# mass

### B Is mass a measurement of energy?

That's pretty much it. Are physical objects essentially clumps of energy, and that energy is measured as mass? And do objects become more massive...
Thread by: Cody Richeson, Sep 21, 2017 at 9:19 AM, 5 replies, in forum: General Physics

### I Can gravity be negative?

Now, I know that it is theoretically possible for negative mass to exist and for negative energy to exist. But any gravity would act on all...
Thread by: caters, Sep 18, 2017 at 1:21 PM, 8 replies, in forum: General Physics

### A Mass eigenstates

Does saying "states of definite mass" is the same as saying "mass eigenstates"?
Thread by: aveline de grandpre, Sep 13, 2017, 3 replies, in forum: High Energy, Nuclear, Particle Physics

### B Mass and energy from Earth's gravitational field

Can someone please tell me how the energy field created by warped space (gravity) and centred at the earths core dissipates? Is it the...
Thread by: John M, Sep 4, 2017, 16 replies, in forum: Special and General Relativity

### B Does Mass determine our depth in the fabric of space?

I have not posted for a while,but something has been bugging me. I would like help understanding that if mass makes a dent in the fabric of space,...
Thread by: genphis, Jul 26, 2017, 48 replies, in forum: Special and General Relativity

### Is the buoyant force proportional to the mass?

1. The task is to figure out if the buoyant force is proportional to the mass of the object that is being sunk in the fluid (the fluid in this...
Thread by: Superman123, Jul 16, 2017, 10 replies, in forum: Introductory Physics Homework

### B How can Greenland lose 269b tons/year and loose only 269km3?

The density of ice is 920 kg/m3. Now let's calculate. m = 269 000 000 000 000 kg p = 920 kg/m3 ----------------------------- v=? V=m/p V=269 000...
Thread by: IvicaPhysics, Jun 12, 2017, 4 replies, in forum: Classical Physics

### Find velocity of boat as function of the time

1. The problem statement, all variables and given/known data a motorboat of mass m moves along a lake with velocity Vi. at the moment t=0 the...
Thread by: ays, Jun 6, 2017, 3 replies, in forum: Introductory Physics Homework

### I Torque to rotate pulley with equal mass on each side.

Lets say there is a pulley attached to the ceiling. Hanging on the pulley is a rope and on each end is a 1000 lb. weight. I believe that...
Thread by: mrkevelev, Jun 6, 2017, 3 replies, in forum: General Physics

### B Relationship between Higgs particles and gravitons?

In trying to understand the relationship between Higgs particles and gravitons, I would like to pose a question on hypothetical question: What...
Thread by: Sophrosyne, Jun 1, 2017, 5 replies, in forum: High Energy, Nuclear, Particle Physics

### Mass-spring-damper problem for kayaking waterfalls

Working on installing shocks in my kayak seat to protect my back when landing flat off of tall waterfalls (necessary when there isn't a deep...
Thread by: WW Kayaker, May 27, 2017, 31 replies, in forum: Mechanical Engineering

### I Why does a Mass Defect Exist if |PE| Increases?

Hello. Can you shed a different light on why mass defects exist please, so that I might finally grasp it intuitively?! I've had a look at these...
Thread by: Candidus, May 17, 2017, 7 replies, in forum: High Energy, Nuclear, Particle Physics

### Understanding an equation in a dynamics spring problem

1. The problem statement, all variables and given/known data A block of mass M = 0.5kg, attached to a spring of elastic constant k = 3N/m on a...
Thread by: Bunny-chan, Apr 30, 2017, 4 replies, in forum: Introductory Physics Homework

### I In gravitational assistance, does the mass matter?

The spacecraft "Helios 2" (with 100 kg of mass) used the Sun to get a speed of 250.000 km/h using gravitational assistance, I want to know if the...
Thread by: Rodrigo Olivera, Apr 23, 2017, 10 replies, in forum: General Physics

### Gravitational forces, speeds and masses

1. The problem statement, all variables and given/known data A comet moves around a stat in $xy$ plane along elliptical orbit, described by...
Thread by: gelfand, Apr 14, 2017, 11 replies, in forum: Introductory Physics Homework

### Energy to accelerate an 1kg object to 0.9965c?

1. The problem statement, all variables and given/known data How much energy does it take to accelerate an object of mass 20,000 kg from rest to...
Thread by: Robert23, Mar 28, 2017, 8 replies, in forum: Introductory Physics Homework

### Can time be considered a direct function of movement?

Can it be said that time is directly related to movement? That is to say, on a quantum level, if all motion were to cease, would that not bring...
Thread by: dasmike1, Mar 12, 2017, 37 replies, in forum: Classical Physics

### I Galileo's experiment and a lack of understanding...

Could anyone offer me a little help with understanding why the principles demonstrated in Galileo's (probably fictional, I know) experiment...
Thread by: TwoShortPlancks, Feb 26, 2017, 7 replies, in forum: General Physics

### Two identical forces on two different masses...

Here is all the work I have done so far (hopefully it is right). My brain somewhat shuts down when it comes to ratios. [ATTACH]
Thread by: EthanVandals, Feb 3, 2017, 4 replies, in forum: Introductory Physics Homework

### How to calculate the mass of a ball based on a video

1. The problem statement, all variables and given/known data I would like to know how I calculate mass of a ball based on a video. I can measure...
Thread by: Sirbastian, Jan 24, 2017, 17 replies, in forum: Introductory Physics Homework