physics please HELP !

127,101 results, page 23

math please HELP!!!

please help!! what is 6 times the sum of 13 and a number? 6(13+ N)

Math 3 PLease Help

*Please solve the rational expression. x^2/x-4 - 7/x-4=0

ms.sue please answer the trigonomitry question

please

Health-Please Help!!

Hi!! What is Night Eating Syndrome? Please Help!! Thank You!!

Algebra

Help please....Please Simplify (-3a^-5 b^6)^4 (a^7b^0)^3 any ideas? thanks in advance!

Science

What is the life cycle of the pohutukawa? Please please help.

Algebra 1A

Help Please! multiply 5/7(-35)= 0 is this correct? if not will you show me please? thanks

Math

PLEASE HELP!!!NEED TO SOLVE: 5-(3)<10(-3)= 3<2x+1<9= 13<3x+5<29= 12<-4y+8<16= 5>x+2>-7= 5<2-x<7= PLEASE HELP DUE A.S.A.P. THANK YOU.

ms sue can you please look at my previous post

please help

Algebra Help please

12(74y - (6+5Y - 8Z) = Please show work

CALCULUS:)

Please help me... and show steps please :) integral from 0 to 1 of (e^x+1)/(e^x +x) dx

Word meaning please

what is Hemophilia? please explain thanks

english

Please could you help me with 6 words with silent letters ...please

Math

2y/3+27+3y/4=-24 Please help me solve and show your work please and thank you

Math

3k/4-28-2k/3=37 Please help me solve and show your work please and thank you

Math

1/2(6x-4)=4x-9 Please help me solve this and show your work please and thank you

Math

k/5+3/20<3/10 Please help me solve this and show your work please and thank you

Math; PLEASE HELP

Solve for x. Provide an explanation, please. -X^2+36=0

Math

Please use systemic division. (x^4-6x^2+3x-1) / (x-2) please help thank you

Math

What is the integral of dx/(x^3-9x)? Please post steps too please!

science... PLEASE HELP!

Please describe a constant in an experiment.

math

2x+8=3x+2 Can you please help me solve this one problem please

please help

i posted at 12:00 about math... please help for my son.

Math, HELP PLEASE!

is the sequence 2,3,5,8,12 geometric? please explain why

math

Please help me to answer.this with solution i need your help please! Thanks! 1) 5/18+2/9= 2) 3 (12/17)= 3) (2/7)÷(5/8)= 4) 3/7-5/9= 5) 12÷2/3= 6) 7/15÷2/3= 7) 3/5-10= 8) 4/15+7/9= 9) 12/21(-3)= 10) (2/5)(5/18)=

mat115

Please help with this math problem. The math question asks, "Identify the numerator and denominator of the fraction 3/8. Please let me know if I am correct? numerator is the 3 and te denominator is the 8. Is this a trick question? My professor want me to show my work, so this ...

math(check answers please)

Can you please help me with writing fraction as decimal because im clueless with it! ------------------------- write the fraction as a decimal.28/15 A. 1.6 B. 1.86 C. 2.86 D. 28.15 ------------------------- Write an equivalent expression for 4g+2 using distributive property. A...

Please Help with Physics Problems???????

A 0.60 kg ladle sliding on a horizontal frictionless surface is attached to one end of a horizontal spring (k = 430 N/m) whose other end is fixed. The ladle has a kinetic energy of 8.6 J as it passes through its equilibrium position (the point at which the spring force is zero...

physics

An athlete executing a long jumper leaves the ground at a 27.0 degree angle and travels 7.89 m. What was the takeoff speed? If this speed were increased by just 5.0%, how much longer would the jump be? I came up with a take off speed of 27.4 but the system is saying that is ...

Physics

1. A person driving to the right and honks their horn. An observer standing behind the car, opposite its direction of motion would hear...(choose one) a. Higher Pitch b. Lower Pitch c. Same pitch as the driver please explain how you got to the answer

Physics

Sketch the velocity vs. time graph for an object that: • from 0 to 2 seconds has moved with constant velocity of 3 m/s • from 2 to 5 seconds was at rest • from 5 to 10 seconds increased its velocity, reaching 5 m/s at t =10 s. Could you please help in describing what ...

