Height Definition and 1000 Threads

I'm under the impression that this takes special equipment? We're talking centimeter precision by the way. Shouldn't I be able to get this from some App by now?!

Homework Statement Identical resistors, R, make up the legs and rungs of a resistive ladder of infinite height. Find Req (equivalent resistance) of ladder, measured between points A and B. Homework Equations The Attempt at a Solution Here's my thought process: First make all...

I'm trying to solve a seemingly basic question but it seems to be taking me towards some advanced dynamics that is over my head. Any help would be appreciated. (If it matters, this is not a homework problem - I am simply curious about the answer and how to solve it.) Homework Statement...

Homework Statement The Attempt at a Solution I used conservation of momentum for the initial velocity of mass 2, and conservation of mechanical energy for the movement from rest to highest position, KE=PE. The answer that I received is selected in the screenshot. However, when the...

Homework Statement A cannon ball is fired with a velocity of 30m/s at an angle of 35° from the top of a cliff. The height of the cliff is 50m. Calculate total time of flight of the cannon ball before it hits the ground. v_o=30m/s \alpha=35° g=10m/s^2 Homework Equations The...

Homework Statement Please see picture attached. Homework Equations The Attempt at a Solution If I use the pythagoras formula with the ratio I get the height as 3 yet it is longer than the side that is 4. Am I doing something wrong? Thanks.

Homework Statement ball thrown horizontally from roof of building 55.0m tall and lands 29.7m from the base. find balls initial speed Homework Equations (√acceleration/[√2*55] ) * 29.7=8.86 The Attempt at a Solution (sqroot acceleration/[2*55] ) * 29.7=8.86 the answer is...

Homework Statement A student standing on top of a cliff drops a rock down below into the water and hears it splash 3 seconds later. The speed of sound is 330m/s, what is the height of the cliff Homework Equations v= d/t v2 = v1 + at d = v2-1/2 at2 d = (v1 + v2)t v2 squared = v1...

I need to calculate a lions mass and all i know is the height and mass!

Homework Statement http://www.scribd.com/doc/82645310 In Figure 3-31, the lines AB and CD are the center lines of two conduits 1 ft. and 2 ft. in diameter respectively. Determine the maximum value of z so that the two may pass without interference. Conduit CD must pass under AB...

Homework Statement i need to find the work of gravitational attraction based on heights of balls being shot into the air. the mass of the ball is 24 grams, the height is 27cm at 0 degrees, 38 at 30 degrees, 50 at 45 degrees, 61 at 60 degrees, 80 at 90 degrees. i also need to find the initial...

Homework Statement A ball of mass 0.5kg is dropped from a height of 5m what is the greatest velocity it will have just before hitting the ground? Homework Equations f=m*g a= change in velocity/change in time The Attempt at a Solution m=.5kg h=5m a=9.8m/s f=m*g f= .5*9.8=...

Homework Statement a golf ball is shot from a height of 6.5 ft above the ground at an angle of 45° above the horizontal. The ball lands 39 ft and 3 inches downfield. Assuming ideal projectile motion find: a. Initial velocity b. flight time c. maximum height Homework Equations r =...

Homework Statement As you look out of your dorm window, a flower pot suddenly falls past. The pot is visible for a time t, and the vertical length of your window is Lw. Take down to be the positive direction, so that downward velocities are positive and the acceleration due to gravity is the...

At the top of a "frictionless" loop that is 75 cm high, a 75 Kg ball bearing is traveling at 1.9m/s. From what height was the ball released? I have absolutely no Idea where to start here. Diameter= 0.075m Velocity=1.9m/s Force related to Gravity=0.74N m=0.075Kg

Homework Statement Thank you first off for your help. Currently, I am working on a lab for my University Physics class and I am lost on how to do this integration. We weight (from a scale) and time measurements going up and down in an elevator. Using that data we are supposed to get the...

hi guys. new here, i need help finding the maximum height, i saw my question was posted before here i am still confused and not able to do the problem

A FAQ is why the spacetime interval has a minus sign. A geometrical answer is that the interval is always the shortest path (the straight line) between two points. If we talk about spatial points, that interval is the hypotenuse of a right angle triangle, whose sides are the projections of...

