Which of the following equations illustrates the law of conservation of matter?
O A. 2A1 + 02 → Al2O3
O B. 4AI + 302 → 2A1203
O C. 2A1 + 302 → Al2O3
O D. 4A1 + O2 + 2A1203

Ball b is hanging from an inextensible cord. an identical ball a is released from rest when it is just touching the cord and drops through the vertical distance h a 5 8 in. before striking ball b. assuming e 5 0.9 and no friction, determine the resulting maximum vertical displacement h b of the ball b

(2) (a) you have a simple circuit that consists of only a battery (δvbat=1.5v) and two resistors with resistance r1=10ω and r2=5ω, connected in series with each other. what is the current running through the battery? (b) you re-arrange your circuit so now r2 is attached in parallel to r1 rather than in series. what is the current running through the battery? (c) you add an additional resistor r3=7ω on the same branch as r2. what is the current running through the battery? (d) what is the power dissipated in r3?

Amagnetic field applies forces on: a)static chargesb)moving chargesc)water flow