# physics please HELP !

128,227 results, page 58

### Physics Word Problems

Could you please explain to me these problems, I don't understand them. Do 100 J of work in 50 s and your power output is? - I got 2, but not sure of the units. A bow is drawn so that it has 40 J of potential energy. When fired, the arrow will ideally have a kinetic energy of...

### AP physics

Suppose a Chinook salmon needs to jump a waterfall that is 1.50 m high. If the fish starts from a distance 1.00 m from the base of the ledge over which the waterfall flows, find the x- and y-components of the initial velocity the salmon would need to just reach the ledge at ...

### Physics (PLEASE HELP)

A generating station is producing 2.00 106 W of power that is to be sent to a small town located 7.0 km away. Each of the two wires that comprise the transmission line has a resistance per kilometer of length of 5.00 10-2 /km. (a) Find the power lost in heating the wires if ...

### Physics- Elena please help!

A coin rests 18.0 cm from the center of a turntable. The coefficient of static friction between the coin and turntable surface is 0.420. The turntable starts from rest at t = 0 and rotates with a constant angular acceleration of 0.650 rad/s2. (a) After 3.00 s, what is the ...

### Physics- Elena please help!

A coin rests 18.0 cm from the center of a turntable. The coefficient of static friction between the coin and turntable surface is 0.420. The turntable starts from rest at t = 0 and rotates with a constant angular acceleration of 0.650 rad/s2. (a) After 3.00 s, what is the ...

### Physics and the movies

Would A.I. and Pearl Harbour be good movies to analyze for physics mistakes?

### physics

Name of physics book for 11 and 12.to catch engineering exam and other competetive exam

### GEOMETRY URGENT PLEASE

(imageshack)(.)us(/)photo (/) my-images (/)42(/)2vja. jpg(/) Open that link please , just delete the parentheses please please help me with my assignments I beg you cooperate with me huhu 1. in the figure , the areas of traingle cef, triangle abe, triangle adf are 3,4, and 5 ...

### Physics, Please help today

0.0100kg particles have been glued to a rod of Length L=6.00cm and negligible mass and can rotate around a perpendicular axis through point O at one end. How much work is required to change the rotational rate (a) from 0-20.0 rad/s, (b) from 20.0 rad/s to 40.0 rad/s, and (c) ...

### Physics- Elena please help!

A large grinding wheel in the shape of a solid cylinder of radius 0.450m is free to rotate on a frictionless, vertical axle. A constant tangential force of 180 N applied to its edge causes the wheel to have an angular acceleration of 0.870 rad/s2. (a) What is the moment of ...

### Math

Simplify: 5x{24-19)x[25+23)divided by 12-(9-7)} Please help! Subject is algebra. sorry- please help! Am I working the problem correctly? IS THE ANSWER 50? 5x{24-19)x(25+23)divided by (12-(9-7)) = (5x5x48)/(12-2) = (25 x 48)/10 = ? No, the answer is not 50. As best as I can ...

### 5th grade math

Which answer shows data with a range of 49? A. 45,69,92,59 B. 95,59,52,89 C.99,66,51,52 D.55,99,78,50 if you select one of the answer .How do you solve the problem.? i was wonder how ?please explain your answer please!! so the next problem i try to solve by myself.for me thank...

### Official meaning

What is an official? A person who holds an office. Could you please explain more to me? What is a governor? An appointed or elected official who governs a state, colony, or province for a specific term. Could you please explain more.

### math30

A sequence has a first term of 24 and every other term is one half of the previous term. Find a recursive formula that defines this sequence. The answer of this question is: an=an-1*1/2 Somebody can help me and let me know why is 1/2 on the formula? please please!!!

### SAT Math

I don't remember what problem I struggled to understand... But it was something like this... There are 3000 numbers so how many of them are odd.. Something like that.. Please give me a problem like that and please teach me!!!! I hope you know what I am talking about!!

### math help please!

Assuming that limits as x → ∞ have the properties for limits as x → c, use algebraic manipulations to evaluate lim x → ∞ for the function. a. f(x) = x − 2/2 + 6x^2 b. f(x) = x^2 + 6/x + 7 Please help! I do not know how to start with this ...