Last problem I can't get around.. Homework Statement A ball is thrown upwards at some velocity. 2 seconds later the ball is caught 10m up on a building. What is the highest possible height of the ball? Homework Equations X_f=x_i+V_x(t)-(1/2)(9.8m/s^2)t^2 (where X_f=10)...

Hi all, I am quite new to the topic of solitary waves. All I know is that somehow equations like the KdV equation give solutions to predict the behaviour of solitary waves. I have read in a couple of places that the velocity of the wave is proportional to the wave height. I am wondering...

Homework Statement A roller coaster starts at rest from a height of 110m and accelerates down the track to a height of 10.0 m. Find the speed it can each, assuming there is no friction Homework Equations Eg = mgh v = sqrt(2Ek/m) The Attempt at a Solution Honestly I'm not sure...

Does anyone know the highest altitude the biggest industrial grade weather balloon can go?

Homework Statement An open ended can, with height 0.3m is filled with air (P = Patm ~ 100kPa) and is submerged (open end downward) 3 metres below the water surface (bottom of can 3m below while top of can is 2.7m below). The pressure above the water's surface is also Patm. The air is...

Homework Statement During the first 50 s of a rocket's flight, the rocket is propelled straight up, so that in t seconds its height s is s(t) = t^3/sqrt 10 ft. a) How high does the rocket travel in 50 s? b) What is the average velocity of the rocket during the first 50 s? c)What is the...

Homework Statement A frustum of a right circular cone with height h, lower base radius R, and top radius r. Find it's volume. Homework Equations We are currently learning the Method of Washers and the Method of Cylindrical Shells so I believe we are supposed to use this somehow. The...

If I wanted to make a graph of height versus time for an object under the effects of air resistance av+bv^2 and thrown with a given initial speed, how would I go about doing that? I was also hoping to get a y versus x graph for a projectile under the same drag, but I presume I could find x...

Homework Statement If you toss your little cousin straight up into the air at 5 m/s, how high above your hands will he/she go? 0.5 m 1.3 m 2.0 m 70 m Homework Equations d = (0-5^2) / 2 (-9.8) d = 1.3 m The Attempt at a Solution My cousin will fly 1.3...

Homework Statement Starting from the barometric formula for a thin, isothermal atmosphere, show that the ratio of the pressure P(z2) at height z2 to the pressure P(z1) at height z1 is given by P(z2)/P(z1) = e(-(z2-z1)/y) where y is the scale height Homework Equations Barometric formula: P(z)...

Homework Statement A person standing on a bridge overlooking a highway inadvertently drops an apple over the railing just as the front end of a truck passes directly below the railing. If the vehicle is moving at 55km/h and is 12m long, how far above the truck must the railing be if the...

Homework Statement It’s your lucky day! You have been chosen by NASA to be the astronaut for its first intergalactic expedition. In your excitement for the mission, however, you forgot to read the road map and you have no idea where your spacecraft landed. Your intimate knowledge...

I know, I'm an absolute idiot for even letting that happen but it did. It fell off the sofa armrest accidentally (why would I want to throw it anyway? also, the armrest is larger than most) and quite surprisingly, there doesn't seem to be any noticeable damage to it. The webcam seems fine too...

Hey, I came across this question in my textbook, and there isn't an answer for it in the back, so I would just like to check if I have my head around it. The question is: 2 projectiles are launched at the same angle. Projectile 1 reaches a max height of twice that of the projectile 2. What...

a 59 kg pole vaulter falls from rest from a height of 4.7 m onto a foam rubber pad. the pole vaulter comes to rest 0.34 seconds after landing on the pad. calculate the athlete's velocity just before reaching the pad. calculate the constant force exerted on the pole vaulter due to the collision...

