Jake designed an experiment to demonstrate a solar eclipse. the steps of the experiment are listed below.
place a light bulb on a stand.
stick a pencil into a small styrofoam ball.
switch on the light bulb and darken the room.
stand with your back towards the light bulb.
hold the pencil with styrofoam ball in front of you at arm's length.
jake's experiment has a flaw. which of these statements best describes a method to correct the flaw in jake's experiment?
a) stand facing the light bulb.
b) replace the light bulb with a candle.
c) use a big globe instead of styrofoam ball.
d) clamp the styrofoam ball behind the light bulb.

Steam is generated in a boiler of a cogeneration plant at 10 mpa and 450°c at a steady rate of 5 kg/s. in normal operation, steam expands in a turbine to a pressure of 0.5 mpa and is then routed to the process heater, where it supplies the process heat. steam leaves the process heater as a saturated liquid and is pumped to the boiler pressure. in this mode, no steam passes through a condenser, which operates at 20 kpa. (a) determine the power produced in the turbine and the rate at which process heat is supplied in this mode. (b) determine the power produced in the turbine and the rate of process heat supplied if only 60 percent of the steam is routed to the process heater and the remainder is expanded to the condenser pressure. (3.32 mw; 9.69 mw; 4.25 mw; 5.82 mw)

If it takes a planet 2.8 x 10^8 s to orbit a star with a mass of 6.2 x 10^30 kg what is the average distance between the planet and the star

Steam enters an adiabatic diffuser at 150 kpa and 1208c with a velocity of 550 m/s. determine the minimum velocity that the steam can have at the outlet when the outlet pressure is 300 kpa.