Weighing Definition and 90 Threads

a concrete block weighing 20,000 lb is supported by 2 STEEL rods, rod AB has an area of 1 in and rod CD has an area of 2 in... what is the elongation of each rod...? http://s44.photobucket.com/albums/f46/maximus11373/?action=view&current=untitled.jpg&newest=1i don't know how to start, should i...

hi, if we drop a piece of meat say 1kg from 1m above the plate, on a plate 2kg, and the plate is on a weighing scale of spring F=kx, how do we find how much the spring will first compress? ( not referring to the equilibrium where total weight = spring force) so we can't use F=kx = mg here...

Not sure about this one, any help? Two men want to carry a wooden beam weighing 200 lbs which is 20 feet long. Both men are equal height however one is stronger than the other and wishes to bear 50% more the weight. How far from the end of the beam should both of the men be to make this possible?

Homework Statement A piece of iron weighing 85.65 grams was burned in air. The mass of the iron oxide produced was 118.37g. 1. Use the law of conservation of mass to calculuate the mass of oxygen that reacted with iron. 2. use the molar mass of oxygen to calculate the number of moles...

what is the required force to start moving a sliding door weighing 100 kg with two rollers. what are the forces acting on the system? shall i used rolling friction on this? what formula to use? thanks a lot.

So I just graduated from high school and am heading to college with the intention of getting a BS in physics. I took a semester of programming in Pascal my senior year, but had to drop the class the second semester (to get a freakin' art credit to graduate. God**** arts...), so I didn't learn...

Lets say you take a ladder and put it on a scale and measure it's weight while balancing it vertical. If you then lean the ladder at varying angles against a wall, would the scale's reading remain unchanged? I take it that it would, but for some reason this seems odd to me. Lets say the...

Need help:Weighing yourself in the elevator-acceleration problem Homework Statement If you stand on a spring scale in your bathroom at home, it reads 600N, which means your mass is 60kg. If instead, you stand on the scale while accelerating at 2 m/s^2 upward in an elevator, what would the...

What is the reading on the scale for the first one?? My friend mentioned that upthrust need not be considered as its an 'internal force', i wonder why?? Shouldnt' the net force dowards be (Weight of stone - pVg) + (Weight of water + pVg) as the water experiences an equal an opposite downthrust...

How much weight if any, should be given to public opinion to scientific theories that are, let's say difficult to prove, and could have significance effects globally.

if our weight is 42 kg in a weighing machine , in reality is it more or less than 42 kg?

A coworker and I were passing time by asking stump the idiot questions. He asked the following question. "If you had a box that weighs five pounds empty and placed five pounds of bees inside the box and then shook the box to make all of the bees take flight within the box what would the box...

Homework Statement The force F (in pounds) acting at an angle θ with the horizontal that is needed to drag a crate weighing W pounds along a horizontal surface at a constant velocity is given by F= (μW)/(cosθ+μsinθ) Where μ is a constant called the coefficient of sliding friction between the...

At what point do you say spending x amount of money on fixing your car isn't worth it anymore? My 10 year old accord needs the front axle fixed, $300. And my radio is busted, so I bought a new head unit w/all wires for around $90.00. I couldn't take not having a radio anymore :rolleyes...

Please tell your opinion with reasons (if possible). I hope this will be important for those who do not have a good undergrad research experience Please consider all the factors including the demand, funding, research, jobs,...etc.

You have 12 balls, and a weighing machine with no standard weighs. One of those 12 balls is either lighter or heavier than the others. Spot the ball in 3 chances with the weighing machine.

so your company has built an enormous ship and it is being lowered into a large pool to test if it can float... another company has contacted you to buy your ship and they want to know how much the ship weighs... your company has spent all its money building the ship and you can't afford a...

im 21 and curently a security guard. my dad go hurt and i had to get a job straight out of high school to help support my family doing so putting my education on hold.My question is if the Bachelor of Science (BS) in Interdisciplinary Studies - Math and Physics at Ellis College online would be a...

Hi, I got hold of a set of kitchen weighing scales which are made of some ferromagnetic plate and my neodymium magnets. So the reading on the weighing scales increases as you bring the magnet near the weighing plate, as expected... they then reach a maximum just before you touch the magnets...