Hardhats are tested by dropping a 3.63 kg steel ball (free fall) from a height of 1.52 m and allowing it to impact the top of the hardhat. Hardhats are impacted with an impact velocity of 5.5 mps. The hardhats are supported at four locations where they are connected to a circular band that...

Homework Statement A ball is thrown upward. What is its maximum height? Its initial vertical speed is 10.8 m/s and the acceleration of gravity is 9.8 m/s^2 Neglect air resistance. Answer in units of mHomework Equations dfinal=dintial+vfinalΔt+ 1/2averageaccelerationΔt^2 or...

Homework Statement A basketball player achieves a hang time of 0.978 s in dunking the ball. What vertical height will he attain? The acceleration of gravity is 9.8 m/s^2 Answer in units of mHomework Equations ? The Attempt at a Solution 9.8/0.978^2= 10.245 Homework Statement Homework Equations...

1. Homework Statement A block given an intial velocity of 2m/s up a frictionless inclined at 60 degrees to the horizontal. What is the highest point reached by the block? 2. Homework Equations gsin(θ)=a a=v/t d=vit + 1/2at^2 3. The Attempt at a Solution Found vx = vsin60=...

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Homework Statement A 50-kg object was dropped from a height of 2 meters from water level of tank. The open water-tank has a hole 3 meters below water's surface. area of water tank is 1.5 sq m and diameter of hole is 2 sq mm. What is the max speed of water exiting the tank if the mini impact...

We solved this in class 4 months ago but I just can't remember the solution, or even where to start. I remember rearranging an equation. If an object is dropped from a height and it takes T seconds to hit the ground, how long will it take if dropped from four times the height? Possible...

Homework Statement In a ship of 10000 tons, the breadth of whose deck is 20 m, a mass of 50 tons is moved from one side to the other causing the bob of a plumb line 10 m long to move over 20 cm. Find the metacentric height? Homework Equations The Attempt at a Solution I don't...

A large open tank, shown below, contains water at a height H. The water is allowed to flow out through a pipe whose cross-sectional area is A. The pipe has a nozzle at the end, whose area is a. Assuming frictionless flow, determine (i) the height h to which the water rises in the piezometer...

Homework Statement A cylinder with radius five has water in it. The water flows out of the cylinder with a rate of 5π units cubed per minute. At what rate does the height of the fluid in the cylinder change? Homework Equations volume of a cylinder = πr^{2}h The Attempt at a Solution...

a small object with mass m=10gr is thrown vertically upwards from the surface of Earth with a velocity v=10m/s i need to find the max height(Hmax) (when v=0) and the time(tmax) when the object reaches the max height by using Newton's second law only. (ignore the effect of air and air...

http://a6.sphotos.ak.fbcdn.net/hphotos-ak-ash4/388044_10150449591037412_816037411_8386849_1415117382_n.jpg Homework Statement A ramp system is set up. Due to friction the ramp has an efficiency of 82%. Two cars of equal mass are allowed to collide and car 1 starts from rest at height h1...

I am designing a water pipeline from tank A to tank B. assuming tank B is empty, how can i calculate the water height going out from the pipe?

Homework Statement With a lens with f = 25 cm, we want to project an image that is 5 times bigger than object, so M = 5 - Find the image distance s' - Find the image height Hi Homework Equations 1/f = 1/s + 1/s' M = s'/s = Hi/Ho With: f = focus distance of lens M =...

Homework Statement A 1.0--tall cylinder contains air at a pressure of 1 . A very thin, frictionless piston of negligible mass is placed at the top of the cylinder, to prevent any air from escaping, then mercury is slowly poured into the cylinder until no more can be added without the cylinder...

Homework Statement a baton twirler throws a baton straight up in the air, it goes up and comes straight back down. it completes 4 rev. ignoring air resistance and assuming the angular speed is 1.80 rev/s , determine the height to which the center of the baton travels above the point of...

dear guys, can you explain to me how to solve the problem below :- kindly refer the attached file. your help is much appreciated. regards, zainul