Weight Definition and 1000 Threads

Homework Statement Show that, owing to the rotation of the Earth on its axis, the apparent weight of an object of mass m at latitude λ is : m((g-ω^{2}Rcos^{2}λ)^{2}-(ω^{2}Rcosλsinλ)^{2})^{1/2} where ω is the angular velocity of the Earth and R its radius. The first space travellers to reach...

Hi everyone , I have a small question .. I have attached a ppt . I am having two sensors which can measure the weight of my object at two end position so fmy support .. My question is that can i find the angle beta if am having the value of X kg and Y kg .. your answers would...

Homework Statement The drawing shows a lower leg being exercised. It has a 49 N weight attached to the foot and is extended at an angle θ with respect to the vertical. Consider a rotational axis at the knee. a. When o θ = 90.0 , find the magnitude of the torque that the weight...

i was wondering about counting velocity only from weight mass and from kilogram force (like force from rocket thruster) ex: there's a rocket in space, its weight is 63 metric tons and the rocket thruster output is 128 tons. i won't include the G force, cause i want to look the velocity when...

One of the examples I was looking at had to do with diffusion of hydrogen in a Pb sheet. There is a constant concentration gradient applied, so the hydrogen is constantly diffusing. We are able to determine the concentration of the Pd matrix. We further know the atomic weight percentages of the...

Homework Statement A canoe of mass 38 kg lies at rest in still water. A man and a woman are at opposite ends of the canoe 4.0 m apart and symmetrically located with respect to the canoe’s centre (which is also its centre of mass). The mass of the man is 65 kg and the woman’s mass is smaller...

I need help determining the weight, in pounds, of a volleyball-sized sphere comprised of pure titanium. I can provide the following facts necessary for the equation: Assume the circumference of the sphere is 65 centimeters. Assume the sphere is solid, not hollow. Titanium has an atomic...

Homework Statement The numbers aren't important because I'm after getting a more intuitive sense of the problem. When an elevator is accelerating upwards with a mass in it on a scale. Why is the apparent weight the normal force? Homework Equations F=ma W=mg The Attempt at a...

I read that a C12 atom has an atomic mass unit of 12 amu's. A C12 atom has 6 protons, 6 neutrons, and 6 electrons. If the mass of a proton is 1.00728 amu, the mass of a neutron is 1.00867 amu, and the mass of an electron is .000549, how can it's total amu be 12...

Homework Statement A 700 kg crate is on a rough surface inclined at 30°. A constant external force P = 5600 N is applied horizontally to the crate. The force pushes the crate a distance of 3.0 m up the incline, in a time interval of 7.3 s, and the velocity changes from v1 = 1.4 m/s to v2 = 2.5...

Homework Statement I have to design a scale to weigh something under 1kg and all am given is a yard stick, 10 ft of fishing line, a 500g known standard mass, and a protractor. Use an angle measurement for weight. Don't just balance weights on a see-saw Homework Equations - The...

Homework Statement A ferris wheel with a radius of 14.0 m rotates at a constant rate, completing three revolutions in 50.0 s. What is the apparent weight of a 60.0 kg passenger when she is at the top of the wheel? Given choices: 532 N, 452 N, 562 N, 625 N, 469 N Homework Equations...

I'm looking to design a range of diesel engines for use in road cars (for when i win the euro millions ;) , consisting of a flat 4, straight 6 and v8. all with a cylinder capacity of 666cc (per cylinder). As we know the biggest downfall of diesel engines is the weight, especially that of the...

I am trying to figure out the torque vs weight relationship. I am working on a software project where I want to create an application to determine the maximum payload on vehicle with rubber tyre on asphalt road. I am having three parameter 1. Torque 2. RPM 3. Diameter of tyre based on...

Homework Statement Assuming the person weighs 980 N on the surface of the Earth, how would you use ratios to obtain the weight of a person at 128 000 km above the surface of the Earth. Homework Equations Fg is proportional to 1/d2 The Attempt at a Solution The answer in the...

It's hard to do the Relevant equations & The attempt at a solution as I know very little in physics. So I'll stick with the 1st part of template. Homework Statement Attached is a drawing of the basics of my issue. It's a stack of planks at 45° with 45° wedges, making the former snug the...

