You connected the 5 Ω, 10 Ω, 15 Ω resistors in series with a 90 V battery. What is the current?​

An element becomes a positively charged ion when itloses protons.loses electrons.gains electrons.gains neutrons.

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?

Is a volume of space that is empty of matter.