physics please HELP !

126,957 results, page 33

Math 116 algebra please check

Solve for the indicated letter. e=9f, for f The solution is f = 1/9e Please check this

earth

please write an essay about earth and its environment. please mention a suitable site

Science-Urgent

Can someone please have a moment to look at my other science posts, Please and thank you :-)

Math(Please help)

Find the length of v. Inital point of v = (1,-3,4) Terminal point of v = (1,2,-2) Please help. I am not sure how to start! Thank you.

Algerbra

A teacher did this problem with us in class but I dontn get it please explain. 2xy + 6 ------- 3y + 4x x = 2 y = 6 answer 3 please explain!

math-please check my answer

0.6x + 4 < 1.0x - 1 6x + 40 < 10x - 10 4x > 50 x > 12.5 can someone please check my work and tell me if I am right?

math-please check my answer

what is the slope of the following 2 points (0,-3) and (0,5) Please help I think the slope is -3 am I right?

MS. SUE HELP!

If 4.26 lb of chicken costs $6.77, what would 3.75 lb cost? PLEASE HELP ME MS. SUE D: CAN U PLEASE EXPLAIN ME B4 GIVING ME THE ANSWER

algebra

Please explain:Simplify by removing factors of 1 explain process and exponents steps please.

Algebra

please help me on how to complete the table and evaluate f(x) x=0, x=1, x=2, x=3, x=4 f(x)7/x-1 my answers were -7 for x=0 7/0 for x=1 7 for x=2 7/2 when divided 3.5 ?? for x=3 7/3 when divided 2.3 ?? for x=4 I am not sure if this is correct.. please HELP ME..!

Chemistry- Someone please help ASAP- PLEASE

A compound contains 38.7% K, 13.9% N, and 47.4% O by mass. What is the empirical formula of the compound?

please help!

How do you believe computer mediated communications may affect the future of human communications? PLEASE HELPP !!!!

please help!

How do you believe computer mediated communications may affect the future of human communications? PLEASE HELPP !!!!

Sociology

can someone please tell me what are the causes of alienation? I cant find the answer in many sociology books !!Please help!

math

Help please select the approcimate values of x that are solutions to f(x)=0 where f(x)=-5x^2+8x+5 I so am lost please show me step by step

letter

How can I write a feel better letter to Miley Cyrus? please help and give me so examples please help

Damon, Still need your help please tho

Divide. (25x^2 - 40x + 18) div. (5x - 3) 5x - 5 - 3/5x - 3 5x - 8 - 18/5x - 3 5x - 5 + 3/5x - 3 5x - 14 ~~~~~~~~~~~~~~~~~~~~~ 7x- 14 ------- x - 2 x 7; where x =/ 7 7; where x =/ 2 0 7(x-2)or 7 Damon please

Math

Please help me find the process or fuction rule if input numbers are 1;2;3;4 and output numbers are 4;8;16;32. Please help me

Can someone please help

Can someone help me please?! If you know Spanish II Explain how the imperfect is used to talk about the past.

please help

please answer the question anyone

Please solve it for me!! Please...Maths

x^2-6x+1=(3x+5)/2

Algebra 2

Please, PLease help me with this problem D={z|z|74} e={z|z<=7}

please help me

can someone please help me on my last question ?!!??! thank you

Math- Urgent, please help!

3(4-2X)=-2X -1 1 2 3** Please help, thank you!

Math Please Help ASAP

(m^2-m-3)+(m-4) m^2+m-1 m^2+2m-7 m^2-7 m^2-1 please help, is it D?

physics

A boat travels at 3.8 m/s and heads straight across a river 240 m wide. The river flows at 1.6 m/s. Find A) The boat's resultant velocity. B) How long it takes the boat to cross the river. C) How far downstream the boat is when it reaches the other side. Please help, i have ...

physics!

