A capacitor charging circuit consists of a battery, an uncharged 20 μF capacitor, and a 4.6 kΩ resistor. At t = 0 s the switch is closed; 0.15 s later, the current is 0.46 mA . Part A What is the battery's emf?

Afeather of mass 0.001 kg falls from a height of 2 m. under realistic conditions, it experiences air resistance. based on what you know about friction, what can you say about the kinetic energy of the feather as it reaches the ground? acceleration due to gravity is g = 9.8 m/s2. a. ke < 0.0196 j b. ke = 00196 j c. je = 0 j d. ke > 0.0196 j

The vapour pressure of benzene is 53.3 kpa at 60.6 °c, but it fell to 51.5 kpa when 19.0 g of a non-volatile organic compound was dissolved in 500 g of benzene. calculate the molar mass of the compound.

The energy equivalent of the rest mass of an electron is