As the moon revolves around the earth, the side that faces the earth is usually just partially illuminated by the sun. the phases of the moon describe how much of the surface appears to be in sunlight. an astronomical measure of phase is given by the fraction f of the lunar disc that is lit. when the angle between the sun, earth, and moon is θ (0 ≤ θ < 360°), then the fraction f is given by the formula below. f = 1 2 (1 − cos(θ)) determine the angles θ that correspond to the following phases. (enter your answers as a comma-separated list.)

Many machines- including inclined planes such as ramps- increase the strength of the force put into the machine but decrease the distance over which the force is applied.

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%)

Adisk with a radius of r is oriented with its normal unit vector at an angle q with respect to a uniform electric field. which of the following would result in an increase in the electric flux through the disk? check all that apply? a. increasing the area of the disk b. decreasing the given orientation angle of the disk c. decreasing the strength of the electric field d. increasing the given orientation angle of the disk, but not exceeding an angle of 90