### Language Arts

I need to practice writing summaries and small essay for my 9 week exam and I am not very good at writing summaries or essays. Can you please help me or provide me with a website that I am able to do practice summaries on. Please help.

### English

1. Please call at 123-4567. 2. Please call 123-4567. 3. Please call me at 123-4567. (Which expressions are right?)

### math

Please help. Please. using the numbers 24 12 2 7...in any addition subtraction division or multiplication combination, i have to come up with the sum of 24. Help. I have tried every combination i can think of the closest i have come is 22 or 26

### Calculus Help Please!!!

In a murder investigation, the temperature of the corpse was 32.5 C at 1:30pm and 30.3 C an hour later. Normal body temperature is 37.0 C and the temperature of the surrounding was 20.0 C. When did the murder take place? PLEASE SHOW STEP BY STEP

### Mathematics-Algebra PLEASE HELP,PLEASE!!!!!!!

In a two-digit number, the tens’ digit is 1 less than the units’ digit. If the digits are interchanged, the sum of the number obtained and the original number is 143. Find the number.

### S.S. Please help!

Check answers please! 1. Many indigenous people in Guatemala live in the mountains because it is the only land available to them the soil is very good for farming*** they don't speak Spanish mountain villages are easy to defend against attacks 2. All of the following are ...

### physics

i'm having a lot of trouble with these and can't seem to figure them out no matter how many times i replace variables in my equations and write down what i know and need and i don't know what to do about it anymore. The speed of a boat undergoing constant acceleration ...

### English

What does it mean to vary the sentence pattern within a written work? (Please give some answer...Not just a web link...And if you give a link please give info on where answer might be located.)

### Algebra

Please my mentors, I urgently needs your support please. A number of two digits is such that the tens digit is 8 less than seven times the unit digit. When the digits are reversed, the number is decreased by 9. What is the number?

### Physics

An object is placed in front of a converging lens in such a position that the lens (f = 13.2 cm) produces a real image located 23.5 cm from the lens. Then, with the object remaining in place, the lens is replaced with another converging lens (f = 18.8 cm). A new, real image is...

### math

please help thanks :) what does PITI mean example Find the monthly PITI payment of this loan ? Sue recently purchased a home, taking out a mortage of $235,000 at 8 3/4% for 25 years annual property taxes are $6,345 and annual hazard insurance premium is $1,479 please explian ...

### Algebra-- PLEASE help!

Pete's Plymouth travels 200 miles at a certain speed. If the car had gone 10 mph faster, the trip would have taken 1 hour less. Find Pete's speed. I am very confused about how to solve this problem! Please explain well. Thank you so much!!! :-)

### SS7R HELP!

I have a worksheet for which is due tomorrow and my teacher is grading it. I'm having trouble with 3 questions (it have 7 questions) please help me. 1. Why did the western farmers oppose Spanish and French control of New Orleans? 2. Why was Toussaint L' Ouverture important to ...

### Math Please Help

A pizza box top with a square base is to be made from a rectangular sheet of cardboard by cutting six 1-inch squares from the corners and the middle sections and folding up the sides. If the area of the base is to 144 in^2, what piece of cardboard should be used. Please ...

### Trigonometry

PLEASE HELP!! I really don't understand this...I just started learning about trigonometry and SOH CAH TOA and I think this probably has to do with that but I don't know how to apply it... Please explain this to me!!!! I need to know how to do it and not just the answer. ...

### Physics

I've been working on this problem for close to an hour now and keep getting very wrong numbers... The two objects with different mass (m1 = 5.0 kg and m2 = 3.0 kg) in the Atwood's machine shown in the figure are released from rest, with one object at a height of 0.91 m above ...

### Algebra (please help!)

Mary has a solution that is 60% alcohol and another that is 20% alcohol. How much of each should she use to make 100 milliliters of a solution that is 52% alcohol. I totally forget how to do this kind of problem. Please help if you can! Thank you so much! :)

### Math

A bag contains 6 red marbles, 3 white marbles, and 7 blue marbles. You pick a marble without looking. Find the probability of drawing a white marble. A. 3/7 B. 7/16 C. 3/16 D. 13/16 Please help please and thank you

### AP Physics

A Physics book has a height of 26 cm, a width of 22 cm, and a thickness of 4 cm. Find the pressure that the Physics book exerts on a desktop when the book lies face up and when the book is balanced on its spine. I know that P=F/A, I am just not sure which dimensions of the ...

