# physics please HELP !

126,957 results, page 66

### geometric

I need help on this following problem: The length of a rectangle measures 1 cm less than its width. The perimeter of the rectangle is 106 cm. Find the dimensions of the rectangle. Now i have tried to solve this problem in multiple attempts as can be seen here: 54+53=107, 53+52...

### Algebra

I need help on this following problem: The length of a rectangle measures 1 cm less than its width. The perimeter of the rectangle is 106 cm. Find the dimensions of the rectangle. Now i have tried to solve this problem in multiple attempts as can be seen here: 54+53=107, 53+52...

### physics

A particle has a kinetic energy equal to its rest energy. (a) What is the speed of this particle? (b) If the kinetic energy of this particle is doubled, does its speed increase by more than, less than, or exactly a factor of 2? (c) Explain (d) Calculate the speed of a particle...

### physics

in archery should the arrow be aimed directly at the target? how should your angle of aim depend on the distance of the target? (AP physics)

### physics

a solid X, insoluble in water, weighs 180g in air and 150g in water. what is the relative density of the solid X? it is the physics question.

### math,correction please

Problem #1 Solve by completing the square 2x^2-4x-11=0 My answer: x = (2+/-sqrt 26)/(2) Problem #2 Solve by using the quadratic formula x^2-4x-60=0 My answer: x = (2+/-sqrt 16)/(2) You did not do it completeing the square. Please show work. ON the second b^2-4ac is 16+240. How...

### law please check my answer

please check my answer thanks :) Dr Bob thinks Sue a minor needs an operation . Sue's parents give their consent to the oeration this is an example of an informed consent True or False I said True

### chemistry

Please help. Concentrated hydrochloric acid is a 38% w/w solution of HCL in water and has a density of 1.18g/ml. How many millilitres of concentrated hydrochloric acid are needed to prepare 500ml of a 1:200 w/v HCL solution? My answer is 2.12ml. I'm not sure if its correct. ...

### science

Please help. Concentrated hydrochloric acid is a 38% w/w solution of HCL in water and has a density of 1.18g/ml. How many millilitres of concentrated hydrochloric acid are needed to prepare 500ml of a 1:200 w/v HCL solution? My answer is 2.12ml. I'm not sure if its correct. ...

### check my answer please

A ball of mass 2kg travelling in a straight line at 4ms^-1 is acted on by a force of 3N acting in the direction of motion for 5 seconds. What is the speed of the ball after 5 seconds? vf=vi+at but a=force/mass a = 3÷2= 1.5 vf=4+1.5×5= vf=4+7.5 vf=11.5m/s^-1 Is this correct? ...

### Algebra, help please!!!

Fill in the following blanks to find other expressions for 5%: A: ___ for every 100 B: ___ for every 50 C: 1 for every ___ D: 8 for every ___ E: 0.5 for every ___ Please help, very confused by this problem.

### Physics - Electricity

Can you please check my answers. 1) What carries energy through wire? electrons 2) What happens to some of the energy when it moves through the wire? becomes lost due to the movement of energy requiring some kinetic energy 3) If a resistance is large, why does the wire heat up...

### Science_PLEASE HELP ME!!!

how can paired chromosomes differ? PLEASE HELP ME!!! Each of the paired chromosomes are received one from the father and the other from the mother. They reflect their own personal genetic makeup. That's how they can differ. I hope this helps. If not, please repost with any ...

### College math

Can someone please assist me The problem reads "use the rule of 78 to find the payoff amount for the loan paid in full before the date" Finance charge: $717 Total number of payments 41 Amount per payment $155 Remaining payments when paid in full 10 Please help. Thanks in advance

### COURSE HELP MEEE

Hi i want to be a pediatrician when i grw up so what course should i take in college ? im already in 3rd yr high school... in the philippines , as for me , i surpassed the k12 before they implement it and the next yr we our batch will be the lasy 4th yr hgh school students to ...

