physics please HELP !

126,957 results, page 40

physics PLEASE help

A 5.0-kg block is at rest on a horizontal floor. If you push horizontally on the 5.0-kg block with a force of 10.0 N, it just starts to move. (a) What is the coefficient of static friction? (b) A 12.0-kg block is stacked on top of the 5.0-kg block. What is the magnitude F of ...

physics please help!!

A diver stands on the end of a diving board as shown in the figure on the right. The mass of the diver is 58 kg and the mass of the uniform diving board is 35 kg. Calculate the magnitudes and directions of the forces exerted on the board at the points A and B. (A & B are 1 ...

Physics

is physics neccessary for becoming a pharmacist or no? i searched the web and it says yes. so is it true?

physics

do you know where I can get a formula sheet for physics our book does not include a break down of them

physics

what are imp. long questions of 7th chapter of 9 e.m of physics of bise lahore.

Physics

a 12 kg physics book flies through the air with a momentum of 20kg m/s. what is its speed?

physics

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

physics

explain the physics principle why the size of tree stem decreases upwards?

Physics

Please check my answers: Why does a brick weigh 1 kilogram. Explain. -Is it because the matter in the brick is the gravitational pull between the brick and the earth? When one water drop falls from a facet, and then a few minutes later another drop. How will the drop come out...

Trigonometry Urgent!

I am writing a paper on the 8 trigonometric identites but can't find any information on them. Please does anyone know of any websites that would have things like their history, development, applications in ancient times, origins, etc. Please help. Urgent!!!!

chem

for 2Al2O3----> 4Al(s) + 3O2 the question is what is the heat change for the formation of 1 mol of aluminum oxide from its elements? Al2O3:-1676.0 O2:0.0 Can someone please explain how to complete this problem step by step please??

Computer Science

Help me please! I need help with Floating Point Notation when converting biary and regular numbers! Please. I just need some help and would appreciate it greatly. Also instant message me at TRbal10. Thank you

Pre Algebra

Please help! This is due tomorrow... I don't understand how "Counting Outcomes and Theoretical Probability" works! There's a question that says: You toss two coins. Find P (one head and one tail). Please help!

grade 12 english

please explain...metaphors compare two things...example "gathering clouds" and "raging storms" ...am I comparing these to obama's oath...i need to know if i state this as imagery or a metaphor...please explain

Math 116

_(Y-56)=y+56 is that right. Find an equivalent expression without parenthesis. Subtract _5/16-(-3/8)=1/16 is this right. Please check this for me. Please it seem my problem never get answer I did some last night had not hurt any reply.

POLYNOMIALS

I'm really sorry, i'm preparing for O levels, so i have a lot of maths questions to ask... please excuse me... Question: Find the value of k for which a-3b is a factor of a^4 - 7a^2b^2 + kb^4. Hence, factorise completely. How do i even find k??? Please help thankyou!

psy

hi, i need help on this assigments can you help me please i need to find the following definitions please help me. 1. The danger of overdiagnosis 2. The power of diagnostic labels 3. The confusion of serious mental disorders with normal problems 4.The illusion of objectivity

12th grade A.P. Government

My teacher has selected us to be in particular groups and I am a conservative. So I need to address Education and state the issues like how a conservative would. But I have no idea about it. Can someone please help me??? Please....

Algebra

Help please-I'm doing something wrong- Solve 8x^2 + 6x + 5 = 0 I'm doing square roots and all the steps but it's not working out I come up with -0.38 + 0.5 and -0.38 - 0.5 But it's not right when I go to put it back in. Could you please show the steps-these problems really ...

PLEASE HELP ME MATH

I only have 1 hour to get this question answered. Thank you in advance. I need a quadratic equation in the variable x given the solutions: -7 sqrt 7, and 7 sqrt 7 This needs to be in the standard form of ax^2+bx+c=0. Can someone please help me with this???? I am so lost!!!!

Algebra-Please check-I must have done something wr

Please help-What is the equation of the ellipse with foci (0,6), (0,-6) and co-vertices (2,0),(-2,0) My answer and logic is below but it can't be correct I thought the answer would be x^2/4 + y^2/40 = 1 but that can't be because the choices are: x^2/1 + y^2/40 = 1 or x^2/1 + y...

algebra

I NEED HELP SOLVING THIS PROBLEM ,PLEASE EXPLAIN AND SHOW HOW TO SOLVE the answer ."I HAVE 63 LITERS OF HYDROGEN PEROXIDE, HOW MANY TEST TUBES CAN I FILL IF EACH CONTAINED 7/8 OF A LITER?" PLEASE SHOW ME YOUR WORK. AND THANK YOU IN ADVANCED.

