# physics please HELP !

129,474 results, page 20

### histroy! please help!!!!!!!!!!!

i am really confused about how to do comparison questions in history! anyone please tell me how!!!!!

### SOMEONE PLEASE ANSWER "8TH GRADE ALGEBRA" QUESTION

Please! It's almost my bedtime!

### math!!! help please?!

what is the probability of not throwing 7 or doubles for 6 consecutives throws with a pair of dice? help please?!?!!

### Trig Proofs

Please Help: please solve this proof: cosx- cosy = -2sin(x+y/2)sin(x-y/2)

### Algebra (please help!)

If y varies directly as x and y is 3 when x is 8, what is the constant of the variation? I don't understand what they are asking and how to solve this. Please help if you can! Thank you so much! :)

### URGENT ALGEBRA

CAN ANYONE PLEASE HELP ME I HAVE NO CLUE WAT TO DO AND I AM SO CONFUSED HELP ANYONE PLEASE 4x-5y=-19 2x+17=y what is the solution of the system?

### Help please

can someone please look at my earlier post on socials, I would like all the help i can get, thank you

### music

Please help.. Can anyone please tell me who was the first author of the lyrics"Five Little Monkeys" Thank You

### Algebra-Please Help!!

What is the solution of x-4 is less than 4 and x + 4 is greater than 7 Please show how you did it so I can look at it and learn how to do them in the future Thanks

### Math(Please help)

Find the real solutions of each equation. 1) 1 / (x+6)^2 = 1 / (x+6) + 12 2) 8x^2/3 - 39x^1/3 - 5 = 0 I have no idea how to do these. Please help!!! Thank you!

### math

please can you help me solve the following equations and please can you show your method. thanks 1) 4x+3/5x-6 = x-1/x-6 2) 4x-5/1-6x = x+10/x-6 thanks once again

### 8th grade

5[6-2(5-3>to the zero power)] Please help so confused answer = -20 or 100 idk please help !

### marketing

can you help me please to differentitae this follows... 1.synthetic vs. fabricating process what does it mean please i need your help

### grade 9 math

Can someone please help me solve this equation. And please explain how to break this down. 4b-6+b-9= 0

### Calculus help me please!

Find the value of k so that f(x)= {3x^2+kx+4 if x<0 and 2sqrt(x+4) if x >or equal to 0} is differentiable at x=0 can someone please provide help!!!

### prealgebra

how do you solve this problem and can you help me please: wholesale price: $13 and markup percent: 110% can u help please

### Algebra I

What is a set notation? Please explain what it is and give examples as well please. It would help a lot. Thank you.

### logic

Can u please give me 2 own examples of contrariety,subcontrariety,subalternation,and,contradiction?PLEASE.

### algebra2 PLEASE

what are three important thing for an evaluating and inequalities and abs. values please and thank you

### college algebra, Please help!!

solve the following equation 9^x-1 = 144(6x) please show work.

### calculus please help

lim y→−1 (sqrt(y^2+8)-3)/y+3 find limit if it exists please help

### calculus-can someone please help me with this ques

find the rate of change of f(x)=x^2+4 a. from -2 to 0 b. from 1 to 3 c. from -2 to 1 please show work

### please help me please!!! Math

Find a6 for an arithmetic sequence where a1=3x+1 and d=2x+6 . I can't even solve it because I do not have any idea.

### Chemistry Help Please

Which of the following is the strongest reducing agent? a) Li+ b) Zn c) Sn d) H2 Is it Li? Can someone please explain what the answer is and why?

### Calculus Help Please!!!

if f(x)= x+(1/x), find f'(x) using the limit definition of derivative. Please show steps!!! Thank you!!!

### math

Please help me with this one, I am stymied! ; Does weight + height affect force? Please explain!

### math/help please

Question: Kenny reads 5/8 page in 2/3 minutes. This is unit rates. Please help!

### Algebra 1

Please list five numbers that have 3, 5, and 7 as prime factors. Please help answer thanks

### integral Calculus

ʃ (x4 + 6x3 – x2 + 2)dx I really need it for practicing this subject...please please help

### history

How is Mary McLeod Bethune a hero?Please no links and please at least 8-10 sentences.

### FINANCE

hi! could someone give me a well known company with direct and indirect competitors ( at least 3) please!! please help me <3

### Please Help

Please help I have to do something but do not get what these words mean. Post heart rate Duration

### math

Multiply 2/3 and 6/7 A. 4/7 B. 4/21 C. 12/21 D. 3/7 PLEASE HELP if you could please tell me all the answers for this mixed numbers practice if u know them

### Science Help Please

Giants and dwarfs are believed to be _________ stars. a) old b) young Please help!