### math series2(please helpassessment tomorrow)

The second moment of area of a rectangle through its centroid is given by: bL3/12 Using the approximation for binomial series valid for small x (+ve or –ve): (1+x)^n=1+nx/1!+(n(n-1) x^2)/2!+⋯ 1+nx Determine the approximate change in the second moment of area if b is ...

### Math ms sue please help!!!!!!

Simple probability You have 20 crayons to choose from : 5 are blue, 3 are green, 8 are red and 4 are orange. If you randomly choose one crayon, what is the probability you will get armed crayon? P(red)= I put 8 to 20= I put 80% but my friend said 40% who's correct? Help please...

### Help ASAP

I'm having trouble with the surface area of the sphere. Like, here's a question I'm having trouble solving: What is the approximate surface area of the sphere if it is 7 centimeters? a. 615 cm^2 b. 539 cm^2 c. 154 cm^2 d. 84 cm^2 Please show all work and how you solvedi t. ...

### PHYSICS - Waves

Can someone tell me how to get the answer to this question? Just a formula would be great. It's on my physics study guide for my unit test. If 3 sound waves pass a microphone in 4.0 s while traveling 5.0 m/s, what is the wavelength of the waves? (6.67 m)

### Physics

800 n student is standing in middle of frozen pond stranded 6.4 m from shore only thing he has is physics book which has mass of 3 kg so he throws it at 10 m/s toward one shore how long does it take him to reach opposite shore

### Question Please

I just need help understanding something. My homework reads: These chapters introduced you to the role of art in architecture in each of these cultures (Early Christian, Byzantine, and Islamic art), the link they provide me is suppose to give me access to significant ...

### English

Customer Officer: May I have your declaration from, please? . . Customer Officer : Sure. Please open your suitcase. (Is the expression 'suitcase' correct in this situation? Do you have some other suitable expressions? Correct the errors, plese.)

### geography

can someone please help in my geo H.W:- supposed to pick any country in the world [not india] & describe the seasons it experiences 2.why it experience that season ? 3.what are the special features of the season it experiences? i was a bit confused which country to pick & why...

### Math

Please show me how to enter this into scientific calculator the equation is 30*0.6637 - 29*0.6223*e^(-0.05*0.137) and the answer is 1.99 i don't know how to enter the e^(-0.05*0.137) part. please show me detailed steps. my scientific calculator is fx-991w (google it if ...

### physics

A car initially traveling eastward turns north by traveling in a circular path at uniform speed as in the figure. The length of the arc ABC is 259 m, and the car completes the turn in 38.0 s. a)Determine the car's speed.m/s b)What is the magnitude and direction of the ...

### Physics- check answer please

I am supposed to fill in the blanks without a word bank. 1. I you push a crate with 40 N of force at an angle of 30 degrees and your friend pushes with a force of 40 N horizontally, the amount of work you are doing is _____ the amount of work your friend is doing on the crate ...

### college Physics

A playground is on the flat roof of a city school, 5.2 m above the street below (see figure). The vertical wall of the building is h = 6.50 m high, forming a 1.3-m-high railing around the playground. A ball has fallen to the street below, and a passerby returns it by launching...

### Physics

a 123 kg man space finds himself 60 m away from his space ship and wants to get back. he holds a 2kg space gun which fires 5.00g bullet at a rate of 1500m/s. if he fires a single bullet in a direction directly away from the spaceship, how long would it take the man to arrive ...

### PHYSICS

a 123 kg man space finds himself 60 m away from his space ship and wants to get back. he holds a 2kg space gun which fires 5.00g bullet at a rate of 1500m/s. if he fires a single bullet in a direction directly away from the spaceship, how long would it take the man to arrive ...

### physics please help!!

A distant galaxy is simultaneously rotating and receding from the earth. As the drawing shows, the galactic center is receding from the earth at a relative speed of uG = 1.90 106 m/s. Relative to the center, the tangential speed is vT = 3.00 105 m/s for locations A and B, ...

