Astudy was conducted to test the effectiveness of a juggling class. before the class started, six subjects juggled as many balls as they could at once. after the class, the same six subjects juggled as many balls as they could. the differences in the number of balls are calculated. the differences have a normal distribution. test at the 1% significance level. (calculate "after" − "before.")

Steel is coated with a thin layer of ceramic to protect against corrosion. what do you expect to happen to the coating when the temperature of the steel is increased significantly? explain.

Acompressor receives the shaft work to decrease the pressure of the fluid. a)- true b)- false

Consider a large isothermal enclosure that is maintained at a uniform temperature of 2000 k. calculate the emissive power of the radiation that emerges from a small aperture on the enclosure surface. what is the wavelength ? , below which 10% of the emission is concentrated? what is the wavelength ? 2 above which 10% of the emission is concentrated? determine the wavelength at which maximum spectral emissive power occurs. what is the irradiation incident on a small object placed inside the enclosure?