(this is a non-relativistic warm-up problem, to get you to think about reference frames.) a girl throws a baseball upwards at time t=0. she catches it at exactly t=2.0 seconds. a) calculate the position of the ball as a function of time (0

answer: option c. i.e. electric current flowing “downhill” from the negative electrode to the positive electrode in a battery

explanation:

the water analogy to the circuits define the pipes (water flows) to the electric current. now, we know that the electric current flows from the positive terminal to the circuit (as shown in the diagram attached).

hence, option c is the correct answer.

an obstruction

a lot of it means it can be "burned" for energy and sold at one price. if it is scarce, the price will go up

answer: 2×10^-2kg

explanation: density= mass per volume

vol=mass/density

converting to s.i units we have;

3÷1000kg = 0.003

1.5÷100m = 0.15

0.003/0.15 = 0.02kg