### 11th Grade Physics

An aircraft has a take-off speed 180km/h and length 250m from the start just before take-off a serious snag is detected in the engine and the aircraft failed to take-off. There is a wall at a distance 'd' = 230m ahead of the take-off point. The pilot applies breaks which ...

### Physics please help cant figure this out

starting with an initial speed of 5.00 m/s at a height of 0.265 m, a 1.75 kg ball swings downward and strikes a 4.45 kg ball that is at rest, as the drawing shows. (a) Using the principle of conservation of mechanical energy, find the speed of the 1.75 kg ball just before ...

### Physics

Hello, I am doing a physics experiment regarding rotational motion and equilibrium. We have the following lab setup and are supposed to find the unknown mass. How should I approach this? file:///C:/Users/Rahul/Desktop/Lab%20Drawing.jpg

### physics

Identify the area of physics that is most relevant to each of the following situations. a)A high school football game b)Food preparation for the prom c)Playing in the school band d)Lightning in a thunderstorm e)Wearing a pair of sunglasses outside in the sun

### physics

A bowling ball encounters a 0.76m vertical rise on the way back to the ball rack. Ignore frictional losses and assume that the mass of the ball is distributed uniformly. If the translational speed of the ball is 3.80m/s at the bottom of the rise, find the translational speed ...

### language

i did a tercet poem. can you please tell me if its a good poem please or if there are any mistakes? thanks. The Funny Dog I saw a dog He was walking in the fog So he couldn’t see and got stuck in a log. He can jump up high So he likes to pretend he can fly Up in the big blue...

### Chemistry

Please help me with this question: Calculate the theoretical yield amount of CaCl2 that would be required to change the temp of 50ml of water from room temp 20degree to 45 degrees. Heat Capacity H20 is 4.184 Jg^-1deg^-1 and density is 1g/mL. I've already calculated: Q=mc delta...

### pre ap physics

** When s conducting sphere is charged positively, initially the charge is deposited on the left side. However, due to the sphere's conducting nature, the charge spreads uniformly throughout the surface of the sphere. Charge is uniformly distributed because: ** A. charged ...

### Health please check my answer

Please check my answer thanks Is this statement True or False A 16 -year old patient is having problems with a swollen gland on the left side of her neck, The physican is most likely to use visualization to determine if the gland has any atypical characteristics. My answer is ...

### health

should schools educate teenager about contraception methods or focus only on abstience? please help me, i think yes they should because there are many teenagers who prefer not to adopt abstience. so they should have proper knowledge about contraception. but i need two reasons ...

### Math. Have answer, please show work

In a tracer method the potassium isotope 42K is used for labelling. The half life of 42K is 12.5 hours. If No is original number of atoms, how many hours will it take until only (1/1024) No Atoms remain? The answer is 125 hours but I do not know how to get this. Please help!

### physics

A 175 kg merry-go-round in the shape of a uniform, solid, horizontal disk of radius 1.50 m is set in motion by wrapping a rope about the rim of the disk and pulling on the rope. What constant force would have to be exerted on the rope to bring the merry-go-round from rest to ...

### Physics

A 0.26 kg rock is thrown vertically upward from the top of a cliff that is 27 m high. When it hits the ground at the base of the cliff the rock has a speed of 24 m/s. (a) Assuming that air resistance can be ignored, find the initial speed of the rock. (b) Find the greatest ...

### Physics

I need help solving this please! I think that for part (b) I can use energy and wavelength to solve for frequency and the one with the highest frequency is the most damaging, but I'm not sure what to do for part (a). You want to study a biological specimen by means of a ...

### physics

You are given a vector in the xy plane that has a magnitude of 94.0 units and a y component of -44.0 units. A. What are the two possibilities for its component? For this part I got x = 83.1 and -83.1 B. Assuming the x component is known to be positive, specify the vector V ...