### Physics

I studied the equation of time recently and understand the Earths keplerian orbit is responsible for it. I understand the keplerian orbit described the Earths elliptical path and it was this alone that created the equation of time. I have just read that the Earth does not ...

### Physics

A child is twirling a 0.0116 kg ball on a string in a horizontal circle whose radius is 0.102 m. The ball travels once around the circle in 0.560 s. (a) Determine the centripetal force acting on the ball. N (b) If the speed is doubled, does the centripetal force double? yes no...

### Physics

A child is twirling a 0.0116 kg ball on a string in a horizontal circle whose radius is 0.102 m. The ball travels once around the circle in 0.560 s. (a) Determine the centripetal force acting on the ball. N (b) If the speed is doubled, does the centripetal force double? yes no...

### physics Classical Mechanics

Hi, Greco. I am using the following formula to solve Ballistic Missile: sqrt(5*G*m_1/4*r_1). Given the following: m_1=5*10^24kg; r_1=6000;alpha=30 degrees;r_2=(5/2)r_1; G= 6.674*10^-11kg/m^3s^-2. I thought I did it correctly using the proper formula. My answer was incorrect. I...

### physics

A 0.700-kg ball is on the end of a rope that is 2.20 m in length. The ball and rope are attached to a pole and the entire apparatus, including the pole, rotates about the pole's symmetry axis. The rope makes an angle of 70.0° with respect to the vertical as shown. What is the...

### physics

A 0.700-kg ball is on the end of a rope that is 2.20 m in length. The ball and rope are attached to a pole and the entire apparatus, including the pole, rotates about the pole's symmetry axis. The rope makes an angle of 70.0° with respect to the vertical as shown. What is the...

### college physics

If a girl drops a coin into a wishing well. After exactly 5 seconds she hears it splash into the water. How fast was the coin going after 1 second? After 2 seconds? How fast was the coin going when it hit the water? How far down is the water? Could you please help with the ...

### physics help 2 please!

The air inside a hot air balloon has an average temperature of 84.3°C. The outside air has a temperature of 15.3°C. What is the ratio of the density of air in the balloon to the density of air in the surrounding atmosphere? inside / outside = ??

### Physics

A block of mass 50 kg is pulled on a frictionless floor by F=210N directed to 30angle horizontally, If the block moves 3m, find work done? a. 115 √2J b. 315 √3J Answer is B 315 √3J , my question is how to solve it in this way i mean, i solved it like this, w=...

### Physics(Please help, thank you)

1) A student, starting from rest, slides down a water slide. On the way down, a kinetic frictional force (a nonconservative force) acts on her. The student has a mass of 71 kg, and the height of the water slide is 12.0 m. If the kinetic frictional force does -7.4 × 10^3 J of ...

### MATH/CHEM PLEASE HELP!

Give the answer to the following calculation with the correct number of significant digits. Report your answer in scientific notation. (6.17 x 10-1 + 4.9 x 10-2) x (3.95 x 10-2 + 6.454 x 10-3) i know how to solve for the answer, i just don't know the correct number of sig figs...

### JAVA PROGRAMMING

"POWERS" Compute the power of a number given the base and exponent. Do three versions of this program using a while loop, a do-while loop and a for-loop. Introduction Please help..i don't know how to input this in java...please help.tnx

### calculus

I have two questions please. 1. find an equation for the line with the given properties. Express in slope-inntercept form. 2. find the equation of a line that is perpendicular to the line y=1/2x+4 and contains the point (-3,0) please show work

### calculus

I have two questions please. 1. find an equation for the line with the given properties. Express in slope-inntercept form. 2. find the equation of a line that is perpendicular to the line y=1/2x+4 and contains the point (-3,0) please show work

### 5TH GRADE MATH PLEASE HELP

Draw an equation or function table. The cost of shipping mittens purchased online is $2 plus $6 for each of pair of mittens. What is the total cost of buying 5 pairs? P = pair of mittens. Can you please help me with this problem?

