physics please HELP !

127,101 results, page 31

physics please help

A golfer, driving a golf ball off the tee, gives the ball a velocity of +40 m/s. The mass of the ball is 0.045 kg, and the duration of the impact with the golf club is 4.05E-3s. (a) What is the change in momentum of the ball? (b) Determine the average force applied to the ball...

Physics

Town A lies 20 km north of town B. Town C lies 13 km west of town A. A small plane flies directly from town B to town C. What is the displacement of the plane. Please explain how you got the answer

Physics

Please Help! I am having difficulties grasping these concepts. Explain please! 1. How much heat energy is required to change 500 grams of water at 100 degrees Celsius to steam at 100 degrees Celsius? 2. How much energy is lost if 7kg of water is cooled from 46 degrees Celsius ...

math

Which equation has the complex number 4-3i as a root? (1) x^2+6x-25=0 (2) x^2-6x+25=0 (3) x^2+8x-25=0 (4) x^2-8x+25=0 I have no clue how to do it!!!PLEASE HELP!!!Please guide by step by step!!THANKS A LOT~!!!!

Math 116 algebra please check

Solve using the multiplication principle. 10x= -90 The solution is x = -9 please check

6th grade

please provide help w/singular plural and possessive nouns, ie, please explain "library's, libraries' and libraries.

R.E

Please help, sorry if i keep re-posting but i have loads of R.E questions for my homework. What do Hindu's do with those who have died please? Thanks

science please help me

I need help finding some descent pictures of radiation. I went on google but their is no good pictures. Please help me!

please help math factor trinomial

y^3-13y^2+36y Can someone please show me step by step that way I can understand. Thank you

Algebra

Solve and graph. I send this problem last night could someone please help me I have trouble with it. x+12<-8 or x+12>2 The solution is { x | x< or X > } please help me with this problem.

biology

is a scientific hypothesis accepted if there is no way to demonstrate that the hypothesis is wrong? please explain. please help needed today. thank you.

science

please help me i am looking for word problems involving potential and kinetic energy i need for my homework in science PLEASE HELP!

algebra

1/x^2+5/x=4 Can someone please help me with this problem by showing the steps that I would have to do to get the answer? I have no idea how to do this. Please help somebody.

math

please answer this my topic is all about sums and differences of rational algebraic expression 3/5 + 4/5 another is x/3 - y/3 another is 7/a + 2/a please answer it thanks!!!!!

Algebra 1

Can someone help me solve this problems please? Thank you very much 7x+9>1x+3= Can someone help me undertand the steps to solving this problem, please.

chemistry

what is the molality of a 10.5% by mass glucose solution?. density of the solution is 1.03g/ml can someone please explain how to do this question. please and thank you

To all chemistry students

Please understand that one of our chemistry tutors is on vacation this week. Please be patient.

science-biology..cells

please give me those parts of animal cell and plant cell.. please separate it..

Algebra 1 (HELP PLEASE!!)

Can you please tell me the roster form and set-builder notation for: N is the set of real numbers that are factors of 12

Social Studies 9

PLEASE i really NEED HELP; and i need this by TOMORROW. -no links please . How and why was Hudson bay company established ?

To Jiskha Teachers ~

Please reply my science post I really want to know if Im correct because I just post and you ignore it. PLEASE check it. Thank You! :)

Chemistry(Please, please help)

If the time elapsed is 4.26 min, what is the value of the rate constant, k? ln[R]t / [R]o = -0.0237 I am not sure how to slove this. Is Rt 4.26 min

science

______________ can prevent some bacterial cells? 7th grade science please help meeeee ms sue help me please thanks

To: bobpursley or any math helper

please help me on my questions, I have a big test tomorrow and I don't understand how to do some questions, please help me

ALGEBRA 2 help please would appreciate

x x _____ - _____ = x^2+9 ________ x+3 x-3 X^2-9 solve for x. and check answer thank you show work please

Algebra 2

Please help me solve and find the excluded values for this problem. Also please show me the work for this problem I want to learn! h(x)=x^2-9/x^2-4x+3

Algebra 2

Please help me solve and find the excluded values for this problem. Also please show me the work for this problem I want to learn!F(h) = x^2-9/x^2-4x+3

math

Please Help!!!!! If i spent 3 hours in homework and of that time 1/3 on math and 1/5 on science, what method could i use to solve this problem????????? Please Help Thanks!!!!