### algebra

could someone please check these roblems for me and if they are not rightWOULD YOU PLEASE HELP E WITH THE CORRECT ONES THANKS!!! 1. Slove for X, wher X is the real number, square root 5x + 9= square root 9x + 13= 27 2. Find the value: ^3 square root -27= 9 3. Write the ...

### Chemistry URGENT PLEASE PLEASE PLEASE HELP!

Determine whether the solution is basic, acidic, or neutral. Write net ionic equations to show how it behaves in aqueous solutions. 1) Fe2(SO4)3 I know it is acidic Do I do hydrolysis equations for the net ionic or do I do redox reactions?

### Physics

Please help me with the following problem: Joe is on a cross-country trip from New York to Los Angeles. He drives for 45.0 min at 70.0 km/h, 10.0 min at 95 km/h, and 30.0 min at 55.0 km/h, and he spends 20.0 min eating lunch and buying gas. What is the average speed for this ...

### speech

Can you please help me out with a speech? I'm in 10th grade at High School and we're doing speeches soon. I'm not lazy and trying to get someone to write a speech for me but I seriously suck at speeches and have no idea what to write or talk about. Can you please write me a ...

### Physics

A particle of mass m0 is given a kinetic energy equal to one-third its rest-mass energy. How fast must the particle be traveling? please include units

### physics

Hi! could anyone please help me with this problem. Thank you so much. Q: The critical angle for total internal reflection for ice surrounded by air is 49.8°. Calculate the Brewster angle for ice if the light is incident from the air.

### college physics,electric potential

Four point charges, each with Q = 7.2 µC, are arranged at the corners of a square of edge length 3.6 m. What is the electric potential at the center of the square? V? Please show me how to solve this.Thanks

### SCIENCE(PHYSICS)

A train travels 40 km/hr for 0.2 hr, 50km/hr for next 0.2hr and 60km/hr for next 0.4 hr.calculate the average speed of train. PLEASE SOLVE THE QUESTION WITH ANSWER AS I WAS NOT ABLE TO GET THE ANSWER

### Physics Need Help PLEASE

Two point charges are separated by 8 cm. The attractive force between them is 14 N. If the two charges attracting each other have equal magnitude, what is the magnitude of each charge?

### Physics

What is the speed of the wave represented by y(x, t) = A sin(kx − ωt),where k = 7.0 rad/cm and ω = 3.6 rad/s? answer should be in cm/s I tried to subtract 7-3.6= 3.4 which is wrong and I also divided 7/3.6=1.94 , but that is wrong too. I don't know how to do ...

### physics ..PLEASE HELP ASSIGN DUE SOON :(

A jet airplane has an intensity of 97.7W/ m^2 when heard at a distance of 30.0m. What is the maximum sound intensity heard by a person on the ground when the airplane is 10100m overhead?

### Physics

In the circuit shown, find the voltage Vx (in Volts) if V = 17.0 Volts, R1 = 13.0 k ohms, R2 = 4.0 k ohms, R3 = 13.0 k ohms and R4 = 21.0 k ohms. Answer is -6.5 I don't understand how they got it, can someone please explain it with steps? Thanks tinypic. c o m/r/2pzhcpl/8

### physics

In the circuit shown, find the voltage Vx (in Volts) if V = 17.0 Volts, R1 = 13.0 k ohms, R2 = 4.0 k ohms, R3 = 13.0 k ohms and R4 = 21.0 k ohms. Answer is -6.5 I don't understand how they got it, can someone please explain it with steps? Thanks tinypic. c o m/r/2pzhcpl/8

### Physics

Intensity of 4Mhz in 1.54mm = 2W/cm2 at 4cm intensity =? I know the answer is 0.32, but I do not understand why. Can you please explain? I did figure out that Attenuation= 8db. 4/2 x 4cm = 8db. Thank you in advance. I appreciate it!

### Physics

Help with this please. No idea. Except for a 22.00 min. rest stop, Emily drives with a constant velocity of 89.5 km/hr north. How long does the trip take if Emily's average velocity is 77.8 km/hr north?

### college physics

This site is just a front for liveperson Most college physics questions are not answered for months if ever. Out of "200 experts" you must have somebody who knows physics right? Guess not.