### Maths

You have seven balls labelled 1,2,…,7 and seven unlabelled, indistinguishable boxes. How many different ways can the balls be placed into the boxes? Can anyone please work the complete solution. I got the answer but it was solved by my brother and he challenged me to get the...

### chemistry

can you please give me one practical application of analytical chemistry in being a medical technologist? i know it will determine the separation event happening on the lab test... but is that already a practical application? or i have to cite a deeper example? please give me ...

### 6th Grade Geometry Help Please

Hi again, so when calculating a circle's dimensions, circumference and area do you use the squared symbol and for a rectangular prism's dimensions, surface area, and volume do you use the squared symbol? Please respond quickly!!! Thank You Very Much.

### PLEASE HELP ASAP!! Algebra

The probability that Shania is on time for school is 1/2. Find the probability that Shania arrives on time for school for the next 5 days. Express your answer as a percent, to the nearest tenth of a percent. A. 50% B. 15.6% C. 11.4% D. 3.1% ALSO, PLEASE EXPLAIN THOROUGHLY!! ...

### Math(HELP PLEASE )

Complete the given table for the equation 4x+y=9 The following given table is x y -1 13 3 5 2 -3 Roll X is missing two numbers and Roll y is missing three numbers Please someone help. I have been stuck on this question for to long and can not move on to next assignment. Thanks

### physics--please help

You are traveling in a car toward a hill at a speed of 40.8 mph. The car's horn emits sound waves of frequency 243 Hz, which move with a speed of 340 m/s.The frequency with which the waves strike the hill is 254.7Hz and the frequency of the reflected sound waves you hear 271.2...

### physics--please help

You are traveling in a car toward a hill at a speed of 40.8 mph. The car's horn emits sound waves of frequency 243 Hz, which move with a speed of 340 m/s.The frequency with which the waves strike the hill is 254.7Hz and the frequency of the reflected sound waves you hear 271.2...

### Physics

A puck is moving on an air hockey table. Relative to an x, y coordinate system at time t = 0 s, the x components of the puck's initial velocity and acceleration are v0x = +0.8 m/s and ax = +0.9 m/s2. The y components of the puck's initial velocity and acceleration are v0y = +2...

### English

I am trying to find a connection between Invisible man by Ralph Ellison and got tell it on the mountain by James Baldwin. The only connection I can find is that both characters are somehow betraying their race. However, in invisible man I can find that white people betray the ...

### Marketing Management

What ae subway limited target group? Are you asking what the Subway sandwich company targets as its prime customers? Please clarify your question and we'll try to help you. Actually i am totally lost at what i am really looking for. This was suppose to be another person ...

### Macroeconomics

Please, please help me! Make a graph in Excel and explain the following: Holding all other things constant, what would happen to the price of pineapples if the firm increase the available supply. 2. Conversely, what would happen if supply is reduce. Aside from changin the ...

### math word problem PLEASE HELP

Susan uses 15 rolls of ribbon to decorate 10 wedding baskets. Each roll of ribbon is 5 3/8 yards long. After she decorates the baskets, she decides to cut off another 3/4 yard from the ribbon of each basket. Write and simplify an expression to fin out how much ribbon was used ...

### physics

Please help I cant breath with this qn, due today exam pending, thanks for taking your time to help. The human outer ear contains a more-or-less cylindrical cavity called the auditory canal that behaves like a resonant tube to aid in the hearing process. One end terminates at ...

### physics

A physics student throws a softball straight up into the air. The ball was in the air for a total of 6.16 s before it was caught at its original position. (a) What was the initial velocity of the ball? (b) How high did it rise?

### physics

A physics student throws a softball straight up into the air. The ball was in the air for a total of 6.16 s before it was caught at its original position. (a) What was the initial velocity of the ball? (b) How high did it rise?