To Ms.Sue Regarding S.F.P.

Dear MS.Sue, could you please tell me what are the controlled and manipulative variables of a Non- Newtonian fluid???? Please!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!:):):):):):):):):):):):):):):):):):):):):)

Calculus

Can you please explain to me what are the qualifications for a function to be continuous? Please explain your response in easy to understand wording. thank you in advanced!

Math- Please check my answer!

Is the fraction 6/8 greater than or less than or equal to 8/10? My answer: 6/8=8/10 Please tell me if i'm correct or not!!! Thank you in advance!

math

Hi can you please tell me if im right on my math practice 1. 4 2/5 - 1 7/10 = A. 2 3/10 B.2 7/10 C.3/ 1 10 D.2 9/10 2. 5 2/3- 2 1/3 A. 3 1/6 B. 3 2/3 C.3 1/2 D.3 5/6 my answers 1. 2 7/10 2. 3 1.6 please respond as soon as possible thank you very much for your help. ;)

Calculus please help!

The limit limh->0 ((sqrt1+h)-1)/h represents the derivative of some function f(x) at some number a. Find f and a. Please help!

physics - please help

A 0.455 kg wood block is firmly attached to a very light horizontal spring (k = 160 N/m). It is noted that the block-spring system, when compressed 5.0 cm and released, stretches out 2.3 cm beyond the equilibrium position before stopping and turning back. What is the ...

physics - please help

A 0.455 kg wood block is firmly attached to a very light horizontal spring (k = 160 N/m). It is noted that the block-spring system, when compressed 5.0 cm and released, stretches out 2.3 cm beyond the equilibrium position before stopping and turning back. What is the ...

Physics

Why is there a centripetal acceleration if the velocity does not increase? a. Velocity changes direction as you move around the circle, causing a Δv b. Velocity in a circle is always constant c. Because gravity will hold any object in a circular motion I am almost sure ...

Physics

I am reviewing for a test and I don't know how to attempt this question. Could someone please work through this problem and then have the general steps that I need to take to solve the question? Here is the question: A rocket expels gases at a rate of 1.30 x 10^3 kg/s with a ...

Physics

I am reviewing for a test and I don't know how to attempt this question. Could someone please work through this problem and then have the general steps that I need to take to solve the question? Here is the question: A rocket expels gases at a rate of 1.30 x 10^3 kg/s with a ...

Physics

I am reviewing for a test and I don't know how to attempt this question. Could someone please work through this problem and then have the general steps that I need to take to solve the question? Here is the question: A rocket expels gases at a rate of 1.30 x 10^3 kg/s with a ...

physics

It is possible to shoot an arrow at a speed as high as 100 m/s. (a) If friction is neglected, how high would an arrow launched at this speed rise if shot straight up? (b) How long would the arrow be in the air? Please help! I do not have any clue as to how to solve. Thanks!

physics

A daredevil is shot out of a cannon at 43.0° to the horizontal with an initial speed of 25.0 m/s. A net is positioned a horizontal distance of 50.0 m from the cannon. At what height above the cannon should the net be placed in order to catch the daredevil? please walk me ...

please help me, physics

Five moles of a monatomic ideal gas expand adiabatically, and its temperature decreases from 410 to 200 K. (a) What is the work done by (or done to) the gas? Include the algebraic sign. J (b) What is the change in the internal energy of the gas? Include the algebraic sign. J

Physics(Please help)

1) A cave explorer 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 1.33 s after the stone is dropped. How deep is the hole? I did 343 / 1.33. Is this correct?

physics

The length and breadth of a rectangular sheet are 16.2 cm and 10.1cm, respectively. The area of the sheet in appropriate significant figures and error is (a) 164 ± 3 cm2 (b) 163.62 ± 2.6 cm2 (c) 163.6 ± 2.6 cm2 (d) 163.62 ± 3 cm2 please explain me what is the correct ...