Physics

What is the thinnest film of a coating with n=1.42 on glass n=1.52 for which destructive interference of the red component (650 nm) of an incident white light beam in air can take place by reflection? I am confused on the n's and I have no idea what equation to use, it seems ...

AP Physics

A skier is accelerating down a 30.0° hill at a = 2.60m/s/s. (a) What is the vertical component of her acceleration? (b) How long will it take her to reach the bottom of the hill, assuming she starts from rest and accelerates uniformly, if the elevation change is 360 m? I get ...

Physics

Sorry new here trying to figure out angular problem with a disc, only have 2 attempts remaining please help me out :D. When the play button is pressed, a CD accelerates uniformly from rest to 470rev/min in 3.0 revolutions. If the CD has a radius of 6.0 cm and a mass of 15 g , ...

physics

Water (η = 1.00E-3 Pa·s) is flowing through a horizontal pipe with a volume flow rate of 0.0153 m3/s. As the drawing below shows, there are two vertical tubes that project from the pipe. Assume that H = 0.0477 m and L = 0.670 m I know how to plug in everything but, my ...

physics

On a cold winter day when the temperature is -20 degrees celsius, what is the amount of heat needed to warm internal body temp(37) the .5 L of air exchanged with each breath? Specific heat of air is 1020 J/(kg K) and that 1.0L air has a mass of 1.3g. Please help!! I don't know...

Physics

if a ball is thrown vertically into the air, leaving the ground at a height of 1.8m, with a speed of 9.7m s -1. When it rises and falls to the ground what will the balls speed be as it hits the ground? please help with an explanation as i am so stuck, my exam is in two days ...

physics

A weight of 30.0 N is suspended from a spring that has a force constant of 180 N/m. The system is undamped and is subjected to a harmonic driving force of frequency 11.0 Hz, resulting in a forced-motion amplitude of 5.00 cm. Determine the maximum value of the driving force. ...

Physics please help!!

A 1.94 kg solid sphere (radius = 0.105 m) is released from rest at the top of a ramp and allowed to roll without slipping. The ramp is 0.710 m high and 5.17 m long. When the sphere reaches the bottom of the ramp, what is its total kinetic energy?

physics

a body thrown vertically upward returns to the earth in 3sec what was the initial velocity of the body? what height did the body reach? neglect the resistance of air. The answer after solving is 14.7m/s and 11m. please tell me how the answer is arrived.

Physics

A football player throws a ball with a horizontal distance of 31.0 m so that the other player catches it at the exact height it was initially thrown. If the ball rises and falls by 1.8 m in its trajectory, what is the initial velocity of the ball? Please give the speed and angle!

physics please!

hi im trying to do a problem that involves multiple battereis, one capacitor,and multiple resistors, and im told that the circuit has been connected for a very long time... i found the current passing through each battery using kirchoffs rules, but now i have to find the ...

Earth Science - Please Check My Answer

Please help with the following: Dani wants to measure the volume of a pebble. Which tool will give the most accurate measurement? A. a ruler B. a tablespoon C. a measuring cup D. a graduated cylinder I think the answer is mostly D. Is this correct? Please help me by checking ...

Physics- Newton's 1st and 2nd Law

Please help me :( Briefly explain the following scenario's using Newton's first law. a) Trevor wants to tow Kevin's car with his truck. He attached a small tow rope between the vehicles and leaves the rope slack (loose). Trevor quickly accelerates forwards making the rope ...

Math Help Please

Please show me how to put this in interval notation. Thanks! I know I solved this right, I think, but need to put it in interval notatioin. Please tell me if i am correct. Thanks! PleaseSolve: (x-3)/(x^2-25)<0 and write solution set in interval notation. This is what I get...

Physics Help Please!!!! Graphs Please Please!!!