### physics

physics:the notes at 110Hz has two strings at this pitch. if 1 slips from its normal tension of 600N to 540N what beat frequency would be heard when the two strings are stuck simultaneously?

### physics

physics:the notes at 110Hz has two strings at this pitch. if 1 slips from its normal tension of 600N to 540N what beat frequency would be heard when the two strings are stuck simultaneously?

### physics please help

A rock of mass 5kg is pushed over the edge of a cliff which is 200m high 1.ignore air resistance and calculate the speed of the rock at the bottom of the cliff. In reality air resistance cannot be ignored. The rock eventually reaches terminal velocity of 30m/s 2.calculate the ...

### Social Studies - Please Check my Answer

Please check my answer, I am not sure for this one. In 1784 the British forced American merchants to pay duties on a. trade goods imported from the British West Indies. - (This is my answer.) b. trade goods imported through Canadian ports. c. British goods sold in America. d. ...

### physics! please help!!

A particle rotates counterclockwise in a circle of radius 6.5 m with a constant angular speed of 7.4 rad/s. At t = 0, the particle has an x coordinate of 3.3 m and y > 0 . A) Determine the x coordinate of the particle at t = 0.716 s. Answer in units of m ( I know this ...

### Please tell me if i did this correct

Given the following frequency distribution, find the mean, variance, and standard deviation. Please show all of your work. Errors Frequency 51-53 9 54-56 19 57-59 16 60-62 24 63-65 25 This is what I got: Mean = 59.19 Variance = 1.43 Standard Deviation = 2.05

### chemistry

Treatment with sodium borohydride converts aldosterone A in to an optically inactive alditol. Ruff degradation of A from B, whose alditol is optically inactive. Ruff degradation of B from D - glycerol dehydration. Identify A and B. Please help urgently. Please!!!!!

### Chemistry DRBOB HELP ME PLEASE

Please help me N2O5(g) + H2O(l) --> 2HNO3(l) delta H° = -76.2 kJ H2O(l) --> H2(g) + 1/2O2(g) delta H° = 286.0 kJ 1/2N2(g) + 3/2O2(g) + 1/2H2(g) --> HNO3(l) delta H° = -174.0 kJ Calculate delta H° for the reaction 2N2O5(g) --> 2N2(g) + 5O2(g)

### Chemistry DRBOB HELP ME PLEASE

Please help me N2O5(g) + H2O(l) --> 2HNO3(l) delta H° = -76.2 kJ H2O(l) --> H2(g) + 1/2O2(g) delta H° = 286.0 kJ 1/2N2(g) + 3/2O2(g) + 1/2H2(g) --> HNO3(l) delta H° = -174.0 kJ Calculate delta H° for the reaction 2N2O5(g) --> 2N2(g) + 5O2(g)

### Math - Could Someone Check My Work?

Could someone check my work please? Thank you! (14a^2b)(2ab^2c) = 28a^3b^3c (a^25)^7 = a^125 6x^6 ∙ 6x^6 = 36^12 (2x^2)^3 = 8x^6 (-2)0 = 1 30x^20/(6x^9 = 5x^11 4x^5 ∙ 6x^6 = 24x^11 (2x^4)^3 = 8x^12 -4^2 = -16 -(193)^0 = -1 (-193)0 = 1 (-5)2 = 25 ((6x^7)/(2x^2 ))^2...

### math

Please check my answers! Simplify the product. 7x(x+4) A. 7x^2+4 B. 7x^2+28x <<<< C. 8x+4 D. 8x+11 Simplify the product. 4x (2x^3 - 7x^2 + x) A. 8x^4-28^3+4x^2 <<<<< B. 16x^4-7x^2+4x C. 8x^4-7x^2+x D. 16x^4-3x^3+4x^2 I just started learning about ...

### Math

Elizabeth has 1 7/10 as many as Rosalie has in her garden. If Elizabeth has 51 plants how many plants does Rosalie have in her garden? Please explain step by step on how you answered this and also no links or anything please just a raw answer thanks in advance :).