Physics

In the double slit experiment with light, we know that the spacing of the interference fringes (which is what we call the bright spots on the screen) depends on the wavelength of the light. How? Specifically, if you make the wavelength of the light bigger, how does the spacing...

Physics(Please help)

using the equation y=yo + (vo sin Q) t - 1/2gt^2 I have to find t. The values for y, yo and vo were given to me. So I set the equation up like this: 0=1.005 + (3.107 sin 0) t - 1/2(9.8)(t^2 The sin of 0 is 0 times 3.107 is 0. So 0 = 1.005 t - 4.9 t^2 Now I am stuck. I am not ...

physics

Assume that there is no friction between m2 and the incline, that m2 = 1.8 kg, m1 = 1.4 kg, the radius of the pulley is 0.10 m, the moment of inertia of the pulley is 3.6 kg m2, and θ = 27.0°. Mass 1 is hanging vertically while mass 2 is on the incline. After mass 2 has ...

physics

Assume that there is no friction between m2 and the incline, that m2 = 1.8 kg, m1 = 1.4 kg, the radius of the pulley is 0.10 m, the moment of inertia of the pulley is 3.6 kg m2, and θ = 27.0°. Mass 1 is hanging vertically while mass 2 is on the incline. After mass 2 has ...

please help physics

parallel plate capacitor has an area of 5cm^2 and a capacitance of 3.5PF. the capacitor is connected to a 12v battery .after the capacitor is completely charge up the battery is removed. a)what must be the separation of the plates and the charge density on the plate

Physics

A mass (0.5 kg) and spring (k = 250 N/m) system oscillates with an amplitude of 3.5 cm. a) What is the total mechanical energy of the system? b) What is the maximum speed of the mass? c) What is the maximum acceleration of the mass? I need help please! Do it step by step and ...

Physics

Two students are on a balcony 19.6 m above the street. One student throws a ball vertically downward at 14.7 m/s. At the same instant, the other student throws a ball vertically upward at the same speed. The second ball just misses the balcony on the way down. What is the ...

Physics Please help!

Calculate the position of the center of mass of the following pairs of objects. Use acoordinate system where the origin is at the center of the more massive object. Give youranswer not in meters but as a fraction of the radius as requested. Get data from insidethe front cover ...

pf

i need help with pf. Please specify what your exact question is and please label your question as to the subject, example, English, algebra, chemistry, etc. We will be happy to help you.

Help!

I don't know What United States did for genocide of darfur. Please tell me about it too. I know some site, so please give me some comment of that answer.

algebra

please see below on this page 4 my question. I got an answer, but it wasn't helpful please don't 4get about my question i didn't get any help on it yet thank u

spanish!!...urgent!...please help

how did the geography influence the migration and exploration of colombia? venezuela? i need websitres for this urgent...please help asap... :(

music

Can you please post all the music theory intervals? It is for Rudiments 1 and 2 please. Like perfect 5th and augmented 6th. Thanks

math-repost

Which equation has the complex number 4-3i as a root? (1) x^2+6x-25=0 (2) x^2-6x+25=0 (3) x^2+8x-25=0 (4) x^2-8x+25=0 I have no clue how to do it!!!PLEASE HELP!!!Please guide by step by step!!THANKS A LOT~!!!!

math

how do you subtract the area of a part to find the area of a figure? PLEASE HELP!!!! whoever answers this please type an answer nicely

Earth Science

Why is the Colorado river in central nevada not part of a larger river system? Please help!! i am stuck in this quetion. Please help!!!!!!