### physics

A closed box is filled with dry ice at a temperature of -78.5 degree C, while the outside temperature is 21.0 degree C. The box is cubical, measuring 0.350m on a side, and the thickness of the walls is 3.00*10^-2 m. In one day, 3.10*10^6 J of heat is conducted through the six ...

### physics

Suppose a cylindrical habitat in space 7.70 km in diameter and 25.0 km long has been proposed. Such a habitat would have cities, land, and lakes on the inside surface and air and clouds in the center. They would all be held in place by rotation of the cylinder about its long ...

### Physics- Work

A worker pushes a 1.50*10^3 N crate with a horizontal force of 345 N a distance of 24.0 m. Assume the coefficient of kinetic friction between the crate and the floor is 0.220. a. How much work is done by the worker on the crate? b. How much work is done by the floor on the ...

### Physics

On a spacecraft, two engines are turned on for 666 s at a moment when the velocity of the craft has x and y components of velocity V0x = 3485 m/s and V0y = 5690 m/s. While the engines are firing, the craft undergoes a displacement that has components of x = 4.48 * 10^6 m and y...

### Physics

A spring fixed to a wall is attached to a 6 kg block of wood on the other end. The block rests on a frictionless surface. The spring with spring constant 100 N/m is compressed by 0.1 m and releases. With what frequency and period will the block/spring system oscillate? -I drew...

### egypt

can any one please tell me info about egypt like about cario...... because i need tomake a leaflet about egypt please help me.....

### Physics

If an object on a horizontal frictionless surface is attached to a spring, displaced, and then released, it will oscillate. If it is displaced a distance 0.130 m from its equilibrium position and released with zero initial speed. Then after a time 0.803 s its displacement is ...

### physics

Design some simple digital circuits based on Boolean expressions. Draw circuits that implement the following Boolean expressions using some combination of AND, OR, NOT, NAND, and NOR gates. - NOT X OR NOT Y OR Z - X OR Y OR NOT Z - NOT X AND Y OR NOT Y AND Z Write a two to ...

### physics

1)The difference of potential between terminals of a battery is 6V. How much work is done when a series of negative charges totaling 0.5 C are moved from one terminal to another? 2) Two parallel metal plates have opposite charges and a difference of potential of 1000V between ...

### Physics. Please help!

A green sedan weighing 25,000 Newtons is put on a lift supported by a piston with a cross sectional area of 0.1 square meters. What is the minimum force that must be exerted by the air compressor that pushes down on the oil in the reservoir of the lift system in order to ...

### PHYSICS (CHECK WORK)

I am getting the wrong answer. Can you please check my work? My answer is off by a multiple of ten. A sample of an unknown material appears to weigh 295 N in air and 165 N when immersed in alcohol of specific gravity 0.700. (a) What is the volume of the material? ___________m^...

### physics

A metal container, which has a mass of 9.4 kg contains 14.2 kg of water. A 1.7-kg piece of the same metal, initially at a temperature of 160.0°C, is dropped into the water. The container and the water initially have a temperature of 15.0°C and the final temperature of the ...

### Physics

In a hydraulic lift, the radii of the pistons are 2.93 cm and 10.1 cm. A car weighing W = 11.0 kN is to be lifted by the force of the large piston. (a) What force Fa must be applied to the small piston? N (b) When the small piston is pushed in by 10.4 cm, how far is the car ...

### physics

I have no idea. Please help. Thank you. The drawing shows a sulfur dioxide molecule. It consists of two oxygen atoms and a sulfur atom. A sulfur atom is twice as massive as an oxygen atom. Using this information and the data provided in the drawing, find (a) the x coordinate ...

### Science-Please Help

I've got to describe homologeous chromosomes in terms of the type and # of genes that they possess. How would I describe that? -The genes on one of the chromosomes in the pair correspond to the genes on the other chromosome in the pair. (Have I done this correctly? I'm not ...

### Geometry

Please Please HELP!!!! I need the answer to this and i've worked it out but I don't know if it is correct... Please check my answer!!!! The polygons are regular polygons. Find the area of the shaded region to the nearest tenth. I can't post a picture of it but it shows a ...