### PHYSICS HELP

Draw an arrow in the box that shows the direction of the force. Please help. I want to be sure. W > 0 W = 0 W < 0 ___ ____ ____ ___ ____ ____ d-> d-> d->

### physics b

If heat Q is required to increase the temperature of a metal object from 4°C to 6°C, the amount of heat necessary to increase its temperature from 6°C to 12°C is A Q B 2 Q C 3 Q D 4Q please help me asap

### Physics please help !

A Goodyear blimp typically contains 4770 m3 of helium (He) at an absolute pressure of 1.10 x 105 Pa. The temperature of the helium is 274 K. What is the mass (in kg) of the helium in the blimp? You asked this twice. See my response to your later post.

### physics

please someone give me a hand at this problem. . . Describe the Bohr model of the atom. What is Bohr’s key idea (involving matter waves) that makes the Bohr atom have discrete energy levels?

### physics

please check my answer An electron moves north at a velocity of 9.8 * 10^4 m/s and has a magnetic force of 5.6 * 10^-18 N west exerted on it. If the magnetic field points upward, what is the magnitude of the magnetic field? F=BqV F= 5.6 * 10^-18N q= 16 * 10^-19C V= 9.8 * 10^4 ...

### help with physics please!

2.50 kg particle (the function U(x) has the form bx2 and the vertical axis scale is set by Us = 2.0 J).(a) If the particle passes through the equilibrium position with a velocity of 55.0 cm/s, will it be turned back before it reaches x = 18.0 cm?(b) If yes, at what position (...

### college physics

A 12100 kg railroad car travels alone on a level frictionless track with a constant speed of 20.5 m/s. A 5850 kg load, initially at rest, is dropped onto the car. What will be the car's new speed? Please help!

### Physics

A point (labelled P in the figure) is attached to the rim of a disk of radius 0.2 m, which can turn around an axis through its center. It is rotating counterclockwise with a speed of 2.5 m/s. Can someone please step me through the problem step by step?

### physics

Find the final velocity of the two balls if the ball with velocity v2i = -19.5 cm/s has a mass equal to half that of the ball with initial velocity v1i = +26.8 cm/s. PLEASE HELP!! i have tried so many different ways and can't seem to get the answer

### physics (please help!)

A projectile of mass 0.539 kg is shot from a cannon. The end of the cannon’s barrel is at height 6.4 m, as shown in the figure. The initial velocity of the projectile is 9 m/s . How long does it take the projectile to hit the ground? Answer in units of s

### Physics(Please help)

A skier slides horizontally along the snow for a distance of 11.9 m before coming to rest. The coefficient of kinetic friction between the skier and the snow is 0.0458. Initially, how fast was the skier going? I do not know how to start this. Thank you.

### Physics - PLEASE HELP

A 25-kg uniform ladder 10-m is leaning against a frictionless wall. The ladder is making an angle of 32° to the ground. What is the magnitude of the total force exerted on the ladder by the ground? 675 N 462 N 245 N 543 N 314 N

### Physics

A particle travels along the x axis with a constant acceleration of +2.7 m/s2. At a time 4.2s following its start, it is at x = -108 m. At a time 5.7 s later it has a velocity of +13.0 m/s. Find its position at this later time. Please use kinematic equations to solve.

### Physics

A 1550 kg car is traveling with a speed of 12.4 m/s. What is the magnitude of the horizontal net force that is required to bring the car to a halt in a distance of 50.3 m? I found the force of the car to be 14700 by using F=ma. I am confused on what to do with the rest of the ...

### Physics

A rock is thrown straight up at 22.0 m/s from a roof of a 30.0 m tall building. After rising, the rock falls on the street below. Ignoring air resistance, how much time is the rock in the air? Show the work please :)

### physics

In a physics lab, students are asked to predict how the acceleration of the block sliding up a ramp compares to the acceleration down the ramp compares to the acceleration down the ramp. The block slides up a somewhat rough surface inclined at an angle of theta above the ...

### AP Physics

can you please explain this to me... Were given this eqaution x = At^2 + B were A = 2.10 m/s^2 B = 2.80 m ok and this is an example problem and it's wlking us through it find the instantaneous velocity at t=t2=5.00s equlas the slope of the tangent to the curve at point P2 ...

### math help please

(-3)^3-(-8)(-2)= -3 to the 3 power is -27 subtract -27 - -8 = -19 multiply by -2 =38 is this right please help (-3)^3-(-8)(-2) Use BODMAS rule So the answer is (-3)^3-16 ==>-27-16 =-43

### Math please help me

add the fractions 1/3, 5/6, and 3/8 reduce your answer to lowest terms please show your work thanks for the help

### trigonometry

Please solve this equation. As you write down the steps, please give me a description on what you did. y^3 - 16y^1/2 + 64 = 0

### Trig.

Please solve this equation. As you write down the steps, please give me a description on what you did. y^3 - 16y^3/2 + 64 = 0

### Language Arts PLEASE HELP

How do you do a word cited page? please help me so confused. Paper due tomorrow. Thank you

### math

PLEASE EXPLAIN HOW I CAN SOLVE MIXED NUMBERS PLEASE GIVE ME A EXAMPLE FOR PARTS THAT ARE SHADED THANKS

### Math -please check me

what is the perimeter of a rectangle if the length is 5/9 cm and the width is 2/9 cm? a. 5/9 cm b. 1 5/9cm c. 7/9 cm d. 1 7/9 cm the answer I got was 14/9 please help me.