Math (Check)

The equation y = a^x is a decreasing function a = 1) 1 2) 2 3) -3 4) .25 I think that the correct answer is 3) -3...but I am not sure why? Can anyone please check if I am right and explain why? Please....Thank you for your help!!!

math

Hi i need one more example of this algebraic expression please. and explain please. Fig# Value 1 0 2 1 3 8 4 27 Math-Nick

Calculus

If anyone can please help me solve this math problem! PLEASE!! Here is the link: img63.imageshack.us/img63/9355/img0002gp.jpg

6th grade

Im having trouble with my Reading.If any of you have any help.with me please do bc i hate Reading and it is very hard for me.I'm in all honors.PLEASE HELP!!!

Spanish, posted Sept. 14

Please go back to your original post for additional information. Please also post a name! Sra

math

find the lcd of this rational algebraic expression 3x+2,2x/x^2-4,x+1/x^2+5x+6 please answer it immidiately i need the answer as soon as possible ..please?

spanish

please translate these sentences into spanish-: 1.how are you? 2don't disturb me? 3.i want to drink something. 4.oh, i got it. 5. I want to do my work. 6.please be quite.

Calculus - please check my work

Differentiate each function a) y = -3x^2 + 5x - 4 b) f(x) = 6/x - 3/(x^2) c) f(x) = (3x^2 - 4x)(x^3 + 1) the answers i got for each was: a) y'= -6x + 5 b) f'(x)= -6/x^2 + 6/x^3 c) f'(x)= 15x^4 + 6x - 16x^3 - 4 please double check and let me know if these are correct, thank you.

Calculus - please check my work

evaluate rounding to 2 decimal places if neccessary a) 1n5 = 1.61 b) lne^2 = 2 c) (lne)^2 = 1 please let me know if these are correct, thank you.

Calculus

Please help find the rational roots of f(x)=4x^4 - 3x^3 + 2x^2 +x - 3 another is f(x)=-3x^3 - 2x^2 + x - 1 I tried but still confuse please help really really need help Thank you very much!

aig

Please solve. Use order of operations. 320-(17+3)-5 = My answer is 323, am i right or not? if not please tell me your answer and how you got it.

college algebra--need help Please!!!

I need to find the vertex and axis of symmetry of the folowing quadratic function. Can someone PLEASE help me!! y= -x^2-6x

Chemistry

Can someone please help with this problem and explain it please? If soil has a density of 1.32 g/cm cubed, then what does 1.0 cubic yards of soil weigh in pounds?

Please Reiny Solve it For me Again! please......

Solve for the value of x: log5(x-2)+log8(x-4)=Log6(x-1)..For your information that 5,8 and 6 are bases not just multipliers. Thank you.

ALGEBRA 2 help please would appreciate

3x-8 over 3x subtract 8 over 7y please show all work help needed. I have no idea how to do it

math ergent please

3. Factor x^4-3x^3-11x^2+3x+10 completely using the factor theorem. (5 marks) SHOW ME ALL THE STEPS PLEASE.

Ratios Math (Please Help)

Please Help, And can you explain how you got the answer? 1. Write the ratio 15:25 as a fraction in simplest form. A) 3/5 B) 15/25 C) 30/50 D) 1/3 2.Which ratio is equivalent to 3/7? A) 6/10 B) 9/21 C) 12/35 D) 7/3

Pre ALGEBRA

what are the next three terms in the sequence -6, 5, 16, 27? A)38,49,60 B)37,47,57 C)36,45,54 D)36,46,57 i think its a Am i right Somebody help me please DAMON,MS.SUE, SOMEBODY PLEASE HELP ME

English

please tell me how can we Use of get + past participle and identify in sentence? I got injured. He will get married. Please tell me by example.

Algrebra, Graphs, Math

How do I sketch my graph of X+Y=3? Please help! I don't understand. Do I need to solve this like the rest of my previous graphs if so, then how? Please Help!

math

someone please help please help don't understand solve each literal equation for the indicated variable. (solve for s) d=c-s ______ n

Download please?