### Math

I don't remember sampling methods... i do know that there are three and one of them is litteraly called 'random'. if i can please be reminded of the methods i can finish the last 3 problems of my math.... i don't like math especially if you have a field reading test for the ...

### English 7 Help! - please read

In the second paragraph the author writes "Of all the things for which Jamie held a soft spot in her heart, the tree house was perhaps the dearest". What does the phrase "soft spot" mean in this sentence? My Answer - the part that is soft.... ok im having trouble in this ...

### pre calc

The population of a Midwestern city decays exponentially. If the population decreased from 900,000 to 800,000 from 2003 to 2005, what will be the population in 2008? Please help I got 670,422 and the computer marked it round i then tried rounding it to 671000 but it was still ...

### Algrebra II-please check my answer

Determine the zeros of the function 7x^2 + 9x = 0 answers were: {-9/7} {-9/7,0} {o,9/7} {9/7} I think the answer is {-9/7,0} but I'm not positive when I worked it-If this is wrong please steer me into the correct calcs because then I don't what I'm doing wrong 2.Solution to ...

### 7th grade math Ms.Sue help please

4. What is the distance between Nicholas’s school(3,2)and the post office (-2,-2)? 6.4 5.2 3.6 3.0 5. If Nicholas is located at (– 3 , 2), what is the distance to get to the grocery store (1,-1)? 2 3 4 5 I have no idea how to solve these i have tried the Pythagorean ...

### business plan

Please respond I did review the information you gave me and I was told to anwer this question. can you please respond with your assistance how to answer this question. How can I clearly state sound reasons that my services are currently viable and how I will react to future ...

### Physics help please**

A water pipe having a 2.1 cm inside diameter carries water into the basement of a house at a speed of 0.88 m/s and a pressure of 169 kPa. The pipe tapers to 1.0 cm and rises to the second floor 7.1 m above the input point. (a) What is the speed at the second floor? ? m/s (b) ...

### physics

How can I calculate the spring constant given only the following: equilibrium length of spring: 10.5 cm stretched length of spring (by attaching a mass): 12.5 cm object's mass: 198.9 grams -please help me...I'm really lost... You need to assume that the measurement was made at...

### Math, Please Help!!!

4/x^2 - 4x + 3 < 5/x^2 - 9 This is a rational inequality. it is 4 divided by x squared minus 4x plus 3 is less than or equal to 5 divided by x squared minus 9. Please help!!!

### geometry

I'm stuck on this question please help. "GK bisects angle FGH". If angle FGK=8v-2 and angle KGH=3v+3,find angle FGH. PLEASE HELP ME

### HELP ME PLEASE & FAST!!!!!!!!!

Hi, I need help. Does desertification come from Ancient China or Ancient Africa? Please I really need the help fast. Thanks so much!

### Physics

A gymnast is performing a floor routine. In a tumbling run she spins through the air, increasing her angular velocity from 3.00 to 5.75 rev/s while rotating through one-half of a revolution. How much time does this maneuver take? Divide 0.5 revolutions by the average angular ...

### English

1. Please prepare a pencil and an eraser before starting the test. 2. Please prepare for a pencil and an eraser before starting the test. 3. Please prepare a pencil and an eraser for me before starting the test. 4. Please prepare for a pencil and an eraser for me before ...

### Pre-Algebra please help me!!

X- 0 1 2 3 4 5 6 Y- -7 -4 -1 2 5 8 11 this is a x and y table I need to find out wat the rule is to get y. So the equation would start out like: Y=?????? wat do u need to do with x to get y? and I need help badly! so please!

### Math(Please help)

Evaluate: f(x,y)=2x^3e^y a) partial derivative with respect to x. I know that you have to treat y as a constant but I have no idea what to do. I do not understand partial derivatives at all. Please help!! b) partial derivative with repsect to y.

### Pictures Of HBC

Since I am doing an Ad on the HBC. Could I get links to pictures. I don't know what to draw, anything easy please. Like a beaver, a boat, could you please give me links to items the HBC sold?