Math Please help!!

2. Mrs. Whimsey’s class is having a pizza party. If there are 16 students and 4 pizzas cut into 8 slices, what answer choice represents the fraction of one pizza each student receives? a) 1/3 b)1/16 c)1/4 d)1/8 Please help :)

math

Thinking about the different types of numbers you learned in this unit, how would you help someone remember the differences between rational and irrational numbers? PLEASE ANSWER NICE AND NEAT AND CORRECT PLEASE AND THANK YOU!! =)

Math (immediate help, please)

A bicycle has 26-inch diameter wheels. If the wheels revolved 2 times after the brakes were applied, the stopping distance is approximately _____. What's the answer? Provide a thorough explanation as well, please.

Math (immediate help, please!)

A bicycle has 26-inch diameter wheels. If the wheels revolved 2 times after the brakes were applied, the stopping distance is approximately _____. What's the answer? Provide a thorough explanation as well, please.

help with chemistry please

Can someone please explain how to do this An equilibrium mixture at 225∘C contains 8.0×10−2M NH3 and 0.20M H2 for the reaction 3H2(g)+N2(g)←→2NH3(g) If the Kc at this temperature is 1.7×102, what is the equilibrium concentration of N2?

Social Studies

Has the effort of Westerners to aid the rest of the world done more good than harm? Its a opinon but i would like a answer please. Please make your answer at least 6 sentences. Thank you very much

History

one more question sorryy xD The process established by the Constitution for electing the president. A popular vote B primary election Cthe Electoral College Im thinking C but this question i don't get so can you please explain it please

History PLEASE HELP

How did the supreme court decision in Worcester v Georgia and the Indian Removal Act lead to the removal and resettlement of native American groups? please help me with this all i want is help getting started or a sample essay

Math Geometry

Unit 1 Lesson 5: Drawing Triangles Quiz if some knows what the answers are then please put them down I have been stuck on this quiz for the past 3 days PLEASE HELP MEEE!!!!!!! 7th grade

physics

a skater with an initial speed of 7.60m/s is gliding across the ice. air resistance is negligible. (a)the coefficient of kinetic friction between the ice and the skate blades is 0.100. find the deceleration caused by kinetic friction. (b)how far will the skater travel before ...

Physics

Please explain to me how to do this question!!!!!!! A beam consists of singly ionised neon-20 atoms all travelling at the same speed, 3*10^5 m/s, through a vacuum. As the beam passes through the magnetic field it follows a circular path of radius 0.125m. The force on each of ...

Physics

Suppose a single electron orbits about a nucleus containing two protons (+2e), as would be the case for a helium atom from which one of the naturally occuring electrons is removed. The radius of the orbit is 2.26 × 10-11 m. Determine the magnitude of the electron's ...

physics (urgent)

onsider the following velocity time graph: (I sent a separate link of the picture as it wouldnt allow me to send it in this box) a)Describe the motion of the object from time t_0 to time_1. b)List two pieces of information (other than speeds or velocities) that can be obtained...

Physics

1. A snowboarder of mass 60 kg is at rest on the top of a sand dune. The coefficients of static and kinetic friction are 0.55 and 0.4675, respectively. 60 kg μk = 0.4675 μs = 0.55  What is the angle  the incline must exceed so that the snowboarder starts sliding? The ...

physics

a piece of iron has a temperature of 18 degrees celsius. A second identical piece of iron is twice as hot. What is the temperature of the second piece of iron? Please explain why.

Physics

A 12kg blcok sits on a table. A 10 kg block sits on top of the 12kg block. What is the force the table exerts on the 12kg block. Please explain any answer.

physics

A spelunker drops a stone from rest into a hole. The speed of sound is 343 m/s in air, and the sound of the stone striking the bottom is heard 1.50s after the stone is dropped. How deep is the hole? how can i use the speed of sound to solve this problem?Please give me some ...

PLEASE HELP ME! PLEASE!

