PLEASSE HELP ME As a tungsten light bulb ages, it gets dimmer due to a lower current in the filament. Which statement below describes a possible cause for this lower current?

A. Tungsten evaporates from the filament, decreasing the cross-sectional area, thus decreasing the resistance.
B. Tungsten evaporates from the filament, decreasing the cross-sectional area, thus increasing the resistance.
C. Tungsten expands, increasing the length of the filament, thus decreasing the resistance.
D. Tungsten shrinks, decreasing the length of the filament, thus increasing the resistance

How much work does the charge escalator do to move 2.30 μc of charge from the negative terminal to the positive terminal of a 3.00 v battery?

Aman tries to push a box of mass 4 kg with a force of 5 n but the box remains stationary if the coefficient of static friction is 0.45, what is the value of the maximum force of friction?

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%)