In a scene in an action movie, a stuntman jumps from the top of one building to the top of another building 4.0m away. After a running start, he leaps at an angle of 15 degrees with respect to the flat foor while traveling at a speed of 5.0 m/s. will he make it to the other ...

physics

A flight attendent pulls her 78.6 N flight bag a distance of 344 m along a level airport floor at a constant velocity. The force she exerts is 44.8 N at an angle of 64.2 degrees above the horizontal. Find the coefficient of kinetic friction between the flight bag and the floor...

physics

the speed of a transverse wave on a string is 450m/s while the wavelength is 0.18m. The amplitude of the wave is 2.0mm. How much time is required for a particle of the string to move a total distance of 1.0km.... The thing that confuses me about this question is the amplitude ...

Physics

Can you please show all your work so that I can understand how the problem is solved? In the Challenger Deep of the Marianas Trench, the depth of water is 10.9 km and the pressure is 1.16 x 10^8 Pa. a) if a cubic meter of sea water is taken from the surface to this depth, what...

physics

A 62.7-kg person jumps from rest off a 2.98-m-high tower straight down into the water. Neglect air resistance. She comes to rest 1.09 m under the surface of the water. Determine the magnitude of the average force that the water exerts on the diver. This force is ...

Physics

I've been trying to solve this problem for the longest time, but I still can't get the answer. The answer is apparently 36 degrees below the horizontal. Please explain!! (: A missile is launched from the ground with a speed of 100 m/s at an angle of 45 degrees to the ground. ...

physics

An airplane whose speed is 150km/hr climbs from a runway at an angle of 20° above the horizontal. What is its altitude two minutes after takeoff? How many kilometers does it travel in a horizontal direction during this two minute period? Find the altitude and horizontal ...

physics

A man cleaning his apartment pushes a vac- uum cleaner with a force of magnitude 57.6 N. The force makes an angle of 25.3◦ with the hor- izontal floor. The vacuum cleaner is pushed 2.71 m to the right along the floor. Calculate the work done by the 57.6 N force. Answer ...

Physics

The melting point of aluminum is 660°C, its latent heat of fusion is 4.00 × 105 J/kg, and its specific heat is 900 J/kg • K. If 300 kJ of heat are added to 442 g of aluminum at 100°C, what is the final state of the system? That is, how much is liquid, how much is solid, ...

Physics- Fluids

Please help! Any advice is appreciated A water faucet in a house is h=8 m below the water surface in the local water tower. The radius of the orifice in the fully opened faucet is r=0.01 m. We assume non-viscous flow in this problem. a) How long does it take to fill a 20 liter...

English

Could you please check these statements, please? Thank you very much. 1) When the monster comes to life, Victor is horrified by the monster's physical appearance. 2)His pearly white teeth and shiny black hair contrast with his dull, yellow eyes, shrivelled complexion and ...

Algebra one PLEASE HELP THX!!

ok i need help with these questions i have been trying to figure them out and my brain isnt working. please help and thank you ahead of time. if you can help. 4. Q.write and algebraic expression for the product of 15 and c A. IS IS C-15 16. Q. define the variable and write an ...

physics

a wheel is rotating at 30 rev/min. The angular velocity of the wheel is a. 2pi^2 rad/s b. 2pi rad/s c. 2 rad/s d. pi/2 rad/s e. pi rad/s explain please!

Math[PLease Check]

Problem: 25-x^2 6 ------ * --- 12 5-x What I got: 5-x --- 2 *PLease Check My Work. No. Factor the 25-x^2 into two factors. Then the 5-x in the denominator divides out. So then is it: 5+x --- 2 yes. 12x12

math help

please show me how to do this I am very lost I keep getting a wierd answer like 16/9 something like that please help me Solve the system by addition. 4x+6y = 9,8x-3y = -7

english

i need help rewording a sentence.... well here it is: Their will and intellect lost ability to know and please God. please help me soon because it's a report due really soon.... thanks

math

y=5x-7 and -3x-2y=-12 I have to find the linear system using substitution I have gotten it to -3x-2(5x-7)=-12 Now I am stuck at solving for x PLEASE HELP any way you can Thanks Oh, and please show me how you did it as well :)

