PLEASE

Explain how to factor the following trinomials forms: x2 + bx + c and ax2 + bx + c. I am totally lost still I read and read and the concept is lost in my head. Can someone please help me? I know there is more than one way to Factor this.

### mat/116

Will someone please help me slove this problem? Use the elimination method to solve the system of equations. 5u+2v=-18 3u+v=-5 I have tried to solve this problem several times and have not gotten the correct answer please help. Thank you.

### Calculous

g(x) = x^4-8x^3-16x^2+128x the graph goes through the x through (-4,0) , (0,0) (4,0), (8,0) horizontal axis has a scale of 2,4,6,8,10 (each tick increases by 2) Y-axis value that is the highest is (-4,30) and (8,30) Assume g(x) = k(x-p)(x-q)(x-r)(x-s) p<q<r<s I need ...

### Trig please

The height h in inches of pistons 1 and 2 in an automobile engine can be modeled by h1 = 3.75sin(733t) + 7.5 and h2 = 3.75sin[733(t+ 4π/3)] + 7.5 where t is measured in seconds. How often are these two pistons at the same height? Show work please.

### Physics...please help!!!

if you draw 4 points in a square shape and try to join them all with non-crossing path you can do that, but if you draw 5 points in a shape of pentagon and try to join them it does not work. So, the question is how to prove using one of Euler's equation that its not possible ...

### Physics

I thought I did the problem right, but I don't think I came out with the right answer! Please someone check to see if I got this problem right. Calculate the force of gravity between Earth (mass=6.0*10^24 kg) and the moon (mass=7.4*10^22 kg). The average Earth-moon distance is...

### Physics (Please Help)

A map of a burned area obtined from remote sensing contains 120 pixels. The remote sensing image shows that the fire is isolated to 73 of the 120 pixels. a) how many km^2 of forest does the image represent? b) how many km^2 of the forest is burned? c) how many km^2 of forest ...

### Physics

Figure a is a partial graph of the position function x(t) for a simple harmonic oscillator with an angular frequency of 1.75 rad/s; figure b is a partial graph of the corresponding velocity function v(t). The vertical axis scales are set by xs = 2.50 cm and vs = 2.50 cm/s. ...

### college physics helpasap

The water skier in the figure is at an angle of 35degree with respect to the center line of the boat, and is being pulled at a constant speed of 15m/s . 1)If the tension in the tow rope is 90.0N, how much work does the rope do on the skier in 30.0s ? 2)How much work does the ...

### math

In a class of 50 student 28,22,20 of them offer physics,chemistry and biology respectively also,4 of them offer physics and chemistry but not biology,3 offer physic and biology but not chemistry,6 offer biology and chemistry but not physics if 13 of them offer physics only how...

### business

Out of the types of businesses (sole proprietorship, partnership, and corporation), which has the easiest time obtaining money to expand their business. Why? Please note that we don't do students' homework for them. Once you have come up with a response to these questions, ...

### Maths-Vectors Help!

Please help confirm if I got this problem correctly; 1)2jx(3i-4k) sol>> 2x3jxi - 2x4jxk = 6jxi - 8jxk = 6k - 8i 2) (i-2j)xk Solutn>> ixk - 2jxk = -j - 2i 3) (2i-4k)x(ix2j) solutn>>2ixi Please do help with this ONE yes, correct. On the third, break recheck if ...

### math

here is my problems url its typed with spaces please rewrite it with out space to see the image. and it wont need password or anything go to (zshare . net )/image/126113093ead8f03 the question is to: *find the area of the shaded region. the side that i marked 19 in is actuly 9...

### AP Calculus - High School

The Temperature T of food put in a freezer is T = (700) / t^2+4t+10 where t is the time in hours. Find the rate of change of T with respect to t at each of the following times. a. t=1 b. t=3 c. t=5 d. t=10 ** i'll be able to do the others on my own if you please explain step ...

### Language Art (Please Check)

please check 6.which of the following is a run-on sentence? A.terri had a hard time continuing the tour she was so tired from the day's events.(I PICK A) B.som students decided to rest,so they returned to their hotel. C.washington is a great place to visit because there are so...

### physics help please

The two blocks are connected by a light string that passes over a frictionless pulley with a negligible mass. The 3 kg block lies on a rough horizontal surface with a constant coefficient of kinetic friction 0:3. The hanging block has a mass of 8 kg. The system starts from ...

### Physics - Re-post

A .20 kg ball is attached to a vertical spring. The spring constant is 28 N/m. The ball is supported initially so that the spring is neither stretched or compressed, is released from rest. How far does the ball fall before brought to a momentary stop by the spring? Our teacher...

### Chemistry

Please check this over and see of they are right...if they are not can you please tell the the right answer and explain how you got it. I think I am getting myself confused. Thank you. Write the neutralization reaction for each of the following. Balance the equations. a. HI(aq...

### Physics

I understand this question: 4. If a pendulum completes 40 vibrations in a minute, what is its period? The period is the time for one complete cycle, and if the pendulum takes one minute (or 60 seconds) for 40 vibrational cycles, then it must take 1.5 seconds for one complete ...

### AED

List five key educational issues related to the First Amendment from your reading. Briefly describe how each issue impacts the classroom. Give intext citations and references for sources used in this paper. Please attach. Paragraphs are indented 5 spaces for new ideas/time ...

### 9th grade algebra

I've never seen a problem like this, please help. I think we have the number part right but what would the unit be once the math is done? Please show me how you came up with the answer so I will know for next time. 30 miles/1 ton x 5280 feet/1 mile x 1 hour/60 minutes x 1 ...

