Energy vs force vs work vs power - Physics Forums
Aug 30, 2014 · In physics, I know that all of these terms are used. I need to brush up on my physics and I plan to study during my free time (I want to master the conversion from one form …
Power Formula: Frequency & Electrical Power Explained - Physics …
Mar 6, 2015 · We all know that the electrical power = V * I * cos Q. and I know how this formula is derived. but yet intuitively I was expecting to see the frequency in the formula. I just need …
I understanding the formula Power loss= I^2 R - Physics Forums
Nov 19, 2008 · The power loss is given by I ^2 R where I is the current and R is the resitance. I know why these variables are in this equation. V = I R P = I V...
What is the integral of energy? - Physics Forums
Feb 14, 2019 · So the classical law of force given by Newton is F= ma = dp/dt = qE. Thus if i integrate the last two equivalents I get: ∫(dp/dt)dt = q∫Edt p + C = q∫Edt correct? then what …
What is the relation of mass and power? - Physics Forums
Jan 16, 2018 · How should power be calculated in a situation where distance and time are both given, as well as mass. At first, I was thinking of just using W=Fx (force as mass x 9.8) to …
Derivation of formula for pump power - Physics Forums
Oct 14, 2011 · Hi I was given the following formula for to calculate the power of a centrifugal pump: P = ρ * g * Q * H i.e. Power = Density * acceleration due to gravity * volumetric flow rate …
Why Does Doubling Speakers Double Sound Pressure with Less …
Dec 16, 2017 · Hello, I have a question that I've been struggling to find an answer to / understand. Probably because my understanding of physics is quite limited :) Before I ask the question, …
Calculating Power from Mass, Acceleration, and Time? - Physics …
Apr 11, 2006 · I am trying to work out power from acceleration and mass alone. But I'm having a mind blank with regard to the actual calculation and it is driving me crazy. :confused: Force = …
Given mass, distance, and time, calculate power - Physics Forums
Sep 19, 2010 · Homework Statement How much power does a weightlifter expend when lifting a 50kg barbell a distance of 1.2m in a time interval of 1.5s? Homework Equations Power=work …
Energy - Can energy be negative? • Physics Forums
May 21, 2012 · Energy -- Can energy be negative? Can energy be negative? If yes,can mass be negative?(since E=mc^2)