------A part is on an assembly line going between one station and another. if the part has a constant velocity ( and constant acceleration) , complete a sketch of the following two corresponding graphs. do not worry about numbers, but only the shape of the graphs. 1) Graph of ...

cicivs

does hawaii have waterways? If yes, please name the waterways of hawaii and how it can help to shape the lives of people living in Hawaii. Please somebody help me because I looked all over my online civics book and i did research on waterways of Hawaii and I still cant even ...

physics

Four charges −8 × 10^−9 C at (0 m, 0 m), −7 × 10^−9 C at (5 m, 1 m), −1 × 10^−9 C at (−2 m, −3 m), and 2 × 10^−9 C at (−2 m, 4 m), are arranged in the (x, y) plane as shown. Find the magnitude of the resulting ...

Distributive property

How would I multiply these expression? 6(h-4) -3(x+8) -10(-a+5) PLease and thank-You Multiply the coefficient (outside the parentheses) by each term inside the parentheses. For example, 6(h-4) = 6h - 24 You do the others do you have 5th grade distributive property jiskha ...

Physics

A balloon appears to be yellow when seen in white light. Explain the colour it will appear in a) green light and b) magenta light. I really don't undestand the subtractive theory of light, and it applies to this question. Can you please explain to me how to get the answer? Thanks

Physics

Four uniform spheres, with masses mA = 37 kg, mB = 30 kg, mC = 220 kg, and mD = 55 kg, have (x, y) coordinates of (0, 50 cm), (0, 0), (-77 cm, 0), and (44 cm, 0), respectively. Find the net force on sphere B due to the other spheres. What are the (a)x and (b)y components of ...

Physics. PLEASE HELP!!

A 1.2 m diameter wagon wheel consists of a thin rim having a mass of 11 kg and six spokes, each with a mass of 1.1 kg. Find the moment of inertia of the wagon wheel for rotation about its axis. Answer in units of kg · m2

Physics

The period of oscillation of a spring-and-mass system is 0.60 s and the amplitude is 4.1 cm. What is the magnitude of the acceleration at the point of maximum extension of the spring? I have too many unknowns to use the equation for frequency, period, acceleration, velocity. ...

Physics

A pendulum clock is accurate on earth, where the period of its pendulum is 1.00 s. (a) Find its period on the moon, where gravitational acceleration is 1.6 m/s2. (b) During a 2 h interval, what would be the elapsed time shown on the clock? CAN YOU PLEASE PROVIDE AN ANSWER WITH...

physics

please help:- Two capactiors of 14microfarror and 6 microfarror are connected in parallel with a series 10microfarror capacitor across a 100v dc supply a)total capactiance b)charge on each capacitor c)voltage across each capacitor d) energy stored in each capacitor

Physics (vectors)

Please help me with this question. I have a triangle that is not a right triangle with sides A, B, and C.(no values).The arrow's heads of A and B are joined and the arrow's head of C is in the tail of B. How do you find the resultant, the vector equation, and the direction of ...

physics forces/kinematic

What does it mean that 1) A body can have zero acceleration but still in motion. 2) A body can have zero velocity but it's also accelerating. I don't really understand this two points, please explain it to me, thks!

Chemistry - HELP IGCSE

I have a chemistry exam tomorrow and I don't get the double bonding in covalent bonding I tried many websites , textbooks and other books and yet nothing worked Can someone please explain it clearely and in a simple way and please don't put any links for websites ca use ...

Physics help please

An oscillator with a mass of 281 g has a speed of 119.1 cm/s when its displacement is 2.80 cm and 34.2 cm/s when its displacement is 7.80 cm. What is the oscillator's maximum speed (in m/s)?

Physics

Hey, I'm studying for my physics class, and I'm not sure how to solve this problem. Can someone walk me through it please? I'd really appreciate any help! John throws a baseball from the edge of a cliff with an initial velocity of 17.0 m/s at an angle 27.0° above the ...