I am building a prop for Aladdin's floating carpet. It will be a see-saw with the 2 characters on the carpet 300 lbs, 5 ft from fulcrum. 1500 ft lbs pressure. My question is how do I build a fulcrum 3 ft high, must have small footprint and movable. What is the torque on the pivot point,? how...

im trying to calculate the drop force of falling object. we do drop test at my work and believe the figures are wrong. we drop a 24.75lb weight from different heigths to check parts . they have it now set that dropping the given weight from 1 ft only produces 24.75 ft/lb force and they add 24.75...

First, I am not an electrical engineer and am not to familiar with circuit boards. PROJECT: I have a static load, represented by a block. The block has three very short legs (or feet 3/8" diameter each). The feet are located concentricly under the block. Under the feet I place three thin-film...

what is the approximate weight of brake system used in cars? will disc brakes increase the weight?

hi guys I want to know What is the mulitiplicity or statistical weight g of an energy level ? please, indetails

Homework Statement Given the reaction: 2LiHCO_3 + SiO_2 \rightarrow Li_{2}CO_3 + SiO_2 + CO_2 + H_{2}O where SiO_2 is unaffected, the mass of the 2LiHCO_3 + SiO_2 is 9.62 g. and Li_{2}CO_3 + SiO_2 is 6.85 g., find: a) mass loss due to CO_2 + H_{2}O b) mass of LiHCO_3 in the original...

Hello all. I am now enrolled at VRI at WWU! I am working on a sort of independent study project. I am making a V12 out of a pair of motorcycle engines to go into a VW based kit car. I have run the IHP formula and come out with 250hp, and 220 lb/ft of torque. The car weighs 1800 pounds...

I have designed a test apparatus where I can apply known bending and torsion loads to thin sheets of foamed plastic. All test samples will be identical sized sheets with various treatments to improve stiffness..with the added weight of the treatment recorded. I will use the information to...

Homework Statement Two blocks, each with weight ω, are held in place by a frictionless incline. In terms of ω and the angle θ of the incline, calculate the tension of the rope connecting the two blocks. Homework Equations ƩF=ma The Attempt at a Solution Since it is on a tilted...

Hi All, I use commercial quantum dot from evident tech, and from the datasheet I can know its molecular weight (Mw), my question is, is this Mw also includes the organic ligand or only consider its core? what is the normal case? thanks, Yuliar

I have and as I said, I am on some version of the diet myself, though not for weight loss purposes. In rankings of Diets *generally* Atkins rates very low. The weight loss effects from Atkins are mostly due to the fact that carb restriction is a good way to lower calories. So it amounts to a...

Hi, first time poster, sorry if this is in the wrong area or has already been asked. I'm looking at a situation like this: except that instead of being lifted via hydraulics, a crane will be attached to one end. The other end will be attached to a concrete slab via a flange, so that it does not...

I Found that my body weight with shoes is found less than the sum of ( body weight without shoes + weight of shoes ). example : Weight of body is A and Weight of shoes is B Human weight wearing shoes is C I Found that C > ( A + B )...

1. What must the charge of a 1.45g particle be for it to remain stationary when placed in a downward-directed electric field of magnitude 650N/C? Homework Equations E = \frac{F}{q} The Attempt at a Solution So the field is pointing downwards. E fields point in the direction a...

Homework Statement On an airplane's takeoff, the combined action of the air around the engines and wings of an airplane exerts a 8240-N force on the plane, directed upward at an angle of 75.0° above the horizontal. The plane rises with constant velocity in the vertical direction while...

Homework Statement How much does 1m3 air (oxygen) weight with 10 bar pressure at 0 degrees celsius? Homework Statement 0 degrees Celsius = 273.15 kelvin The Attempt at a Solution I saw this formula on another thread: 1 atm = 101,325 pascals ~ 1.2 atm = 121,590 pascals 27oCelsius = 300.15 K...

Here is the original question, i know the first answer as 182mm A square section cantilever beam, 3 m in length, carries a concentrated load of 10 kN at its free end. If the maximum bending stress is not to exceed 30 MPa determine the minimum dimensions of the section. Ans 182mm, What...

