Height Definition and 1000 Threads

1. To Find The Height Of a Room by an Experiment using Simple Pendulum MATERIALS REQUIRED A simple pendulum, metre scale, stop clock, bobs of different masses, wooden blocks, a long string which has greater than the height of the laboratory. INTRODUCTION The period of a simple pendulum...

Find the height or length of these of these natural wonders in kilometers , meters , and centimeters . (a)The longest cave system in the world is the Mammoth Cave system in Central Kentucky. It has a mapped length of 384 miles (b)In the United States , the waterfall with the greatest...

A 65.0 kg student climbs a set of stairs in 25.0 s with a power output of 95 W. What is the vertical height of the stairs? I came up with the formula: W=P x (delta t) W=95w(25.0s) 2375 Im not sure how this comes into play: W = mg (delta h) Im really confused :|

Homework Statement what is the flux entering a cone of radius r and height h located in a uniform electric field E parallel to its base? Homework Equations flux = E.ds The Attempt at a Solution

Hello; According to the GPE formula you gain gravitational potential energy as you go higher up (further from the centre of gravitation). Does this mean that your mass increases with distance? Thanks.

Homework Statement A 10-g bullet moving at 1000 m/s strikes and passes through a 2.0 kg block initially at rest as shown in the diagram. The bullet emerges from the block with a speed of 400 m/s. [PLAIN]http://img34.imageshack.us/img34/554/82265240.gif To what maximum height will the...

A 48 kg skier starts from rest at a height of H = 28 m above the end of the ski-jump ramp. As the skier leaves the ramp, his velocity makes an angle of 28° with the horizontal. Neglect the effects of air resistance and assume the ramp is frictionless. Could u give me a formula i need to start...

if an unlimited source of water was dropped twenty meters directly downwards into a meter cubed steel box through a hose, would there be the same psi in the box as there would be twenty meters under the sea?

Homework Statement The U-shaped tube in the figure has a total length of 1.0 m. It is open at one end, closed at the other, and is initially filled with air at 20C and 1.0 atm pressure. Mercury is poured slowly into the open end without letting any air escape, thus compressing the air. This is...

A 65.0 kg student climbs a set of stairs in 25.0 s with a power output of 95 W. What is the vertical height of the stairs? Im not quite sure where to start with this one?

Homework Statement A ball of mass m is launched at an angle theta from a spring gun of length D. The lower end of the gun, where the spring is attatched, is at ground level. The spring has spring constant k and an unstretched length D. Before launch, the spring is compressed to a length d...

Homework Statement Triangle ABC formed by two vectors a = ( 2, 10, 25 ) and b = ( 5, 4, -2 ) attached at a point A. The area of the triangle is (81 root 5) / 2 And I need to find the length of the height AM (AM perpendicular to BC and the point M belongs to the line BC). Don't know where to...

Homework Statement Two 54kg blocks are held 30cm above a table. As shown in the figure, one of them is just touching a 30cm long spring. The blocks are released at the same time. The block on the left hits the table at exactly the same instant as the block on the right first comes to an...

Homework Statement "The initial speed of a stone projected vertically upwards is 21.0m/s a)What is the maximum height it will reach? b) How long does it take to reach the highest point and what is the total time which it is in the air?" Relative information: a=9.8 m/s/s u=21.0...

Homework Statement A patient is to be given a blood transfusion. The blood is to flow through a tube from a raised bottle to a needle inserted in the vein. The inside diameter of the 4.07 cm long needle is 0.388 mm and the required flow rate is 3.90 cm3 of blood per minute. How high should the...

Hi, you no those pens, that you have to push the top down, which is loaded with a spring to use? Well I was wondering if I released it on my desk how high would the pen travel? I know that the spring PE=0.5kx^2 and the the spring force is F=Kx, but not sure were to go from there? Thanks James

Homework Statement Hey guys! I am doing a very simple lab, and in need of your expertise! Haha, I am an intro-physics student, please don't get too complicated with me, my knowledge is very limited. The QUESTION is: WHAT IS THE RELATIONSHIP BETWEEN EFFICIENCY VS HEIGHT...