### algebra

Please please help, this is like the only thing i am having trouble on right now, and no one my my family knows about this stuff. Any help would be great! (: x 3 6 9 12 f(x) 9 18 27 36 Does this relationship show direct linear variation?_______________ If so, what is your k ...

### physics

We are doing the force table lab in class and now we are calculating the f equilibran and the equilibrant angle. I had no time graphing a solution and came up with the right answers by measuring, but we are also suppose to do it purely mathematically and I do not know how to. ...

### Gr. 10 CIVICS!!!!please HELP!! :(

can u please help me find a picture that shows one of the element in a democracy. the element is Being Informed and Getting Involved. the picture has to fulfill this element. thanks .u can just paste the site of the picture.

### physics - Damon

PLEASE SEE ADDITIONAL QUESTION AT BOTTOM. A pendulum was set up and measurements were made to enable the mechanical energy to be calculated at the start position S and the lowest point of the pendulums swing L. The mass of the pendulum bob was determined on an electronic scale...

### physics

Why does a narrow strip of paper, attatched to a vent that is blowing air at a steady rate, wave and flap? I havn't taken physics yet but I would like to know the answer this question.

### English

1. Hello. May I speak to Tom? Speaking. Who's this? Hi,Tom. This is Sam. How are you doing? Just fine. How about you? I'm so-so. How is your school? Oh, it's great. I like it very much. 2. Hello. May I speak to Tom? He is not in now. Can I take a messsage? OK. Ask him to call ...

### Math - Help with radicals please

Please show work Simplify rational 1. 4√(a^6 b^13) / 4√(a^2b) 2.√(2x^3 / 49y^4) Add or Subtract 3. x√(75xy) - √(27x^3y) Multiply 4.(√(5) - 5) (2√(5) + 2) Rationalize the denominator 5. √(25x^5 / 3y^2) 6. 5 / 2-√(7)

### physics!

An Alaskan recue plane drops a package of emergency rations to a stranded party of explorers, as illustrated. The plane is traveling horizontally at 100.0m/s at a height of 50.0 m above ground. What horizontal distance does the package tral before striking the ground? I got ...

### Physics

A crazed armadillo with a mass of 60kg stands at the center of a rope which was initially strung horizontally between two poles 50m apart. Its weight causes the rope to sag 1.20m. What is the tension in the rope Solution: 2Tsin(angle) - mg = 0 Tan-1() = 1.2/25 = 2.75° 2Tsin(2...

### help me please physics

A monatomic ideal gas expands from point A to point B along the path shown in the drawing. (a) Determine the work done by the gas. J (b) The temperature of the gas at point A is 198 K. What is its temperature at point B? K (c) How much heat has been added to the gas during the...

### PHYSICS please HELP

A box is lifted with a pry bar, by slipping the bar under the box and lifting up on the bar. If the pry bar is 2m in length and it is grasped at the end, and the box is located at the opposite end, the fulcrum, with its center of gravity at a distance of 0.5 m from the fulcrum...

### physics

could someone please break this down and show me how to do it? A fishtank with inside dimensions of 30.5 cm X 61 cm X 30.5 cm is filled with water. What is the volume in cm3 of water required? What is the mass in grams of the water required? What is the mass in kilograms The ...

### Physics

An electron is accelerated from rest through a potential difference that has a magnitude of 2.70 × 107 V. The mass of the electron is 9.11 × 10-31 kg, and the negative charge of the electron has a magnitude of 1.60 × 10-19 C. (a) What is the relativistic kinetic energy (in ...

### Soc. Studies - Help please

2nd time asking this question - need further clarification - please What was the outcome of the Alliance for Progress? A.Americans opposed Kennedy’s policies. B.Relations between the United States and Latin America improved. C.Relations between the United States and Latin ...

### physics

A friend in a spaceship travels past you at a high speed. He tells you that his ship is 20m long and that the identical ship you are sitting in is 19m long. According to your observations, (a) how long is your ship?? (B) how long is his ship?? (c) what is the speed of your ...

### physics

On a perfect fall day, you are hovering at low altitude in a hot-air balloon, accelerated neither upward nor downward. The total weight of the balloon, including its load and the hot air in it, is 24000 N. Find the weight of the displaced air. !!I got this: it is 2.4×10^4 N I...

### please help with economics!

Hi, please help me with this econs question! thanks! I'm asked to sketch the average and marginal cost curves of a software company, in which when it first starts up, the costs are extremely high. (High start up costs, millions of dollar spent to make the software)But after it...

### Math Urgent Please Help

Which construction is illustrated below? a. a perpendicular to a given line from a point not on the line b. a perpendicular to a given line from a point on the line c. perpendicular bisector of a given segment d. bisector of a line segment Please help with this. It doesn't get...

### physics 2, help please

Two masses (mA= 2 kg, mB= 4 kg) are attached to a (massless) meter stick, at the 0 and 75 cm marks, respectively. c.) Now, if mass B was removed, how much force would need to be exerted at the 100 cm mark in order to keep the meter stick level*? ? N d.) Now, if mass B was ...

### Physics

Would someone check this please? A circular loop of wire of radius 0.10 m and of resistance 2.0 ~ 10−3 ƒ¶ is in a region where there is a uniform magnetic field B. The field is at 30‹ to the normal to the plane of the wire loop as shown in Figure 3. The magnitude...