Hi all, I just wanted to get some peoples' opinion on a situation that recently occurred in one of my classes. This past Friday, in my Fluid and Thermal Engineering class, we had our second test of the semester. Our teacher was not there because he was out of town so a TA administered...

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?

Homework Statement Suppose you went to another planet having a larger radius than Earth but having the same total mass as Earth. Would this affect your weight? How? Homework Equations Not applicable...? I think. The Attempt at a Solution I don't really understand what radius and...

i give you 12 marbles. 11 of them are identical. the 12th one looks the same, but is either heavier or lighter than the other 11. you also have a balance scale. the kind that weighs things on both sides - and if one side is heavier, it tilts down. you are allowed only 3 weighings. tell...

Photograph: Elizabeth Ruiz/EPA http://www.guardian.co.uk/international/story/0,,2003489,00.html I should hope that he came by C section! Carol Burnett

I need to get a laptop in addition to my desktop computer for doing presentations/demos and general academic use--carrying it around all day every day in a backpack while cycling/walking a few miles. I'm still undecided. I am torn between a model from Sony's TX series--unfortunately I do not...

A box of books weighing 229 N is shoved across the floor by a force of 455 N exerted downward at an angle of 35° below the horizontal. (a) If µk between the box and the floor is 0.57, how long does it take to move the box 5 m, starting from rest? (b) If µk between the box and...

How do you find the average value in an experiment when all it consist of is weighing a beaker and adding 10 mL of water three times to it?

The question is...Strictly speaking, you weigh less (tiny bit) when you are in the lobby of a massive skyscraper. Why is this so? I need help...I'm not asking for the answer...just some direction I'm confused because I thought the greater the distance from the Earth's center, the less...

beaker with water on a weighing scale... A weighing scale has a beaker of water on one side and a balancing weight on the other side. You put your finger into the water carefully without touching the beaker. Will the balance be upset? Which side will appear heavier, if so? What will...

Ýou have 12 balls. All of them have the same mass. Except one. You don't know if it weighs more or less than the other 11 balls. Your mission is to find the odd one out, and say if it weighs more or less than the 11 others. You have a balancescale. You may use it for three weighings. The...

you have 9 coins. one of these coins is faulty, that is it is either heavier or lighter than the rest. you have a weighing balance. in thre weighings you have to find 1. which is the faulty coin and 2. is it heavier or lighter.

How would I find the sensitivity and accuracy of electronic weighing scales?

i want to know Why sometimes is it more accurate to weigh liquids than to use a graduated cylinder to measure them??

So, I'm having trouble with the concept of the mass of a "system" being greater than the sum of the masses of the components of that system. Specifically in the case of photons. A system consisting of 1 photon has no mass. A system consisting of 2 photons in the same direction has no mass...

Perhaps some of you have seen this before A scale will report the difference, in grams, between the masses on the two sides, as well as telling you which side is heavier. So if you place 25 grams on the left pan and 27 grams on the right, you find out that the right side is heavier by 2...

Hey.. had a problem which am tryin to solve... During an ecology experiment, an aquarium half filled with water is placed on a scale. The scale reads 195N. a) a rock weighing 8N is added to the aquarium. If the rock sinks to the bottom of the aquarium, what will the scale read? b) The...

Alright, these two problems are driving me nuts: 1. ---To verify her suspicion that a rock specimen is hollow, a geologist weighs the specimen in air and in water. She finds that the specimen weighs twice as much in air as it does in water. The solid part of the specimen has a density of...

This was a bonus question on my astronomy homework, but my knowledge of basic physics is so incredibly limited that I am really struggling with it. It's bugging me because I'd just really like to know how this works. "Given that Jupiter has no solid surface, how could you weigh yourself on...

"Weighing the Graviton" 9^9 (387,420,489) Combinations/Equations http://physics.nist.gov/cuu/Constants/ [UPDATED 1998 CODATA-NIST VALUES] The Primary Universal Base Unit Values 1) mass… (hc/G)^1/2 = 5.4563026(39) x 10^-8 kg 2) length… (hG/c^3)^1/2 = 4.0507625(38) x 10^-35 m 3) time…...

Hi all! can somebody help me out in solving following 2 questions: 1. A man weighing 80 kg is standing on a trolley weighing 400 kg.The trolly is resting on a frictionless horizontal rail .If the man starts walking on the trolley along the rail at a speed of 1 m/s with respect to the...