Physics

A youngster shoots a bottle cap up a 15.0° inclined board at 1.92 m/s. The cap slides in a straight line, slowing to 0.95 m/s after traveling some distance. If the coefficient of kinetic friction is 0.35, find that distance. Can someone please show me the steps to solving ...

physics

The nucleus of a copper atom contains 29 protons and has a radius of 4.8*10^-15m. How much work (in electron volts) is done by the electric force as a proton is brought from infinity, where it is at rest, to the "surface" of a copper nucleus? I really got no clue to do it. Can...

Physics

In a refrigerator, I know there is a liquid called refrigerant circulates through coils within the refrigerator to absorb heat from the interior. But what would happen if too much refrigerant was present in the system? Too less? Please use phase changes to explain your answers...

physics

anyone who knows the answer to this question please show your work. drwls i know i posted this queestion before but you didn't reply to my comment. Your friend has climbed a tree to a height of 6.00 m. You throw a ball vertically up to her and it is traveling at 5.00 m/s when ...

Physics (please help!!!!)

A man of mass 80 kg and density 970 kg/m3 stands in a shallow pool with 31% of the volume of his body below water. Calculate the normal force the bottom of the pool exerts on his feet. (Take the positive direction to be up. Indicate the direction with the sign of your answer.)

Physics please help

A student doing Young's experiment measures a distance of 6.0 cm between the first and seventh nodal points on a screen located 3.0 m from the slit plate. a) if the slit seperation is 220 x10 to the -6, what is the wave length of light being used ? b) what colour is the light ?

physics

Only two forces act on an object (mass = 4.00 kg), as in the drawing. Find the magnitude and direction (relative to the x axis) of the acceleration of the object. Ftotal=Sqrt(60^2+40^2)=72.11(N) Angle=tan-1(60/40)= 56.3° (How did you get 56.3°) a= F/m=72.11/4=18(m/s/s) The ...

Physics

You will use the formula p*V = kB*N*T to find the depth of the box (front to back measurement). The volume of the box is given by the formula V = W * H * D. (You will need to convert the pressure from atm to Pa, or pascals, by multiplying atms by 1 * 105.) The height of the ...

Physics (please help!!!!)

A skydiver is subject to two forces: gravity and air resistance. Falling vertically, she reaches a constant terminal speed at some time after jumping from the plane. Since she is moving at a constant velocity from that time until her chute opens, we conclude from the work ...

CALCULUS

Please help.. ʃ (4sin²x cos²×/sin 2x cos 2x)dx That's integration of (4sin^2x cos^2x over sin 2x cos 2x) dx i've got it from the back and it has an answer from the back page of the book but i want to know how to solve it..i really need it for practicing this subject......

Physics- drwls please help

(a) Calculate the kinetic energy that the earth has because of its rotation about its own axis. Assume that the earth is a uniform sphere and that its path around the sun is circular. For comparison, the total energy used in the United States in one year is about 9.33 109 J. (...

DIVIDING POLYNOMIALS! PLEASE HELP!

Okay I'm DESPERATE. Can somebody please tell me what n^3-64 divided by n-4 is? And for x/x+2 - 4/x-2 - 1 is the answer 2(-3x+2)/(x-2)(x+2) see above. helpppppppppppppp me i am failing your fat

Ms. Sue,this is for you--please read

Would you please look on page 2,under Cultural Diversity and help me with the question I had asked earlier? Thanks!

SCIENCE

wat are 2 ways newtons 3 laws of motion apply in volleyball!!! please help i looked everywhere!!! please I NEED THIS BY TOMORROW!!!!!!! thank you

SOCIAL STUDIES

How large was Alexander's kingdom in Macedonia? What distance? Please give a number using miles or kilometers please!?

