A. four equal particles with positive charge q = 14.418x10-19 c and mass m = 81.99x10-31 kg are initially held at the four corners of a square of side l = 0.07 m. what is the total electric potential at the center of the square? (in v)

b. if these particles are released simultaneously, what will be their speed when they have separated by a very large distance? you may neglect gravitational effects. in (m/s)

Asteam power plant operates on an ideal reheat rankine cycle between the pressure limits of 15 mpa and 10 kpa. the mass flow rate of steam through the cycle is 12 kg/s. steam enters both stages of the turbine at 500°c. if the moisture content of the steam at the exit of the low-pressure turbine is not to exceed 10 percent, determine (a) the pressure at which reheating takes place, (b) the total rate of heat input in the boiler, and (c) the thermal efficiency of the cycle. also, show the cycle on a t-s diagram with respect to the saturation lines. (2.15 mpa; 45.0 mw; 42.6%)

Ethanol has a heat of vaporization of 38.56 kj/mol and a normal boiling point of 78.4 c. what is the vapor pressure of ethanol at 14 c?

Identify some abiotic characteristics of the tundra biome.