Table Definition and 894 Threads

Homework Statement Element X forms a chloride, XCln which melts at 3\circC. When 0.500 g of the chloride reacts with an excess of acidified silver nitrate, 1.19g of AgCl are formed. Another 0.500g sample of the chloride is heated strongly and chlorine gas is given off. When the residue is...

Hi all Basically, I'm looking for a fingerprinting or perfect hash function. The key is 40 alpha characters, specifically \b[A-Z_]{40}\b. The index is a 12-digit integer. The function must be deterministic, i.e. if a key maps to an index, it must always map to the same index. The...

I don't really know if this is an acceptable topic to be placing in a "Sciences" homework help forum. It's a problem I'm having in my Symbolic Logic class. Homework Statement Every sentence has a truth-table which can describe it, does every truth table have a sentence? We're dealing...

An object weighing 34.518379357 kg, free-falling at 4.2(?) m/s, travels 0.889m, before it begins decelerating when it makes contact directly on the top of a person's head. Within what I would guess would be perhaps maybe 2(?) milliseconds after deceleration commences, the first intervertebral...

[SOLVED] Two blocks - one on a table and one hanging - acceleration with friction Homework Statement h ttp://bildr.no/view/186531 that's a link to an image of the problem Block A (mass 2.25kg) rests on a table top, it is connected by a horizontal cord passing over a light , frictionless...

If an atom with more protons have tighter electron orbitals than atoms with fewer protons, why doesn't the "atomic radius" decrease up the periodic table? Instead it increases, why is this?

I don't know if I can get help here, but it's worth trying, I have to design a state table for a sequential circuit, the table looks like this P St Input N St Output A B X Y A B Z 0 0 0 0 0 0 0 1 0 0...

Hi all, I am confused of how to find the “TOTAL TOOTH-TO-TOOTH SPACING AND PROFILE ERRORS e”. My Professor want me to determine the ERRORS of a Spur Gear with gear diameter d1 = 420 mm and pinion diameter d2 = 65 mm and a gear module m = 8 and the AGMA Quality is No. 10. When I see the...

An infinitesimally thin rope is held on a frictionless table with one-fourth of its length hanging over the edge. If the rope has length L and total mass m (assuming uniform mass distribution), how much work is required to pull the hanging part back onto the table. U = mgh The length of...

Homework Statement \int xe^{2x^2} cos(3x^2) dx This is the hardest integral I've attempted so far. I've come up with an answer that fits a table in my book but I'm not sure if I arrived there correctly. Thanks for reading! Homework Equations \int e^{au} cos\ bu\ du\ =...

Hi, I got one table of four columns. e.g. Temperature, Field, Vhall and Vdrive. Table contains the 1000 rows. I am given the Vhall_maesured and Vdrive_measured values. I want to find out, which row in the table has the closest values for Vhall and Vdrive to corresponding...

Hi, I am trying to calculate how fast you could rotate a pool table (at constant angular velocity) without the balls moving. Assumptions used: coeffecient of static friction=0.3 table dimensions: 50in.X100in. So the farthest distance from the center is 111.8 in. I came up with about...

A 0.015-kg bullet traveling horizontally at 399.9 m/s strikes a 4.1-kg block of wood sitting at the edge of a table. The bullet is lodged into the wood. If the table height is 1.2 m, how far from the table does the block hit the floor? ________________________m

Homework Statement The vertices of a tilted triangle table are (0,0,9), (5,3,7), (4,7,6) and I need to determine where the a ball of mass m falls off of the table. There is no friction or outside forces. The ball is released from point (0,0,9). 2. The attempt at a solution I'm not sure...

Just curious, what do physicists usually take on top of the regular course work? Myself, being enrolled in chemical physics have the following time table this year: Organic Chemistry I & II Advanced Calculus w/ Vector Analysis Waves and Oscillations, then Electrodynamics Physical...

Homework Statement A popular pastime is to see who can push an object closest to the edge of a table without its going off. You push the 100 g object and release it 2.20 m from the table edge. Unfortunately, you push a little too hard. The object slides across, sails off the edge, falls...

