A concave mirror has a focal length of 12.0 cm. An object is placed 40.0 cm in front of the mirror. Calculate the image distance and determine if the image is real or virtual. Ans: 17.14 cm

Describe how the fermi level changes with donor level, temperature and contact with p and n type semiconductors

Apulley with a mechanical advantage of 5 will require you to pull times the amount of rope. a. 1/5 b. 5 c. 10 d. 15

6–48 bananas are to be cooled from 24 to 138c at a rate of 215 kg/h by a refrigeration system. the power input to the refrigerator is 1.4 kw. determine the rate of cooling, in kj/ min, and the cop of the refrigerator. the specific heat of banana above freezing is 3.35 kj/kg·8c.