PLEASE HELP- spelling

10 places, 10 foods, 10 animals, 10 things, 10 people, and 10 games with double letters PLEAse!!! I don't have much time

algebra 2

If x^2-x-1 divides ax^6+bx^5+1 evenly, find the sum of a and b. Show all steps and exlain your answer. Please, please help me out!! Thanks alot. =)

math

oh, please help me post a linear programming questiion with solution(graphical)please i need it nao..and i cant find it on the internet thx

Economucs

Will someone please explain me the self-regulating nature of a marketplace? I read my text but it made me more confused...so please help!!!

math

I have no idea how to do these please help(: evaluate each of the following 1. 81^-1/4 (81 to the negative power of one fourth) 2. 125^2/3 3. 64^-3/2 4. 4^3/2 answers and work please

math

I have no idea how to do these please help(: evaluate each of the following 1. 81^-1/4 (81 to the negative power of one fourth) 2. 125^2/3 3. 64^-3/2 4. 4^3/2 answers and work please

Algebra

Please help me I have been trying to get the answer and for some reason is not coming up correct can someone please help. evaluate the polynomial for x=1 3x^2-4x+6

English

(telephone call) Hello. May I speak to Tony? 1. - Who's calling, please? 2. - Who's speaking, please? (Which one do we have to use? Are both OK?)

math

Factor completley 12r^2 +36rf +27f^2 5x^5-20x^4+30x^3 Can anyone please help me with these two problems. I have to get them done and do not understand them. Please help me.

math

x.y=30 and x+y=10.3 ,what is x & Y. final answer is x=5.15+1.86i and y=5.15-186i, this way is by try and error (logic). but can somebody please show me how you do it by aljebra, please, thank you.

sci245

hi. please help. i need to do a presentation for weathering and erosion and i am not sure what the graphical representation means. does this mean photos or graphs? please help.

algebra 1

can some one please help me with this equation using the addition principle -9/5 + x = -2/9 Please explain how you got your answer in all phases. Thanks

calculus

please help! Find an equation of the tangent line to the curve at the point (-1, 1). y = 5x3 - 6x. y=? ...............i keep getting y=x+2 and its wrong. can someone please help?

Algebra Please Help

I have been out of school for a long time and not understanding these questions. Please help why is 5^0=1 can you explain when (-3)^n is positive and when it is negative.

Math-PLEASE. HELP.

Given that y varies directly with x, write a direct variation equation that relates x and y. x=1/3 <---(fraction), y=2 **Provide an explanation as well, please.

chemistry

Could someone please tell me how to solve this problem: A pressure of 25.7 inHg would be how many kilopascals? Could you please list the steps on solving it. Thanks

Math Help Please

Would someone please be kind enough to explain steps for this one. Thank you. If m and n are positive integers and m is 250% of n, what percent of m is 2n?

Please can you help me (Probability)

Whether multiplying the same number to each value in the data set will affect its variance, please can you gave me an example. Thank you for your help.

geometry

show that (-3, 1) and (3, -1) and (1, 3) are the vertices of an isosceles triangle. find its area. please include explanation. this is really frustrating please help. thanks alot! :)

math

approximately how many times as much money does the smith family spend on miscellaneous item as it spends on utilities? 1] 4 2] 5 3] 9 4] 15 5] 50 please help me please

algebra 2

check my answer please find the number of zeros(x-intercepts) y=3k^3-6k^2-45k=k(3k+9)(k-5)= k(3k^2-15k+9k-45)=k(3k^2-6k-45) or should i do it 3k(k-5) (k+3)=3k(k^2+3k-5k-15)=3k(k^2-2k-15) which on is the right one please let me know.thanks

Geometry

URGENT PLEASE HELP please help me understand how to draw a net, am i supposed to memorize these or is there a method for drawing nets for different shapes.

science

Ecological ________ - normal, gradual changes that occur in the types of species that live in an area. Help please and help me fast please!!!!!

Math

Can I please get help on the questions for 'What do you get if a bunch of bad guys fall in the ocean?' on page E-53? Please help, been on this for about 3 hours already!

Literary terms

PLEASE HELP!!!!!! Please give examples for the following: 1. Satire 2. Parody 3. Pathos 4. Bathos 5. Rhetoric 6. Logos 7. Ethos

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