GR.10 CIVICS!!!!!URGENT

CAN SOMOENE PLEASE GIVE ME A LINK TO A PICTURE THAT HAS TO DO WITH OR IS RELATED TO ABORIGINALS GAINING THE RIGHT TO VOTE IN CANADA(1960).PLEASE! ITS URGENT.THANKS

math

Please advise if my answer is correct in solving this question given? If not please advise what I am doing wrong in the equation..ty :) Write the ratio of 4 1/3 to 6 in simplest form. 4 1/3 = 13/3 = 48 6 = 12/3 = 36 48/36 = 4/3 = 1 1/3

8th grade 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

psychology

hi can you please help me with the following 1) performance goals 2) mastery goals 3) the effect of praise 4) Expectations and self-efficacy i need the websites where i can get information from. please help me thanks

medical

Hi my name is Ava and I'm in 6th grade. I want to go in the field of medical can you please tell me some pepration methods Ican use in this age? please=]

science please help

could you please give me an example of the following(types of friction) : -static -sliding And also: -friction -buoyant force -air resistance Thank You!

CHEMISTRY..please help..thanks

If you add 23.5g of NaCl to 1.2 kg of water, what will be the boiling point and the freezing point of the new solution? (Kf=1.86, Kb=0.52) (Please show work, I appreciate everything)

Algebra II-Please help!!

Please help-I'm really mixed up How do I find the permutations of the first 12 letters taken 3 at a time? I have a ton of these to do and really don't understand them at all-

Maths

The product of two positive consecutive odd numbers is 255. What are the numbers? Please write this problem in quadratic equation form please

Maths

The sum of the squares of three consecutive positive integers is 365 What are these integers? Please write this problem in quadratic equation form please

square roots

i know this problem is really easy but i am having a brain freeze day will someone please help me figure out what the square root of 32 is? Please & thank you!

important to any teacher

please any jiskha teacher that be online you please able to delete my english posts? i not want anyone landng on my post asking same questions on google. thank you.

french

i want to learn this language. Please write some french sentences and also translate them into english. Please earlier, its very urgent.

chemistry please help me please!!!

When one student did this experiment, he started with 19.5 mL of 0.118 M monoprotic acid. The endpoint was reached when 17 mL of base was added. What was the concentration of the base?

math

what is the average weekly food expense of the johnson family during a 4-week period in which they spent $72.84,$61.20,$75.48,and $68.76 for their weekly grocery shopping? 1] $69.07 2] $69.57 3] $71.07 4] $72.51 5]$73.04 please help me please

Can anyone please help me this biology please !!!

I am really stuck in this biology it super hard how do yeast cells benefit from fermentation ?I wil be happy if anyone would help me out thanks.

Finance

CAN SOMEONE PLEASE PLEASE HELP ME WITH A FINANCE QUESTION THAT I POSTED YESTERDAY,WEDNESDAY,FEB 27TH @ 5:58PM.PLAEASE,ANY AND ALL HELP WILL BE GREATLY APPRECIATED

science- physic please help

Well I did a Pendulum lab. The length of my pendulum on a string was 95 centimeters and it took 19.15 seconds to complete the 10 cycles. Please help me to find the frequency.

vocabulary power unit 5 grade 6

I am trying to find the meaning of this homework: cicle the letter of the word that is a synonym of the boldfaced word. Can you please help me...PLEASE!!!!

Algebra please help out

If the number in the numerator of a unit rate is 1, what does this indicate about the equivalent unit rates? Please help answer and give an example. Thanks

Chemistry

what volume of 0.120 M NaOH must be added to 100 ml of 0.100 M NaHC2O4 to reach ph of 4.70? The answer is 60 ml but I don't know how to find it. Can you please show me the steps and how to do it please

Algebra 2 help please.

What is the length of the radius of a circle with a central angle of 255° that intercepts an arc with length 52 m? Use π=3.14 in your calculation. how would i solve this? please help!

Physics - Mini Lab

The reason I didn't do this was because I was gone the day they did this at school. And the teacher said I couldn't do it at school. So I need help and my teacher is a jerk, so I have no idea what to do. Please help me. I really need a good grade in this class. Please and ...