Can anyone please download the prep guide for the nystce exam for me? My computer isn't compatible and I need it a.s.a.p. Thanks in advance.

Pre-Algebra(please check)

Please check these simplified expressions(my answer is after the ;) 4(2k-6)-8(3-3k); -16k-(-48) 9+(-2k)+(-4)-6k; -8k+5 -x+4x-(-8x)-9+2x+1; 13x+(-8) 5(-3x+6)+8x; -7x+30 8+6x+4-8x; -2x+12 5(-m-3)+4m-10; -9m+5

algebra

multiplying monomials - please advise if this is correct? If not please advise where I went wrong? -12sq*3s = -36sq^2

5th math

ms. sue please!explain to me one again i'm not getting it yet. 1/4+1/8= ? step by step please!! thank you..

TO Helper

Helper could you please look through my other Algebra Math posts, I really need help, please and thank you.

chemistry NEED SERIUOS HELP PLEASE!!!!

a)issues of biodegradibility of plastic b)methods of waste disposal and the issues PLEASE HELP THANK YOU

geology please help me urgent if you can please

the question is below: explain the role of sedimentary rocks in the rocks cycle?

Rational Forms

List all the possible rational zeros of f(x)=3x^3-x^2+2x=2. Please help me. I don't understand how to do this. Can someone show me please.

algebra

-4r^2+21r=r+13 3s^2-26s+2=5s^2+1 Please, please could you be so nice and help me with step by step, I can't find right solution, Thank you so much!!!!

Precalculus

Please help!!!!!!!!!!! Find all solutions in the interval [0,2π). 7. 2 sin^2x=sin x Please answer asap

Math

Please help!!!!!!!!!!! Find all solutions in the interval [0,2π). 7. 2 sin^2x=sin x Please answer asap

MATH

PLEASE TELL ME THE ANSWER OF HOW TO DIVIDE 602.88 DIVIDED BY 200. WHAT WILL BE THE ANSWER ? DON'T USE CALCULATOR PLEASE.

Math help please

1. The ordered pairs (1, 1), (2, 8), (3, 27), (4, 64), and (5,125) represent a function. What is a rule that represents this function? Y = x Y = 4x Y = x^2 Y = x^3 I don't know how to solve this please help!

Maths

Can someone please help me out here. I can't figure out how to do them. I need Pr(A) to do them with the formulas that I know. Please help! Given that Pr(B) = 1/5, Pr(A|B) = 1/3 and Pr(A|B') = 1/3. Determine: a) Pr(A and B') b) Pr(A) c) Pr(B'|A)

Math! Please help!

This is an inequality problem/question. I dont know if I'm right in solving this problem: 15 ≤-k/4-9 (k/4 is a fraction) Please help! I got 5.25 ≤k

TO ALL STUDENTS

Please remember these things: 1. This is a homework help website; please put your subject (math, science, English, or ??) in the subject line to make it faster for each teacher to find those questions in his/her areas. 2. Please include in your post the answer or response you ...

physics (cross product vectors)

Two vectors are lying in the xz plane: A=2.00i + 3.00k and B= -9.00i + 2.00k. a) What is the value of AxB? Check my solution: I found through calculations that the value is 23j. b) What is the magnitude |AxB|? I could do ABsin theta, but I have no angle between. So am confused...

physics

a portable electric drill produces 1.2 hp at full load. If 85% of the power provided by the 9.6 V battery pack is useful, what is the current flow? how much power goes into the waste heat? I don't know what to do. In class, we learned about amps, volts,and resistance, but ...

physics. PLEASE HELP

Where do I start? Calculate the water pressure at the bottom of the 50-m {\rm m}-high water tower shown in the photo. Express your answer to two significant figures and include the appropriate units. The question says to neglect the pressure due to atmosphere when doing my ...

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