1 )3x + 8y = 1 7x + 4y = 17 Answer: (3,1) 2) -3x + 5y = -7 9x + 2y = 38 Answer: (4,1) 3) 7r + 3s = 13 14r - 15s = -16 Answer: (1,2) 4) 2x - 7y = 42 4x - 14y = 64 Answer: No Solution ?? 5) 9x + 12y = 15 3x + 4y = 5 Answer: Identity ?? 6) 2 = 4s - 3t 2 = 12s - 9t Answer: No ...

Math 116 algebra please check

Multiply 1/7×(-3/7)=-3/49 Please check

lol

please help me in math i don't get it at all so please help meeeeeeeeeeeeeeeeeeeeeeeeeeee!!!!!!!!!!!!math not good

Math! Please help! anyone!

Please help me on my previous question for math! I really need help!

Math- please help!!!

please help me solve these problems! Thank you! 1. Simplify: (3p^5)(5p^2)+(7p^3)(2p^4) 2. Simplify: (6x^2-2xy+3y^2)-(4x^2-xy-y^2)

math

How to make a 10 grams ....anything. ...please help me Please tell me how to make

To Brady, please check

Please check my answers down below.

CALC PLEASE HELP

Suppose that y′=ky, y(0)=7, and y′(0)=4. What is y as a function of t ? PLEASE EXPLAIN

physics

meaning of graw I have never heard that term in physics.

physics

Come up with 10 things (like bowling) that could use physics? What does this mean?

Physics

How do observations of the photoelectric effect conflict with the predictions of classical physics?

physics dicussion question

is there any physics teachers available to help right now?

physics

why is it cold in winter and hot in summer basing on physics knowledge

physics

explain the physics concept to why a ship sounds when moving in water?

AP Physics

hi I need help on this proof ok I'm tyring to prove that v^2 = v^20 + 2a(x -x0) where the zeros are subscripts ok the first step my book says is start out with x = x0 + average velocity (t) then plug in average velocity x = x0 + (2^-1(v + v0))t ok and the next line it says ...

physics (Newton"s law of gravitation)

Could anyone please help me with this problem? I would really appreciate it. The top of Mt. Everest is 8850 m above sea level. Assume that sea level is at the average Earth radius of 6.38×106 m. What is the magnitude of the gravitational acceleration at the top of Mt. Everest...

physics

A pendulum is suspended inside a car vertically suddenly the car is given a horizontal acceleration 'a'.The maximm angle through which the pendulum deflects is ?answer is 2tan inverse 'a'divided by g(acceleration due to gravity please solve this i have given lot of time but ...

Physics

A system absorbs 1000 Joules of heat and delivers 600 Joules of work, while loosing 100 Joules of heat by conduction to the atmosphere, the change in the internal energy of the system will be. My solution. I used U=Q+A, and my answer was 1600, but its real answer is 300 Joules...

Physics help please

A student swims at 4m/s. She is swimming from west to east across a river that's is flowing 2.2m/s [S]. A) if the river is 100 m wide, what is the quickest time that she can swim the entire width? B) how far downstream will she be? C) if she decides to go directly across the ...

physics

A rod with length L and mass m stand on a frictionless table. a ball with mass m and speed u cimped perpendicular to the rod a distance x from the bottom of the rod and sticks to it. what is the angular velocity of the rod+ball after the collison? I need help on how to solve ...

Physics

Judy walks a certain distance due north, then walks twice as far due west. At the end of her trip, the straight-line distance from her starting point to her final position is 112m. a) What is the length of each leg of the trip? b) What is the direction of her total ...

algebra

can some one please help figure this problem out Determine whether each expression is a polynomial.If it is a polynomial, state the degree of the polynomial. 5x^3+2xy^4+6xy can someone please help me

algebra

can some one please help figure this problem out Determine whether each expression is a polynomial.If it is a polynomial, state the degree of the polynomial. 5x^3+2xy^4+6xy can someone please help me

algebra

can some one please help figure this problem out Determine whether each expression is a polynomial.If it is a polynomial, state the degree of the polynomial. 5x^3+2xy^4+6xy can someone please help me

algebra

can some one please help figure this problem out Determine whether each expression is a polynomial.If it is a polynomial, state the degree of the polynomial. 5x^3+2xy^4+6xy can someone please help me