English

Hi! Can somebody help me? I'm an austrian student, and i have a big problem! We have to write a definition essay with the title : tourism/ travel. and we have to write it until tomorrow, but i'm very busy, i have a mathe test tomorrow too, and i am not able to write my essay. ...

Science- PLEASE HELP SOMEONE!!!!!!!!!!!!! PLEASE

20. If changing conditions lead to decreased oxygen levels in the stream, the carrying capacity of the stream for the trout will decrease. Oxygen level in water is therefore (an) ___________ with respect to the number of trout that a particular stream can support. 22. ...

physics please help

A spring is hung from the ceiling. A 0.300 kg block is then attached to the free end of the spring. When released from rest, the block drops 0.170 m before momentarily coming to rest. (a) What is the spring constant of the spring? (b) Find the angular frequency of the block's ...

AP PHYSICS PLEASE HELP

A basketball player makes a jump shot. The 0.700 kg ball is released at a height of 1.90 m above the floor with a speed of 7.00 m/s. The ball goes through the net 3.10 m above the floor at a speed of 3.70 m/s. What is the work done on the ball by air resistance, a ...

physics

The magnetic field in the region shown below is increasing by 5 T/s. The circuit shown (with R=25 , C=55 µF, dimensions 1 m by 2 m) is inserted into the region as shown. The capacitor is initially uncharged. 1. How long will it take the capacitor to charge to 25% of its final...

Physics please help!

The far point of a nearsighted person is 5.8 m from her eyes, and she wears contacts that enable her to see distant objects clearly. A tree is 18.7 m away and 1.8 m high. (a) When she looks through the contacts at the tree, what is its image distance? (b) How high is the image...

Physics(Please help)

1) A man (mass = 80.9 kg) jumps straight down from a bridge into a boat (mass = 482 kg) in which a criminal is fleeing. The velocity of the boat is initially +14.5 m/s. What is the velocity of the boat after the man lands in it? would I subtract the two masses and then ...

7th grade math Ms. Sue please help I have no idea!

#10 On a blueprint, 1 inch = 13 feet. If the dimensions of the playroom on the blueprint are 0.35 inches x 1.25 inches, what are its actual measurements? * *Show all your work for full credit* #11 The coordinate of rectangle ABCD are given. Find the coordinates of its image ...

Physics

A 79.5 kg snowboarder heads down a 28.0° hill that has a height of 62.8 m. If the hill is assumed to be frictionless and there is horizontal wind with a force of 98 N acting against the snowboarder, find the speed of the snowboarder as they reach the bottom of the hill using ...

Physics ***HELP***

please explain how you got the answer car A - 20m/s car B - 30m/s Assume that both cars are 5m long. Suppose that car B is 20m behind car A is attempting to overtake car A. How long will it take for car B to arrive 10m ahead of car A?

Physics

Find the speed, v, of a pendulum at the bottom of its swing (B), given that it has mass m and initial height at A is h (the difference in height from B to A). Your answer will be in terms of g as well. Included is a drawing of a pendulum at its maximum height (A), and at its ...

PHYSICS!

Orville walks 270 m due east. He then continues walking along a straight line, but in a different direction, and stops 230 m northeast of his starting point. How far did he walk during the second portion of the trip and in what direction? Please I need a good explanation for ...

Physics help

Orville walks 270 m due east. He then continues walking along a straight line, but in a different direction, and stops 230 m northeast of his starting point. How far did he walk during the second portion of the trip and in what direction? Please I need a good explanation for ...

Algebra 2

please please please help

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 ...

AP physics

do you guys have an someone that good with advanced physics, because i have a few problems that i am not sure how to do and its for my AP physics class, and I wasn't sure if you had someone on board now that could help thanks

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 ...

Physics

To combat wasteful habits, we often speak of “conserving energy,” by which we mean turning off lights, heating or cooling systems, and hot water when not being used. In this chapter, we also speak of “energy conservation.” Distinguish between these two usages. Please ...

