Four wires meet at a junction. it is assumed that two currents, i1 and i4, enter the node. an ammeter records a value of +4a for i1. currents i2 and i3 are travelling out of the node. i2 has 3a running through it, and i3 has 0.5 a running through it. what is the current in i4?

When considering gravity acceleration and the force of acceleration, what must be true? a. the direction of acceleration must be perpendicular to the direction of the force. b. the direction of the force and the direction of acceleration must be the same as each other. c. the direction of the force and the direction of acceleration must be opposite of each other. d. the mass of the body must be the same as the acceleration of the body.

Waves that cause the most damage during an earthquake are a. surface waves c. s waves b. p waves d. ocean waves

Acable exerts a constant upward tension of magnitude 2.14 ✕ 104 n on a 1.80 ✕ 103 kg elevator as it rises through a vertical distance of 2.30 m. hint (a) find the work done by the tension force on the elevator (in j)