Homework Statement A rock is thrown from the edge of the top of a building with an initial velocity of 12.2 m/s at an angle of 53 degrees above the horizontal. The rock strikes the ground a horizontal distance of 25 m from the base of the building. Assume that the ground is level and that...

Hi, I am calculating about Drive Brake system. Now I am stuck at Hg (I mean car's center gravity of height), I just don't know how to calculate it. Will anybody help me ? I am really need it I look forward to your reply Best Regards,

Homework Statement Your friend is 1.7 m tall. What is the height of her image when she is 4.2 m from you? Homework Equations I used di/do and multiplied that by the height of the friend The Attempt at a Solution I did (4.2/3.5)(1.7) but it was wrong. Not really sure what I'm...

Homework Statement An object is located 27.5 cm from a certain lens. The lens forms a real image that is twice as high as the object. b) Now replace the lens used in Part A with another lens. The new lens is a diverging lens whose focal points are at the same distance from the lens as the...

Homework Statement A) Determine the image distance and image height for a 5-cm tall object placed 10 cm in front of a concave mirror having a focal length of 15 cm. B) Determine the image distance and image height for a 5-cm tall object placed 45 cm in front of a concave mirror having a...

Homework Statement You are 1.9 m tall and stand 3.5 m from a plane mirror that extends vertically upward from the floor. On the floor 1.5 m in front of the mirror is a small table, 0.80 m high. a) What is the minimum height the mirror must have for you to be able to see the top of the...

See the diagram attached. I am trying to find the height marked with a red arrow to height where the ball on top is resting. Each ball has a radius of 1cm... How would you do this. I thought it may be something to do with the surface area or volume, do worked with the SA and Volume eauations...

Homework Statement Caution: Ignore the weight of the bucket itself. The bottom and the top of a bucket have radii rb = 15 cm and rt = 26 cm respectively. The bucket is h = 36 cm high and filled with water. Where is the center of gravity relative to the center of the bottom of the...

Homework Statement Hint: Disregard any dissipative effects of the atmosphere of the planet. A projectile is launched from the surface of a planet (mass M, radius R) with a launch speed equal to 61 percent of the escape speed for that planet. The projectile will rise to a maximum height...

Homework Statement A hole is drilled through the center of a ball of radius r, leaving a solid with a hollow cylindrical core of height h. Show that the volume of this solid is independent of the radius of the ball. Homework Equations V = \int_{a}^{b} 2\pi x (f(x) - g(x))...

Homework Statement A column of water contains fine metal particles of radius 20nm, which are in thermal equilibrium at 25°C. The density of the metal is 2\times10^{4} kg m^{-3}. If there are 1000 particles per unit volume at given height, what will the particle density per unit...

Homework Statement A projectile os launched with velocity of 200m/s at an angle of 45deg to the horizontal. Calculate: a) the maximum height reached b) the time of flight c) the range Homework Equations v^2=u^2+2as s=ut+1/2 at^2 The Attempt at a Solution I know the first 2 but...

How to determine the right height of the desk for you? Or does it not matter if the height of the chair can be adjusted?

Hey I wondered what the best way to proceed about fiding the maximum length of a projectile when fired at an angle relative to an incline. Would a coordinate axis along the incline be the best choice? Then I could solve the equations for when y = 0, but it would also result in an acceleration in...

Homework Statement A model rocket initially at rest on the ground is fired vertically upward, and the engine thrust produces a constant acceleration a = 40 m/s2. After running for 2.5 s the engine is cut off and then the rocket is in free fall. (a) Find the maximum height that the rocket...

Homework Statement A ball is projected horizontally from the edge of a table that is 1.02 m high, and it strikes the floor at a point 1.28 m from the base of the table. What is the initial speed of the ball? Correct, computer gets: 2.81e+00 m/s How high is the ball above the floor...

Homework Statement A 151 -tall diver is standing completely submerged on the bottom of a swimming pool full of water. You are sitting on the end of the diving board, almost directly over her. How tall does the diver appear to be? Homework Equations n1sin theta1= n2 sin theta2 ?? The Attempt...