Homework Statement 1. You have been asked to test a new device for measuring the weight of tissue samples. The device consists of two light wires attached at one end to a support. A small container is attached to the other end of each wire. Initially each container hangs straight down. The...

Homework Statement There's a stick with a weight at the end standing straight up and I touch it slightly so it falls over. The stick is massless, the weight is 20kg and the length of the stick is 0.5 meters. How long will it take for the weight at the end to hit the ground? Homework...

Homework Statement The air in a room measuring 8 ft x 9 ft x 12 ft is at 80°F and 1 atm. Determine the mass of the air, in lb, and its weight, in lbf, if g = 32.0 ft/s2 Homework Equations 1 °F = 460.86°R dair = mair/vair The Attempt at a Solution The air has the same mass as...

Homework Statement 20. A container of water is sitting on a scale. Originally, the scale reads M1 = 45 kg. A block of wood is suspended from a second scale; originally the scale read M2 = 12 kg. The density of wood is 0.60 g/cm^3; the density of the water is 1.00 g/cm3 . The block of wood...

Homework Statement A person whose mass is 150lb weighs 144.4 lbf. Determine a) the local acceleration of gravity, in ft/s2, and b) the persons mass, in lb and weight, in lbf, if g = 32.174 ft/s2 Homework Equations F=ma The Attempt at a Solution A) Using F=ma I got 144.4 lbf =...

Today an interesting question came to my mind... I have heard that when is a conjunction of planets to Earth, it affects our weight. If the conjunction occurred at larger planets to Earth - Jupiter, Saturn, Uranus, Neptune (in one line with Earth) - how it affects our weight? Surely we will...

Hi. I was asking myself the following question. What happens if I have a fluid at rest inside a container, and I introduce my finger in it without applying any force to the walls? Will the weight of the whole system change? My intuition says no (If I don't exert a force on the fluid this...

Homework Statement On the earth, an astronaut and the equipment weigh 1,960 N. Weightless in space, the motionless astronaut and equipment are accelerated by rocket pack with 100 N thrust, that fires for 2.0s. What is the resulting final velocity? (Hint: First calculate the acceleration...

Hello, I’m currently working on a project in which I need to know the weight distribution in the four tires of a car at all times. I was thinking to install strain gauges somewhere in the chassis, or displacement sensors by the suspension. However I don’t feel these methods will give me...

Hi all I am doing a university module on vehicle dynamics and wish to clarify/enhance my understanding of vehicle handling and the effects of weight transfer. Here are a points based some past exam questions and my answers, if anyone can spot a mistake or would like to add anything this would...

hi pf, my friends asked me a strange question to me today, "if in a vacuum chamber if light is somehow focused on a suitable weighing machine then will there be any deflection? if yes does that mean light has mass? " sounds strange, isnt? that why i choose to ask here?

dss Homework Statement In Rendezvous with Rama, they are on rung 700, so about 213 m down into the ship. The gravity is very small. It says that they weigh 10 kg in that gravity. So what gravity are they in? Homework Equations I know I use w=ma, but how do I get the 10 kg into N? I guessed...

Okay so I was going through my calculus textbook and I am stumbled on the WORK section. Here it says work=force*distance, and force=mass*acceleration. In a problem they use gravity for acceleration which I guess you can do. So they have: F=mass*gravity So to calculate the...

I have a beaker with a liquid of density rho, and weight = W now I throw into it s Bob say, of density rho' and weight=w. can anyone explain what will be total new weight,with all forces explained for the cases: body floats. body sinks

Hello, I have a confusing question, please help. Suppose I have a structure like on the figure: . I want to find force acting along the bar, for example to find critical stresses. My brain thinks in two ways: 1. I can distribute P in the application point as Fb=P*sin(90-al); 2. I can...

Homework Statement When calculating weights away from Earth's surface, for example: At 6.38x10^3 km away from Earth's surface a spacecraft s weight is d=rE+rE or 2rE Then F=(1/4)(SpaceCraftWeight) What I don't understand is why the distance is rE+rE? Or when 1.28x10^4 km away d=rE+2rE or...

Sorry if my English is bad. We're building bridges and learning about truss and truss variations, but I'm still confused as to why the triangular shapes work best and what they achieve. How would I know side would be compressed and which would be tense? We have to build a bridge using roughly...