Physics

A synchrotron radiation facility consists of a circular ring that has a 48.0 m radius and creates an electron beam with a current of 497 mA when the electrons have a speed approximately equal to the speed of light. How many electrons pass a given point in the accelerator per ...

physics

While sitting on a tree branch 10.0 m above the ground, you drop a chestnut. When the chestnut has fallen 2.0 m, you throw a second chestnut straight down. What initial speed must you give the second chestnut if they are both to reach the ground at the same time? Answer is 8.8...

physics

Two point charges are located as shown in the figure, with charge q1 = +3.2 C at x = − 3.0 m, y = 0, and charge q2 = +2.5 C at x = +1.0 m, y = +2.0 m. An electron is now taken from a point very far away and placed at the origin. How much work must be done on the electron...

physics

A dart is thrown horizontally with an initial speed of 6 m/s toward point P, the bull's-eye on a dart board. It hits at point Q on the rim, vertically below P, 0.29 s later. Neglect air resistance. (a) What is the distance PQ? (b) How far away from the dart board is the dart ...

Physics-Please check

If I went tubing with my little sister, and I have a larger mass, why would we both reach, in terms of energy, the bottom of the hill at the same time; Originally I thought becuase we would both be accerlerating at the same rate but that doesn't explain the energy part does it?

physics

Two point sources produce waves of the same wavelength and are completely out of phase (that is produces a crest at the same time as the other produces a trough). At a point midway between the sources, would you expect to find a node or an antinode? Why? Please show work, ...

Physics

Margaret walks to the store using the following path: 0.435 miles west, 0.280 miles north, 0.300 miles east. What is her total displacement? That is, what is the length and direction of the vector that points from her house directly to the store? Find magnitude in miles and ...

Physics

A car is speeding at 33.4 m/s. A police car starts in pursuit from rest when the car is 100 m past the cruiser. At what rate must the cruiser accelerate to catch the speeder before the state line, 1.2 km away from the speeding car? Include all steps if possible please, so that...

PHYSICS

Allegra's favorite ride at the Barrel-O-Fun Amusement Park is the Flying Umbrella, which is lifted by a hydraulic jack. The operator activates the ride by applying a forcce of 72 N to a 3.0-cm-wide cylindrical piston, which holds the 20000. N ride off the ground. What is the ...

intro to physics

an athlete executing a long jump leaves the ground at a 28 degree angle and lands 7.6 m away. part a )what was the takeoff speed ? part b) if this speed were increased by just 8.0% , how much longer would the jump be ? for part a) i got roughly 9.48 but i am getting the ...

Physics- PLEASE HELP

Two boxes of fruit on a frictionless horizontal surface are connected by a light string as in the figures below, where m1 = 15 kg and m2 = 17 kg. A force of 58 N is applied to the 17 kg box. Repeat the problem for the case where the coefficient of kinetic friction between each...

Physics- PLEASE HELP

Two boxes of fruit on a frictionless horizontal surface are connected by a light string as in the figures below, where m1 = 15 kg and m2 = 17 kg. A force of 58 N is applied to the 17 kg box. Repeat the problem for the case where the coefficient of kinetic friction between each...

PHYSICS PLEASE HELP!

A crowbar lever , with a 3 inch long nail remover connected to a 20inch handle. If you push down on the handle end with a force of 40 N, what force is available to remove a nail? HINT: a Crowbar isnt all that different from a seesaw, except the pivot is far off center.

PHYSICS PLEASE HELP

A crowbar lever , with a 3 inch long nail remover connected to a 20inch handle. If you push down on the handle end with a force of 40 N, what force is available to remove a nail? HINT: a Crowbar isnt all that different from a seesaw, except the pivot is far off center.

physics

A cube of mass m1 = 7.7 kg is sitting on top of another cube of the same size and mass m2 = 0.6 kg while they are both in free-fall. Ignoring any air resistance, what is the magnitude of the normal force with which the bottom cube is acting on the top cube? for this question. ...

physics

A boxcar of mass 3.21 x 10^4 kg is rolling south at 5.16 m/s when it collides and couples with another boxcar of mass 5.18 x 10^4 kg that is rolling north at 2.38 m/s. What is the velocity of the coupled boxcars after collision? Take north as positive and express your result ...

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