A voltmeter is connected in parallel with a variable resistance, R, which is in series with an ammeter and a cell.
For one value of R the meters read 0.3 amp and 0.9 volt.
For another value of the readings are 0.25 amp and 1.0 volt.
Find:
[3]
(a) the emf of the cell
(b) the internal resistance of the cell
(c) the values of R
[3]

On a frictionless air track, a blue glider with mass 0.200 kg is moving to the right with a speed of 8.00 m/s. it strikes a red glider that has mass 0.600 kg and that is initially at rest. after the collision, the blue glider is moving to the left with a speed of 3.00 m/s.(a) what are the magnitude and direction of the velocity of the red glider after the collision? (b) is this collision elastic?

What is the coldest temperature ever recorded in san antonio?

Why are nonmetals more likely to react with eachother by sharing electrons