### Please help math

suppose a triangle has an area of 10ft^2. IF the base of the triangle is 1 foot longer than the height of the triangle, what are the lenghts of the base and height? please help and show work so i understand how to do it

### Physics

This is a pretty simple physics problem, but I do not know how to go about it. How do I: Show that the time required for a projectile to reach its highest point is equal to the time for it to return to its original height?

### Physics

would it be possible to view your body from head-to-toe, while standing in front of a plane mirror that is only as tall as you? this is in the chapter mirror on my physics books

### Physics

A mass (m) rest on a frictionless slope within our physics lab room. The angle of the ramp with respect to the floor is 35 degrees. What is the magnitude of the mass's acceleration?

### Physics

A mass (m) rest on a frictionless slope within our physics lab room. The angle of the ramp with respect to the floor is 35 degrees. What is the magnitude of the mass's acceleration?

### college (Physical Science/Physics)

I am having difficulty with this equation. I have been working with it for several weeks! Please Help. the equation is this: solve for Lf Lf=[(CwMw+CsMs+CcMc)(To-Tf)//Mi-CwTf values Cw=1.00; Mw=143.4; Cs=0.11; Ms=30.0; Cc=0.22; Mc=57.7;To=23.9; Tf=14.2;Mi=16.7 I keep comming ...

### Physics- Elena please help!

An accelerometer in a control system consists of a 2.42 g object sliding on a horizontal rail. A low-mass spring is connected between the object and a flange at one end of the rail. Grease on the rail makes static friction negligible, but rapidly damps out vibrations of the ...

### PHYSICS

A train engine pulls out of a station along a straight horizontal track with five identical freight cars behind it, each of which weighs 88.0 kN. The train reaches a speed of 13.0 m/s within 6.50 min of starting out. Assuming the engine pulls with a constant force during this ...

### Physics

The fastest recorded pitch in Major League Baseball was thrown by Nolan Ryan in 1974. If this pitch were thrown horizontally, the ball would fall 0.809 meters by the time it reached home plate, 18.3 meters away. How fast was the pitch? So for i know that change in y ...

### please check this Physics

A 5kg block slides along a frictionless surface at 8 m/s toward a second block that is 2kg and attached to the end of a spring,The spring has a constant of 250N/m . When the blocks collide they stick together. What is the speed of the two blocks immediately after the collision...

### Physics , static fluids

A particular object weighs 313 N in air and 264 N when immersed in alcohol of density 0.70 g/cm3. What is the volume (in L) and the density (in kg/m3) of the object? I had origionally used the 264N as the force of buoyancy and did the Fb=density*volume*g, then solved for ...

### physics help 4 please!!

Two turtles (each 2 kg) sit on an approximately massless branch in the water. They sit on opposite sides of the branch's center, each 3 m away. The branch (10 m long) is spinning at 2 rad/s about its center (nearly without friction). Now, if both turtles walk to the ends of ...

### PHYSICS - ONE MORE QUICK QUESTION

PLEASE SEE ADDITIONAL QUESTION AT BOTTOM. A pendulum was set up and measurements were made to enable the mechanical energy to be calculated at the start position S and the lowest point of the pendulums swing L. The mass of the pendulum bob was determined on an electronic scale...

### geometry PLEASE

imageshack(.)(us)/photo/my-images/42/2vja.jpg/ Open that link please , just delete the parentheses please please help me with my assignments I beg you cooperate with me huhu 1. in the figure , the areas of traingle cef, triangle abe, triangle adf are 3,4, and 5 respectively. ...

### Math

At a fair run by a local charity organization, it costs 50 cents to try one’s luck in drawing an ace from a deck of 52 playing cards. What is the expected profit per customer, if they pay $4 if and only if a person draws an ace? The probability of drawing an ace is 4/52 or 1...

### math

Claire wants to determine how brightly to illuminate her stage. stage width (in metres) x stage length (in metres) x 0.14 = total watts for stage If her stage is 7.25 metros wide and 11.5 metres long, a) calculate the exact number of watts needid to illuminate the stage b) ...

### Math

Claire wants to determine how brightly to illuminate her stage. stage width (in metres) x stage length (in metres) x 0.14 = total watts for stage If her stage is 7.25 metros wide and 11.5 metres long, a) calculate the exact number of watts needid to illuminate the stage b) ...