Sandy rubs a rubber rod with a piece of animal fur. the total charge of the system before rubbing is zero. the system is made up of the rubber rod and the fur. initially, the charge on the rod is zero and it is electrically neutral. the same is true for the fur. when sandy rubs the rubber rod with the fur, the rubber rod acquires negative charges. how does the system change, overall, based on the law of conservation of charge?

Aseries circuit consists of a resistor with r = 20 ? , a capacitor with c = 0.01 f, and a decaying battery with e = 300e? 5t. if the initial charge is 0, find the charge as a function of time t

After the near spacecraft passed mathilde, on several occasions rocket propellant was expelled to adjust the spacecraft's momentum in order to follow a path that would approach the asteroid eros, the final destination for the mission. after getting close to eros, further small adjustments made the momentum just right to give a circular orbit of radius 45 km (45 × 10^3 m) around the asteroid. so much propellant had been used that the final mass of the spacecraft while in circular orbit around eros was only 545 kg. the spacecraft took 1.04 days to make one complete circular orbit around eros. calculate what the mass of eros must be.

Look at the potential energy diagram for a chemical reaction. which statement correctly describes the energy changes that occur in the forward reaction?