### s.s (the middle ages) Grade 7

i have 10 words and 11 definitions for them. i have only left 3 words and 4 definitions and tommorow i have a test please help me! Words: manor, pilgrim and vassal definitions: a) a persone who travels to a holy b) lesser nobles c) faithfulness d)an estate owned by a noble ...

### physics

A mover pushes a couch a distance of 4 m to the top of a ramp into the back of a truck using 500 N of force. A) What is the work input of the mover? B) What is the mover’s power if the task takes 10s? C) If the mass of the couch is 100 kg and the back of the truck is 1.5 m ...

### Science: Physics and Chemistry

Can someone please help me with this??? I was given a systems equation. Two masses are on a flat frictionless surface tied together. There is a pulley type thing and another mass is hanging over the edge of the table. It is attatched to the other 2 masses. It has no Fn, only ...

### physics

Two blocks are placed at the ends of a horizontal massless board, as in the drawing. The board is kept from rotating and rests on a support that serves as an axis of rotation. The block on the right has a mass of 5.4 kg. Determine the magnitude of the angular acceleration when...

### physics

REALLY NEED HELP WITH THIS PLEASE. One gram of palladium has 5.66×10^21 atoms, and each palladium atom has 46 electrons. How many electrons are contained in 7.00g of palladium? The elemental charge is1.6×10^−19C. Answer in units of electrons. The answer is 1.82252x10^...

### physics

Approximately 5.5 X10^6 kg of water fall 50m over Niagara Falls each second. a) What is the decrease in the gravitational potential energy of the water-Earth system each second? b) If all this energy could be converted to electrical energy (can’t happen) at what rate would ...

### physics

Approximately 5.5 X10^6 kg of water fall 50m over Niagara Falls each second. a) What is the decrease in the gravitational potential energy of the water-Earth system each second? b) If all this energy could be converted to electrical energy (can’t happen) at what rate would ...

### English

Writeacher, could you please check my post, I need to prepare for tomorrow? Thank you!! Could you please check these phrasal verbs i'm unsure of? thank you. 1) They are cutting off the water/gas supply tomorrow. The chairman cut him out of the discussion. 2) The light went off...

### Algebra/ please help!!!!

WAGE---$ 17.00-an hour---------ANUALLY---28,285.28 APARTMENT VALUE 17.34hrs/pay period towards an apartment value of $934/month----ANUALLY---$11,208----TOTAL-------$39,493.28. My question is: first of all, I get, 17X40= $2,720-not 28,285.28, above. ALSO, I am trying to break ...

### Algebra

If anyone could please just look these over: The given measures are the perimeters of squares. Find (a) the length of a side and (b) the area of the square. Perimeters: 1.) 20 cm 2.) 100mm 3.) 4ft 4.) 2in 5.) 2.8m My answers: 1.) a- 5cm b- 25cm squared 2.) a- 25 mm b- 625mm ...

### Math

Please match each number with its best example. Some values will need to be changed into a decimal format. A. Recurring Decimal B. Mixed Number C. Non-repeating Decimal D. Finite Decimal E. Decimal Examples: ½ 5½ π 0.375 ⅓ I think 5½ is B and ⅓ is A, but I ...

### Math

Please match each number with its best example. Some values will need to be changed into a decimal format. A. Recurring Decimal B. Mixed Number C. Non-repeating Decimal D. Finite Decimal E. Decimal Examples: ½ 5½ π 0.375 ⅓ I think 5½ is B and ⅓ is A, but I ...

### physics please help!!

A moving 2.20kg block collides with a horizontal spring whose spring constant is 419 N/m. The block compresses the spring a maximum distance of 9.00cm from its rest postion. The coefficient of kinetic friction between the block and the horizontal surface is 0.140. a) What is ...