### algebra

For the following please find (f o g)(x) and (g o f)(x). Also please report any shifts or changes in amplitude f(x) = cos(x), g(x) = 2x + 6

### English

Can you please tell me what a teen's life was like durin WWII? Please include sources

### algebra

i don't know how to do this with the fractions. can you please please help? simplify the expression and combine like terms. 2n^2+4m n^2-m _______ + ______ 3 3

### Algebra

Can someone please tell me what the domain of the following equation is? Please explain how you got that answer. g(x)=5^x

### Social psychology

Please help me define: maladaptive and adaptive. I've try googling it and unable to find please help. Thanks

### science

PLease someone help me!!! What are some of the names of acids and alkalis that are in shampoo!!! PLEASE HELP MEEEEEEEEEEE!!! thank youuuuuuuuuuuu!!!

### algebra

can someone please check my answer for me? 6-2x=6x-10x+14 I got x=-2 is this correct? if not please let me know which step I missed.. thank you

### Algebra 1

Formulas: Please solve the equation for x. y=2/3x+8 2/3 is a fraction. PLEASE SHOW YOUR WORK I REALLY NEED HELP.

### Algebra 2 honours

can someone please tell me how to factor out (x^6+1)^4? please show me how you got the answer... Thank You... :D

### Socials-Please Help

Can someone please go over my posts quickly, I was waiting for a response since yesterday:-(

### math

Please help me answer this.. Suppose that 2^(x/2)= p 3^(x/3-1)= q [5^(x/2)]/3 = r Express (0.48)^x in terms of p, q and/ or r. this question came from our reviewer.. please and thank you!

### PLEASE HELP - english

If something has a higher surface area what does that mean? can it me said that it is more thicker? please and thank you

### Geometry Please Help

/Users/szeringue/Desktop/SCAN0001.JPG Can you help me solve this problem, Please AB=27 BC=x CD=4/3x AD=x AC=? How do I get what AC equals?

### Geometry Please Help

/Users/szeringue/Desktop/SCAN0001.JPG Can you help me solve this problem, Please AB=27 BC=x CD=4/3x AD=x AC=? How do I get what AC equals?

### PHL/323

WHAT ARE SOME BLURBS FOR SCOTTS PAPER COMPANY? PLEASE PLEASE HELP IM ALMOST DONE AND THIS IS CONFUSING ME

### Please help!

Find the volume of 0.110 M hydrochloric acid necessary to react completely with 1.54 Al(OH)3. Please explain how to do this.

### Math

I SERIOUSLY need help! Solve the linear system by using substitution. x=6-4y 2x-3y=1 Explanation too, please! Please and thanks!

### combine functions.. please help.

Given: f(x)=2x^2-x+1 g(x)=2 sin x h(x)=3^x Determine: a) f(g(x)) b) (h^-1 o f)(x) c) g(f(h(x)))) Please show steps, thank you very much.

### chemistry

calculate the volume occupied by 10^22 molecules of a gas 300 k and 760 mm pressure. please help me please...................

### math (algerba 1) Please help!

x+y=0 3x+y=-4 Sovle each system of equation by graphing. If got the answer (-3,3), but it's not there. Please explain!

### Algebra

Please help me. Please show work. What are the domain and range of the function y=2 square root 3x + 4-5? *A.) X >/= -4/3; Y >/=-5 B.) X >/= 4/3; Y >/= 5 C.) X </= -4/3; Y </= -5 D.) X </= 4/3; Y </= 5 Thank You so much.

### CONFUSING QUESTION PLEASE HELP

Which of the following is the strongest reducing agent? a) Li+ b) Zn c) Sn d) H2 Is it Li? Can someone please explain what the answer is and why?

### algebra1 HELP PLEASE

find the value of x and y that make each equation true -4+(y)^i=-12x-i+8 please show the steps thanks

### Math

how do you write radicals as powers? please help me with the following question, I know the answer but I don't know HOW to get it. I must learn this so please help me. ãy 5/3

### alGEBRA 2 help please would appreciate

graph 36x^2-900=25y^2 show the step please