NOTE: This is not homework, but if you feel it is in the wrong forum then move it. I didn't know a better forum that it could go in. I want to construct a table of results (minus the results for now) that is related to how the count rate on a geiger muller counter varies with distance with a...

[SOLVED] Block on a table Homework Statement http://img91.imageshack.us/img91/4285/fudgepq5.th.png I am having some trouble finding the acceleration of the blocks, can anyone help me? The weight of B is 6 lbs. The weight of A is 5 lbs. The friction coef is .3 Homework Equations The...

in the periodic table we have the density of each element ( density(Si) = 2.33), density(O)=1.429). i wonder how we could calculate the density of SiO2 ?

Homework Statement A spool with radius r and mass M sits upright on a table, a distance l from the edge. The string hangs off the edge of the table with a mass m attached. The table is frictionless: what will the velocity of the weight be when the spools center of mass reaches the edge of...

Homework Statement What information can i find on the periodic table of the elements and what does it mean Homework Equations What is anything. The Attempt at a Solution Atomic symbol, the big letter, for the element abervation. The elements name, for the elements name. Atomic...

1. When someone loops, and the person blocks, the ball goes out...if the ball really rides up the rubber, shouldn't it have backspin when it comes back? Since friction accelerates the spin. For instance, when I sidespin, the ball I get back is the continual motion of the ball, instead of its...

[SOLVED] Aeordynamics, drag, wind resistance - table with Cw values for objects Hello I am not using the standard template as this is a minor question in relation to my assignment, and not the actual questions from the assignment itself. I am calculating the curve of a projectile fired at...

Does anyone here know of a free periodic table (downloadable/printable) geared towards the needs of solid state? More specifically a table offering Lattice constants/crystallization systems, Mean Debye Temperatures etc. Ideally it would be a perfect copy of the periodic table featured by...

When I was in college years ago, I came across this test question: How will the periodic table of elements look like in another planet? Perhaps, it is asking for a general answer. Do you know if it will change the order of the elements?

A cue ball (mass=0.165kg) is at rest on a frictionless pool table. The ball is hit dead center by a pool stick, which applies an impulse of +1.50Ns (Newton-seconds) to the ball. The ball the slides along the table and makes an elastic head-on collision with a second ball of equal mass that is...

1. A chain is help on a frictionless table with one-fourth of its length hanging over the edge. If the chain has length L and mass M, how much work is required to pull the hanging part back on the table? i don't think i could have W = mgL/4 will the work change each time a new chain ring is...

A 0.5kg steel block rotates on a steel table while attached to a 1.2meter long hollow tube. Compressed air fed through the tub and ejected from a nozzle on the back of the block exerts thrust force of 4.0N perpendicular to the tube. The maximum tension the tub can withstand without breaking is...

Homework Statement A hollow spherical shell is rolling without slipping or sliding down a board that is tilted at an angle of 35.0° with respect to the horizontal. What is its acceleration? Homework Equations I=2/3mr^2 if an object rolls without slipping or sliding: v = rw...

[SOLVED] help- speed Mass m_1 on the frictionless table of the figure is connected by a string through a hole in the table to a hanging mass m_2. With what speed must m_1 rotate in a circle of radius r if m_2 is to remain hanging at rest? i know i am suppose to show what i have done...

Hi I need help with a question in a Fire Safety course I'm studying for. The question reads : Define the following terms and indicate the units in which they are normally expressed. State how low numerical values for these properties would affect the ease with which solid materials can...

Homework Statement A block of mass m1 on a rough horizontal surface is connected to a ball of mass m2 by a lightweight cord over a lightweight frictionless pulley as shown. A force of magnitude F at an angle theta with the horizontal is applied to the block. The coefficient of friction...

Well, I have read a thread regarding a table tennis paradox and I wondered why a top spin ball will dive faster. I have a question here: Does the direction of air flow will affect the ball whether it will float more or dive faster? I mean if the ball spins in the opposite direction of air...