algebra

can some one please help figure this problem out Determine whether each expression is a polynomial.If it is a polynomial, state the degree of the polynomial. 5x^3+2xy^4+6xy can someone please help me

algebra

can some one please help figure this problem out Determine whether each expression is a polynomial.If it is a polynomial, state the degree of the polynomial. 5x^3+2xy^4+6xy can someone please help me

algebra

can some one please help figure this problem out Determine whether each expression is a polynomial.If it is a polynomial, state the degree of the polynomial. 5x^3+2xy^4+6xy can someone please help me

algebra

can some one please help figure this problem out Determine whether each expression is a polynomial.If it is a polynomial, state the degree of the polynomial. 5x^3+2xy^4+6xy can someone please help me

algebra

can some one please help figure this problem out Determine whether each expression is a polynomial.If it is a polynomial, state the degree of the polynomial. 5x^3+2xy^4+6xy can someone please help me

science.. please help!!

i need to find two articles in anything to do with an ecological concern (ex. pollution as a threat to our ecosystem)... please help me find a site, i can't find any good ones!!

math

sums and differences of rational algebraic expression answer the following 2x/x^2-2x-15 - x-2/3x^2+9 another is t/2rs^2 - 2r/3rst + 3s/30r^2t another is 3x/2x-3 - 2x/2x+3 + 3/4x^2-9 please answer this i need it tomorrow morning 3:00 please answer it i will WAIT FOR IT!

MATH HELP PLEASE

You have 33 dogs and 4 kennels. Divide the dogs up evenly so the same number of dogs is in each kennel. I was told to show work and that I could not count part of a dog. Please help. Thank you.

Discrete math

please help I'm completely lost Is the following connected graph a tree please explain There are 4 vertices, two with degree 1, one with degree 2, and the degree of the fourth vertex is not known.

substitution and elimination methods

Can someone please help explain this, my notes aren't helping me much. Given the following system of linear equations: {x-4y=20 -3x+4y=-12 The solution to the system is: The system is: The equation is: Please help

Physics

1. A flowerpot falls from a windowsill 25.0 m above the sidewalk. a. how fast is the flowerpot moving when it strikes the ground? dont i need to know the time it takes, what formula am i supposed to use for this? would 25 m be the displacement? b. how much time does a passerby...

Physics - THIS IS DUE TMRW PLEASE HELP!

The left and right wheels of an automobile are separated by a transverse distance of 1.40 m. The center of mass of this automobile is .6 m above the ground. If the automobile is driven around a flat (no banking) curve a radius of 26.0 m with an excessive speed, it will topple ...

physics : HELP PLEASE

A ball rolls along a desktop with an uniform velocity of 3 m/s. What is the displacement after 10 seconds have passed? A ball is thrown upward with an initial velocity of 18 m/s? What is the maximum height the ball reaches if the ball is assumed to leave from the ground? &#...

physics : HELP PLEASE

A ball rolls along a desktop with an uniform velocity of 3 m/s. What is the displacement after 10 seconds have passed? A ball is thrown upward with an initial velocity of 18 m/s? What is the maximum height the ball reaches if the ball is assumed to leave from the ground? &#...

Physics

A material is formed into a long rod with a square cross section 0.31 cm on each side. When a 100 V voltage is applied across a 16 m length of the rod, a 4.6 A current is carried. What is the resistivity of the material? This is a rectangular wire rather than a cylindrical. I ...

physics

find the force of gravity between 74.0kg physics students that are sitting 85.0 cm apart

physics

why weight of gold varies at 2 different places like panna and ladakh (physics)

physics help 3 please!!

A 2.0 kg cylinder (radius = 0.08 m, length = 0.50 m) is released from rest at the top of a ramp and allowed to roll without slipping. The ramp is 0.77 m high and 5.0 m long. (a) When the cylinder reaches the bottom of the ramp, what is its total kinetic energy? (b) What is its...

Physics

Please help with these problems, I don't understand them. Thanks! Suppose the circumference of a bicycle wheel is 2 meters. If it rotates at 1 revolution per second when you are riding the bicycle, then your speed will be? Suppose you're on a Ferris wheel at a carnival, seated...

Physics-mechanics

Two spheres are placed so that their centers are 2.6 m apart. The force between the two spheres is 2.75 x 10^-12 N. What is the mass of each sphere if one sphere is twice the mass of the other sphere?(please use all the correct formula, and show all working because I want to ...