### spanish

can someone please help me with this question, i'm a little unsure "Que hay en la pared de tu sala de clases?" "Hay _____." a. un mapa y un reloj b. un reloj y un capitulo c. un armario y una pagina d. unj mapa y una oficina just explain what the question is asking please. ...

### grade 9 mathimathic optimizing

i am lost completly i don't know what to do. please help me!!!! a farmer is adding a rectangle corral to the side of a barn. the barn will form one side og the rectangle . the farmer has 16 m of fencing to use. conduct an investigation to determine the dimension of the corral ...

### math

Can someone please help me with these problems?Out of 35 problems these are the ones I can not figure out.Please show all of the stepswith no shortcuts. I am sincerely trying to learn this stuff.Thanks 4y-2+y+36=7y+40-5y 5.3x-5.36=4.24-6.7x 6(x+4)=8(x-2) In a triangle ABC, ...

### math

tom takes 3days to do a piece of work while jerry takes only one day for the same. together, they both can finish the job in 15 days. in how many days tom will finish the work? #please give it, the complete solution. please hurry

### Re: PHYSICS

"Relative" is an important word. Block L of mass mL = 1.90 kg and block R of mass mR = 0.500 kg are held in place with a compressed spring between them. When the blocks are released, the spring sends them sliding across a frictionless floor. (The spring has negligible mass and...

### Physics

A U-shaped tube is filled mostly with water, but some vegetable oil has been added to both sides of the U tube. On the right side of the tube, the depth of oil is 5.00 cm . On the left side of the tube, the depth of the oil is 2.30cm . The density of the water is 1x10^3 kg/m^3...

### physics

1. consider a satellite with a period of 8 hours. if the radius of the satellite's orbit is doubled, what is the period for this satellite's. 2.what is the minimum amount of heat ( in joules) needed to heat 5.0kg (5 liters) of liquid water from it frezing point to its boiling ...

### physics

(a) calculate the number of kilocalories needed to climb 232 stair steps (116 steps per minute for 2 min.) *climbing stairs (116/min.) = energy consumption rate is 9.8 (kcal/min) * (b) calculate the gain in gravitational potential energy for a 50-kg person if each step 0.18m ...

### Physics--check answers please

1. Resolve an acceleration vector of 40m/s^2 [25 degrees E of S] into its components For this I got 17 as my x component and 36 as my y component 2. A player is positioned 35m [40 degrees W of S] of the net. He shoots a puoock 25m [E] to a teammate. What second displacement ...

### physics

A 4.74 kg spherical ball with radius 1.4 cm rolls on a track with a loop of radius 39 cm that sits on a table 1.2 meters above the ground. The last 1 meter section of the track is horzontal and is not connected to the rest of the track. 0.33 meters of this section of the track...

### PHYSICS (please help)

Three masses are connected by a string. M1 = 1.0kg M2 = 2.0kg M3 = 3.0kg Mass one and two are on a table while mass three hangs off the edge of the table (there is a pulley). Find the tension in the string connecting m1 and m2. Assume the table is frictionless and the masses ...

### physics

a +35x10^-6 C point charge is placed 32 cm from an identical +32x10^-6 C charge. how much work would be required to move a +50.0x10^-6 C test charge from a point midway between them to a point 12 cm closer to either of the charges? please show work and explain. i still don't ...

### physics

Please see if I am doing this problem right. A mixture of gasoline vapor and air is placed in an engine cylinder. The piston has an area of 7.4 X 10^-3 m^2 and is displaced inward by 7.2 X 10^-2 M. If 9.5 X 10^5 Pa of pressure is placed on the piston, how much work is done ...

### Physics

We can reasonably model a 75 W incandescent light bulb as a sphere 6.0 cm in diameter. Typically, only about 5% of the energy goes to visible light; the rest goes largely to non-visible light infrared radiation. (a) What is the visible light intensity (in W/m^2) at the surface...