Homework Statement Ball A is dropped from the top of a building of height 'h' at the same instant that Ball B is thrown vertically upward from the ground. When the balls collide, they are moving in opposite directions, and the speed of A is twice the speed of B. At what height does the...

Calculate change in height? I am working on a ballistic pendulum physics labs. I am trying to find the change in y(height) and bullet velocity. I ran the lab and received the following results: t (at max height (.780) in y= -.984 final y= -789 m(bullet)=.001 m(block)=.05 g=9.81 x in=...

Homework Statement An object is thrown vertically upward such that it has a speed of 47 m/s when it reaches two thirds of its maximum height above launch point. Find maximum height h. Homework Equations V^2-Vo^2 = 2gh or V^2-Vo^2 = 2g(1/3H)? The Attempt at a Solution Final...

Homework Statement I have to find the orbital height of a satellite with a specific g force (ie. the acceleration due to gravity). g=5.7(ms)2 Homework Equations So far I have been using the equation g=Gm/(r+h)2 to find the acceleration due to gravity, where G= gravitational...

Hi..A disk A and disk b are rolling without slipping with same speed on a horizonal surface..Disc a rolls up an incline and disk b rolls up an incline except that it is fricitionless! Which disk attains more height nw why?

Homework Statement Projectile A is launched horizontally at a speed of 20. meters per second from the top of a cliff and strikes a level surface below, 3.0 seconds later. Projectile B is launched horizontally from the same location at a speed of 30. meters per second. Approximately how...

Homework Statement Hello! I am an honors physics student and i have been assigned a project that has puzzled me. I have a container full of sand, a couple meter sticks, a tennis ball, and a stopwatch. What I need to do is prove something through the use of these items. What I am going to try...

Homework Statement A 32 kg cannon ball is fired from a cannon with muzzle speed of 1360 m/s at an angle of 44◦ with the horizontal. The acceleration of gravity is 9.8 m/s2 . What is the total mechanical energy at the maximum height of the ball? Answer in units of J. Homework Equations...

Hello guys! I need your help regarding Projectile Motion because I kinda novice here. I don't know where to start. These are the following given: Vi = 23.2 miles/hour h = ? x = 1 km Here's the situation it looks like, check this image that I created for you to understand...

Hello fellow physicists, I am seeking help on the following problem: A bicycle is moving over a speed bump at 6.9m/s. Calculate the height reached by the bicycle once it looses contact with the speed bump. Radius of the speed bump is 1.7m and mass of the bicycle is 83 kg. For this problem...

Homework Statement An entertainer juggles balls while doing other activities. In one act, she throws a ball vertically upward, and while it is in the air, she runs to and from a table 5.60 m away at a constant speed of 2.10 m, returning just in time to catch the falling ball. Homework...

Homework Statement What is the effect of increasing the height of the track on the acceleration of the object? Homework Equations The Attempt at a Solution The speed of the track was slower? is it correcT?thanks

So if you have a typical basketball "mens". http://en.wikipedia.org/wiki/Basketball_(ball ) so, my friends and I were in a hot tub and one brought in a basketball. They were pulling the basketball to the bottom of the hot tub and we noticed that it did not shoot out as high as when we...

Hi, everybody, I really hope you can help me out with this one. I work for an outdoor facility, and we were just replacing our zip cable. Due to major safty issues, we need to get it at the exact height it used to be at, and that's kind of tough. After a few trial-error sessions, we...

Homework Statement I have this problem on my physics exam and I hoped you guys could help. The Question is: Why is the relationship between the average velocity and the height of a ball rolling down a slope a square root function? The slope is 100cm long, the height of the ball at the top of...

Homework Statement Little Willy, clumsy clot, From window sill dislodged a pot. He shouts below to Little Milly: "Step aside, it'll knock you silly!" The window sill is 35.0 m above the sidewalk where Millly is standing directly below the falling pot. Milly is 1.05 m tall, her ears...