Units of RC are the same as time - help

  • Thread starter Thread starter pat666
  • Start date Start date
  • Tags Tags
    Rc Time Units
AI Thread Summary
The discussion focuses on demonstrating that the product of resistance (Ohms) and capacitance (Farads) equates to time (seconds). Participants emphasize the need to express Ohms and Farads in terms of fundamental MKS (meter-kilogram-second) units. A suggestion is made to consult resources that outline the MKS composition of various units, including textbooks that provide helpful tables. Understanding these relationships is crucial for solving the homework problem. The conversation highlights the importance of fundamental unit analysis in physics.
pat666
Messages
703
Reaction score
0

Homework Statement


the title says it all, we are required to show that the units of RC are the same as the units of time.
ie. iohm * 1 farad = 1 seconds
Need help
thanks


Homework Equations





The Attempt at a Solution

 
Physics news on Phys.org
What is the definition of 1 Ohm?

What is the definition of 1 Farad
 
pat666 said:

Homework Statement


the title says it all, we are required to show that the units of RC are the same as the units of time.
ie. iohm * 1 farad = 1 seconds
Need help
thanks


Homework Equations





The Attempt at a Solution


As skeptic says, you need to find those units in terms of the fundamental mks units that make them up. You can google Units in Physics to find some pages that give you the mks makeup units of other units. One of my E&M books (Plonus) has a very handy table inside the front cover...
 
TL;DR Summary: I came across this question from a Sri Lankan A-level textbook. Question - An ice cube with a length of 10 cm is immersed in water at 0 °C. An observer observes the ice cube from the water, and it seems to be 7.75 cm long. If the refractive index of water is 4/3, find the height of the ice cube immersed in the water. I could not understand how the apparent height of the ice cube in the water depends on the height of the ice cube immersed in the water. Does anyone have an...
Thread 'Variable mass system : water sprayed into a moving container'
Starting with the mass considerations #m(t)# is mass of water #M_{c}# mass of container and #M(t)# mass of total system $$M(t) = M_{C} + m(t)$$ $$\Rightarrow \frac{dM(t)}{dt} = \frac{dm(t)}{dt}$$ $$P_i = Mv + u \, dm$$ $$P_f = (M + dm)(v + dv)$$ $$\Delta P = M \, dv + (v - u) \, dm$$ $$F = \frac{dP}{dt} = M \frac{dv}{dt} + (v - u) \frac{dm}{dt}$$ $$F = u \frac{dm}{dt} = \rho A u^2$$ from conservation of momentum , the cannon recoils with the same force which it applies. $$\quad \frac{dm}{dt}...

Similar threads

Back
Top