a 100V battery is connected to two oppositely charge plates that are 10 cm apart. (i) what is the magnitude of the electric field? (ii)calculate the electric force exerted on a +200 mC point charge. (iii)what is the electric potential energy of the charge when it's 8cm and 2cm from the negatively charged plates?(iv) how much work was required to move the charge from 8cm to 2cm? (v) if the 10g point charge was at rest at point A, what is the final speed at point B?

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.

An object weighs 40n in air, weighs 20n when submerged in water and 30n when submerged in a liquid of unknown density. what is the density of the liquid?

If gases like carbon dioxide and methane make up less than 1% of the total atmosphere, why is it important for scientists to monitor changes in percentages of these gases?