What happens if you double the number of batteries used in a circuit? (assume all of the batteries are the same.) does the voltage in crease? does the current increase? or both?

The graph shown is a velocity-time graph of an object. what is the acceleration of the object from 6.0 to 10.0 seconds?

The experiment done in lab is repeated, using a ball that has unknown mass m. you plot your data in the form of f 2 versus m/l, with f in rev/s, m in kg, and l in m. your data falls close to a straight line that has slope 3.19 m/(kg · s2). use g = 9.80 m/s2 and calculate the mass m of the ball.

Aprisoner is forced to go into one of three rooms, but he can choose which room. the first room is ablaze with fire. the second one is rigged with explosives that will go off as soon as he enters. the third contains a pair of lions who haven't eaten in years. which room should he choose to survive?