# physics please HELP !

129,474 results, page 23

### Physics

A satellite has an orbit with pedigree 175 km and apogee 181,200 km. What is the period of the orbit? >>I'm not sure what the associated equation is. I tried the problem using the average radius in the period equation but it didn't work. Please help!

### Physics

Calculate the force of gravity on a spacecraft 19200 km (3 earth radii) above the Earth's surface if its mass is 1600 kg. I've done all the work but I can't seem to get the right answer, please show work and answer.

### PHYSICS PLEASE HELP !!!!!

A mass of 30 kg lies on a horizontal surface with a coefficient of static friction of 0.72 and a coefficient of kinetic friction of 0.31. If a force of 25.1 Newtons is applied parallel to the surface (+x direction if you prefer), what is the magnitude of the acceleration of ...

### Physics

Describe 4 everyday situations where mechanical energy is approximately conserved because work done by the non-conservative forces is ignorable. Please mention which non-conservative force is doing negligible work in each case you cite. Thank you!

### Physics

Please show steps and thank you! An astronaut of mass 70 kg carries an empty oxygen tank of mass 14 kg. He throws the tank away from himself with a speed of 3 m/s. With what velocity does the astronaut start to move through space?

### physics--please help

A half-open pipe is constructed to produce a fundamental frequency of 230 Hz when the air temperature is 17 °C. It is used in an overheated building when the temperature is 39 °C. Neglecting thermal expansion in the pipe, what frequency will be heard?

### Physics :(( help please TT

Small raindrops are actually perfectly spherical. The pressure difference between the inside and outside of a spherical raindrop of volume 4.2×10^−9 m^3 is 280 Pa. What is the surface tension in N/m of the water on the outside of the raindrop?

### physics

You launch a model rocket up into the sky. Right after launch the rocket is accelerating upwards at 10 m/s^2. What is the magnitude of the net force in Newtons on the rocket if the rocket has a mass of 0.1 kg? Please give your answer with solution .

### physics

As a train moves away from you, the frequency of its whistle is determined to be 475Hz. If the actual frequency was 500 Hz and the speed of sound in air is 350m/s, what is the Train's speed? answer is 18.4m/s please show and explain steps

### Physics

Suppose that the amount of heat removed when 2.9 kg of water freezes at 0.0 oC were removed from ethyl alcohol at its freezing/melting point of -114.4 oC. How many kilograms of ethyl alcohol would freeze? I don't know where to start with this question! Please help.

### physics

When swimming across a river you swim to the east at 1.0 mph while the river flows southward at 2.4 mph. Your velocity is a superposition of these two velocities. What is your speed (i.e. the magnitude of your velocity)? i have no idea how to do this please help

### PHYSICS Electricity

A carbon atom's nucleus and its electrons become separated by 20nm . How much work does it take to separate them in J?I found the magnitude of the force the nucleus feels from the electrons,2.07*10^-11 N but the work? Could ex[lain me please?

### physics

A boat moving at 13 mi/hr is crossing a river in which the current flowing at 6 mi/hr.ln what direction should the boat head if it is to reach a point on other side of the river directly opposite its starting point. Please help me I really don't know what to do..

### Physics

a lawnmower with a mass of 12 kg is being pushed by a force of 150n horizontally and 40 n down. if the kinetic coefficient of friction between the grass is 0.9, find the force of friction on the lawnmower. Please explain this as well, I am getting an answer but I don't know.

### Physics repost please clarify

A converging lens has a focal length of 0.060 m. An object is located 0.020 m to the left of this lens. A second converging lens has the same focal length as the first one and is located 0.100 m to the right of it. Relative to the second lens, where is the final image located...

### physics help

a particle moves uniformly around the circumference of a circle whose radius is 8 cm with a period of pi/20 s. the angular velocity w of the particle is a. 2.5 rad/s b. 3.2 X 10^2 rad/s c. 40 rad/s d. 7.9 rad/s e. 96 rad/s please explain thanks!

### Please HELP!!!!! I need to finish this by 12:30!!!

PLease Help!!My teacher is coming to pick this up at 12:30!!! Then don't waste your time pleading. Are you cheating on a test or something?

### HUM 130

Please help me! I ned info. on this ? please I need to explain the desire for liberation from earthly existnce in Hinduism?

### Math

Hello! Please help me out here. How do you find the circumference of something when you of 13in as your radius? Please answer this question.

### calculus

from the equation: x^4 - i = 0 x^4 = i how do you get: The solutions are the fourth roots of i = cos(pi/2) + isin(pi/2) I don't understand how you get pi/2? please full and detailed explanation please.

### science need info please

Where can I find some informations on three different types of ocean water Please ,

### Algebra I

Could someone please help with these problems? 4x squared-5x + 3 if is a.3 b. 0.3 Please show me the work invovled on getting the answer, my teacher requests it. Thank you.

### help please????

please can u give me some advices and sites or ANYTHING that can help me speak english very good and so fast. thank you alot.

### math

Please help me. Thank you! I need help freshing my memory. How do you calculate the slope of a horizontal and a verticle line? I remember how to do a diagonal but that's it. Please and thank you.

### Precalculus(URGENT)

determoine whether the equation defines y as a function of x y= the square root of(-3x-6) please please show work

### Chemistry

How do the qualities of acids and bases help us in the natural world? Please help-I posted this yesterday and I really don't get it-can someone direct me,please? Thank you

### math

I have 2 problems that I need solved. Can someone please help me? t+36t=0 second problem T^2-7t+12=0 Can you show me the steps please?

