Find an expression for the voltage across the capacitor as a function of time for . Assume steady state conditions exist for . Enter your expression:

What happens to light waves from a star as the star moves away from earth?

This is important. 1. which of the following is an si base unit for measuring length? (2 points) inch gram meter mole 2. which of the following units for distance is an si unit? (2 points) centimeter foot inch yard 3. which of the following tools should a scientist use to measure an object in meters? (2 points) electronic balance pan balance tape measure thermometer

Explain why electric current cannot exist if a current doesn't have a voltage source.