Physics please help im DESPERATE

A small steel ball bearing with a mass of 17.0 g is on a short compressed spring. When aimed vertically and suddenly released, the spring sends the bearing to a height of 1.23 m. Calculate the horizontal distance the ball would travel if the same spring were aimed 39.0 deg ...

physics

In a thundercloud there may be an electric charge of 46 C near the top of the cloud and −46 C near the bottom of the cloud. If these charges are separated by about 6 km, what is the magnitude of the electric force between these two sets of charges? The value of the ...

Physics

A 37.0-kg crate rests on a level floor. A horizontal force of 50.0 N accelerates the crate at 1.00 m/s2. Calculate the frictional force on the crate. Calculate the coefficient of kinetic friction between the crate and the floor. I got the normal force, 363 N. Now just need ...

physics, collisions, please help

Your bumper car is travelling at 2 m/s. The total mass of you and your car is 350 kg. An empty motionless bumper car with a mass of 250 kg is in your path. How fast in m/s will the empty bumper car move after you collide with it head on? I tried using (m1v1 + m2v2)/m1 + m2 = ...

please help

You know that a cetrain electroscope is charged because the foil extends when there is nothing near to influence it. when a balloon rubbed with fur is brought near (but not near to change the net charge on the electroscope), the gold foil is seen to move slightly downward. Is ...

physics

write down the value of 3.65x10^-6g in kg write down the value of 62microseconds in seconds write down the value og 6.16x10^-7mm in m please help me with these!! thanks!

physics (please help)

Two identical but separate strings, with the same tension, carry sinusoidal waves with the same frequency. Wave A has an amplitude that is twice that of wave B and transmits energy at a rate that is _____ that of wave B. a)half b)twice c) one-fourth d)four times e) eight times...

PHYSICS

What is the phase constant (from 0 to 2π rad) for the harmonic oscillator with the velocity function v(t) given in Fig. 15-30 if the position function x(t) has the form x = xmcos(ωt + φ)? The vertical axis scale is set by vs = 5.50 cm/s. Since i cant figure out ...

Physics help please

You are the science officer on a visit to a distant solar system. Prior to landing on a planet you measure its diameter to be 2.070E+7 m and its rotation to be 19.8 hours. You have previously determined that the planet orbits 1.590E+11 m from its star with a period of 368.0 ...

Mathematics

A Ladder AB, of length 13m, rests against a vertical wall with its foot on a horizontal floor at a distance of 5meters from the wall. When the top of the ladder slips down a distance x meters on the wall, the foot of the ladder moves out x meters. Find x. (I couldn't find this...

Calculus PLEASE HELP! PLEASE PLEASE PLEASE

A long, straight wire of length 2L on the y-axis carries a current I. According to the Biot-Savart Law, the magnitude of the magnetic field due to the current at a point (a,0) is given by B(a)= (mu sub 0 multiply by I) divided by 4pi times the integral from -L to L of (Sine ...

Physics

You are on the roof of the physics building, 46 m above the ground. Your physics professor, who is 1.80 m tall, is walking alongside the building at a constant speed of 1.20 m/s. If you wish to drop an egg on your professor’s head, where should the professor be when you ...

PHYSICS!!!HELP!!

At a picnic, a Styrofoam cup contains lemonade and ice at 0 degree C. The thickness of the cup is 2.0*10^-3m, and the area is 0.016 m^2. The temperature at the outside surface of the cup is 35 degree C. The latent heat of fusion for ice is 3.35*1065 J/kg. What mass of ice ...

Physics (please check!)

A positively charged light metal ball is suspended between two oppositely charged metal plates on an insulating thread as shown below. After being charged once, the plates are disconnected from the battery. Describe the behavior of the ball. Would the ball remain in the center?

physics

A rifle fires a 2.11 10-2-kg pellet straight upward, because the pellet rests on a compressed spring that is released when the trigger is pulled. The spring has a negligible mass and is compressed by 8.37 10-2 m from its unstrained length. The pellet rises to a maximum height ...

Physics please i really need help

Suppose a car is traveling at +23.7 m/s, and the driver sees a traffic light turn red. After 0.427 s has elapsed (the reaction time), the driver applies the brakes, and the car decelerates at 9.00 m/s2. What is the stopping distance of the car, as measured from the point where...

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