A paradox of the table-tennis ball? Some friends my argue about the ball spin and curve. At first I thought it can be explained by bernoulli effect. But I can see a paradox here. When the ball is top spin, it will dive faster, while the upper part is moving faster than the lower part (see...

Homework Statement Consider the system shown in the figure. Block A has weight w_A and block B has weight w_B Once block B is set into downward motion, it descends at a constant speed. Calculate the coefficient of kinetic friction between block A and the table top. A cat, also of...

2-D kinematics[solved] Homework Statement A ball rolls horizontally off the edge of a tabletop that is 1.90 m high. It strikes the floor at a point 1.57 m horizontally away from the table edge. (Neglect air resistance.) (a) How long was the ball in the air? (b) What was its speed at...

Hi, I am trying to write a program on a C compiler and I am not too sure how to do it. The question asks to write a full program to calculate the squares and cubes of the numbers from 0 to 10, which uses tabs (\t) to illustrate the data in the table. Click on the uploaded document to...

Inclination of a Table-PLEASE HELP A physics student playing with an air hockey table (a frictionless surface) finds that if she gives the puck a velocity of 3.80 m/s along the length ( 1.67 m ) of the table at one end, by the time it has reached the other end the puck has drifted a distance...

In the drawing, the weight of the block on the table is 466 N and that of the hanging block is 205 N. Ignore all frictional effects, and assuming the pulley to be massless. the drawing is of two blocks, one on the table, one hanging off. connected by a pulley. the question asks for...

This just crossed my mind. The downward force of magnitude from gravity is longer than the upward force of magnitude from the table. Which explains why the downward force of magnitude, the 5 N, comes from gravity. Am I right?

[SOLVED] Counting Seating Arrangments of Couples at a Round Table I'm reading this example in my probability book which is I'm not understanding. It says: There are 19! ways of arranging 20 people around a table. The number of arrangements that result in a specified set of n men sitting next...

Hello there, I'm trying to help someone with a physics problem. So this is what he described: "(01:01:49) ka0s1337the0ry: if she gives the puck a velocity of 4.6m/s along the length (1.75m) of the table at one end (01:01:53) RAMEN 3bun BR: are you going to be a freshman in high school...

Homework Statement Construct a cayley table for U(12) Homework Equations No equations necessary for this kind of table The Attempt at a Solution I could construct a cayley table , but I have no idea how to determine what elements are in U(12). What method would you apply hear...

Hey all, if a cue ball moving at a certain velocity collides with the side cushion generally the ball will not deflect at a nice angle as the ball would compress into the cushion due to the elasticity of the cushion and energy loss of the ball to the cushion would be reduced. Using Hooke's...

Homework Statement The equilibrium constant for the esterification of benzoic acid with methanol is 3. Calculate the theoretical yield of benzoate expected using 0.082 mol of PhCO2H and 0.62 mol of CH3OH. I just need my work checked. Homework Equations See below. The Attempt at a...

Hi all. Wikipedia states: "The [Jarque-Bera] statistic has an asymptotic chi-square distribution with two degrees of freedom and can be used to test the null hypothesis that the data are from a normal distribution. The null hypothesis is a joint hypothesis of both the skewness and excess...

Hi, Anyone please help me out to create a table by AutoCAD 2000. Thank you very much! Mike

Homework Statement Use the periodic table to write the electron configuration of Gd. Homework Equations The Attempt at a Solution Gd has 64 electrons (atomic number 64) so I would assume that the configuration would be: 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 4f8 5s2 5p6 6s2...

Nowhere in my notes does it say what Eθ is and i can't find a definition of it on the internet :confused: I'll give you the context: For group 2 of the periodic table, state and explain the trends in the following for their elements: (i) redox property, related to Eθ value

So I'm building this glass table, and I'm going to put a few led's around the edges so i can light up the table if i need to find something in the dark (like while watching a movie). and I want a cool way to turn on the light, so I was thinking about making a circuit that when you tap the table...