Two small aluminum spheres, each of mass 0.0250 kilograms, areseparated by 80.0 centimeters.
how many electrons does each sphere contain? (the atomic mass ofaluminum is 26.982 grams per mole, and its atomic number is13.)
how many electrons would have to be removed from one sphere andadded to the other to cause an attractive force between the spheresof magnitude 1.00*10^{4}n}(roughly one ton)? assume that the spheres may be treated as pointcharges.
what fraction of all the electrons in one of the spheres does thisrepresent?

A110-pound person pulls herself up 4.0 feet. this took her 2.5 seconds. how much power was developed? 0.13 hp 0.32 hp 2.0 hp 3.1 hp

If 21.2 kcals of energy is released by this reaction, how many kj does the reaction release? (1 cal 4.184 j)

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%)