What is the sign of the work done on the system and by the system?
2 Taking it in a different sense: chemistry is taken the approach that you want to create a new configuration inside the reaction vessel (and input energy like heat or such) and the physics course …
Thermodynamics - Sign convention - Physics Stack Exchange
I think the confusion arises due to difference in equations from Physics and Chemistry text books. The physics text writes ∆U=q-w while chemistry says ∆U=q+w. From the physics text its mentioned that …
Why do positive charges attract negative charges? - Physics Stack …
Mar 9, 2020 · Physics doesn't attempt to explain why things like fundamental forces exist, it just tries to explain how they behave. We can say that these forces are due to various symmetries of space …
What do we mean by positive terminal and negative terminal?
Apr 20, 2019 · Does positive terminal mean positive electric potential energy and negative terminal mean negative electric potential energy ? Yes that is correct when we consider "conventional" …
Solved Positive Physics - Unit 0: Scienc: | Chegg.com
Positive Physics Unit 0: Scienc: positivephysics.org / lesson / physics / science math toolkit / interpreting graphs?courselD = 1 8 unitID = 9 4 &skillID = 7 8 7 &mode = work&problemID = 4 7 6 0 …
kinematics - Does the acceleration due of gravity taken positive or ...
In that case, if initial velocity is 20m/s and g=10m/s², then the displacement upward in 2 seconds would be 40m if acceleration due of gravity is positive upward and the displacement would be 10m if g is …
Why charge can be positive or negative but mass is always positive ...
Oct 31, 2024 · Not only that but a special configuration of negative masses and positive masses can be used to produce infinite kinetic energy (bad). “Mass” and “charge” are very explicitly defined in …
When does acceleration due to gravity equal positive/negative?
0 If up is positive, and gravity points down, then a a (acceleration due to gravity) would be downwards, so it will have a negative magnitude.
Is $dx$ always positive? - Physics Stack Exchange
Jul 25, 2022 · If it is positive it indicates an increase from the initial value and negative indicates a decrease. But when we take this to an infinitesimal perspective and denote the change as dx d x for …
How to determine if - Physics Stack Exchange
Nov 23, 2016 · 1 Firstly, lets define a reference system. Lets place the origin at the center of the lens and let right hand side be positive and left negative. The Lensmaker's formula works with this …