### Literature

Please summerize and help me to understand M.H.Abrams-Structure and Style in the Greater Romantic Lyric? mail me please,thank you for your concern.

### Algebra one help please?

Find the missing coeffectient in the equation of the line. -4x+by=10 that passes through (2,3) Could someone explain please.. Thanks.

### Biology . Ahh , help me with this question please

summarize how unicellular organisms may have given rise to the first animals ? Please , & thank you(:

### science

determine the weight of an object if its mass is 68kg and the pull of gravity is 9.8 m/s^2. someone please help me an show the work please

### Algebra

Please help-What is the equation of the ellipse with foci (0,6), (0,-6) and co-vertices (2,0),(-2,0) Please explain the steps because I have 5 to do for homework-Thank you-I'm really stuck on this

### statistics

Using the data set below please calculate the 2;8;6;9;5 Range What would be the percentile rank of the number 6? Help please!

### statistics

population with a mean of 53.1 and standard deviation of 4.43 Calculate z score for xbar 49.8 from a sample of size 11 Someone please please help me!

### Languagge

I need websites badly please help. For the following: cultural recourses in america and social and economic factors Please help me

### social studies PLEASE HELP!!1

How do i describe the growth of the Spanish population in New mexico? From about 1650 to 1700. please help!! Thank you!!

### Algebra; PLEASE HELP. D:

I don't understand anything about writing and graphing exponential decay functions../: Explain please, with an example.

### 8th grade math

y=1/4x-1 1/2y=x-2 2x+3y=3 3y=5-2x 4x-y=3 4x=y=1 I don't understand this can someone please help me! This is Systems of Equations please work out the problem and explain it how to do it.

### Chemistry Help Please

i do not understand how to solve this problem, please help 10.0mL 0.5M sulfuric acid can neutralize what volume of 0.5M ammonium hydroxide?

### Math

Evaluate the integral from 0 to 4 of (x+1)/(16+x^2) dx the answers are log(sqrt2) + pi/16 Could you please take me through how to get to that answer please, thank you very much!

### medical transcription

Please help to perfect my grammar, lot of confusion and trouble, please help me. Now usage of "complains of" and "complaints of"

### civics

Q: which industries in the pacific region most affect the nation. can someone please take their time and please help me with this question? Thank you!!!

### Science 8R - Ms. Sue Please Help!!!!

Homework - Draw a cartoon that represent a solid, liquid, and a gas. I'm struggling with this assignment, please help me!!!!

### college algebra--need help please!!

find the domain of the composite function fog. f(x)= 2/x-3; g(x)= 7/x please show all work.

### calculus

find the bound on the real zeros of the polynomial function f(x)=x^4+x^3-4x-6 cna you please show me how you got the answer please

### Analytic geometry

What is the distance of the line x+6y-7=0 from the origin? Please help, is my answer -7sqrt37/37 correct? If not, please help me whats the right solution

### mathURGENT!!!!!!

the lines satisfying the equations x+2y=3 and 3y+ax=2 are perpendicular to each other. find the value of 'a'. please answer and explain how you got, please!!

### english

what are topic sentences and transitions? please tell me and let me know and if you can help me i thank you very much bye oh and please give me the anwsers too so i can get it for the test

### Science Help - Please

Can you please tell me if this is a balanced equation for Zinc and acetic acid... Zn(s) + 2CH3COOH(aq)-->Zn(aq)(CH3COO)2 + H2(g) I would appreciate any help

### please help social studies thank you

Explain the effects of World War II, on both the United States and on Georgia. (5 points) please help

### Math - Please help!

How does increasing the size of an object affect it's volume to surface area ratio? I don't understand please explain it?

### Vocabulary

Criticism A. Analysis B. Summary C. Critique D. Argument A is wrong. Is it C? Please help me Ms.Sue cause your always correct. Am begging for help Please.

### english help please!!

Identify three search combinations you could use to find information about technology on the internet? Please help me....

### math

Which ratios form a proportion? (A)3/15,12/55 (B)8/24,12/35 (C)5/18,25/90*^* (D)4/11,16/25 If I'm wrong please help me and correct me, don't yell at me for not knowing the right answer. please help asap

### Math

Can someone please help me find my maximum height. I have my distance which is 80ft and my angle of elevation is 70ft. PLEASE HELP ME!!

### Please Help

What would be a person target heart rate be if they are 14 years old? I know it starts like 220-14=206 but then what... Please help

### s.s

where were most native americans in north america located when europeans arrived? there are no choices so just help me with this someone please help please!!!!!

### chemistry

How many g of NaOH is needed to make 300.0 mL of a 20 % (w/v) solution? please please show all work I'm very lost

### Math

A cookie jar contains 3 chocolate-chip, 2 peanut butter, 1 lemon, 1 almond, and 5 raisin cookies. a) In how many ways can you select some cookies, if you must include at least one chocolate-chip cookie. Please please please.. reply back asap.. i am totally confused with ...

### 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.

### 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)=

### Damon/BobPursley/Physicstutor/whichoneisright

Q11.The table below shows how the braking distance x for a car depends on its initial speed u. | u / ms-1 | 5 | 10 | 20 | 40 | | X / M | 2 | 8 | 32 | 128 | The relationship between x and u is: doubling speed increases distance by a factor of 4. i)The reaction time of a driver ...

### 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

### 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...

### 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...

### 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.