An investment has the following cash flow series where interest is 8%: end of year cash flow end of year cash flow 0 $300 5 $0 1 $300 6 $800 2 $600 7 $700 3 -$500 8 $600 4 -$300 a. determine the present worth of the series. b. determine the future worth of the series at the end of the 8th year. c. find the worth of the series at the end of year 2.

Under conditions for which the same room temperature is maintained by a heating or cooling system, it is not uncommon for a person to feel chilled in the winter but comfortable in the summer. provide a plausible explanation for this situation (with supporting calculations) by considering a room whose air temperature is maintained at 20â°c throughout the year, while the walls of the room are nominally at 27â°c and 14â°c in the summer and winter, respectively. the exposed surface of a person in the room may be assumed to be at a temperature of 32â°c throughout the year and to have an emissivity of 0.90. the coefficient associated with heat transfer by natural convection between the person and the room air is approximately 2 w/m2 â‹…â‹… k. what is the ratio of the thermal resistance due to convection to the thermal resistance due to radiation in the summer? what is the ratio of thermal resistances in the winter

Abanked road comer of radius 146 m is to be constructed. if the comer is designed for vehicles moving with a speed of 20.0 m/s, what should the banking angle be, in units of degrees?

Which of the following is not a physical property of mattera. melting pointb.heat of combustionc. viscosityd. boiling point