Urgent due in half an hour: you are in the middle of a large field. you walk in a straight line for 100m, then turn left and walk 100m more in start line before stopping. when you stop, you are 100m from the starting point. by how many degrees did you turn? a) 90b) 120c) 30d) 180e) this is impossible. you cannot walk 200m and be the only 100m away from where you started.

The simple interest on a loan of $200 at 10 percent interest per year is $10 per year until the loan is paid off. $15 per year until the loan is paid off. $20 per year until the loan is paid off. $25 per year until the loan is paid off.

Does heating a metal wire increase or decrease its electrical resistance? why?

An ideal otto cycle has a compression ratio of 8. at the beginning of the compression process, air is at 95 kpa and 27°c, and 750 kj/kg of heat is transferred to air during the constant-volume heat-addition process. assuming constant specific heats at room temperature, determine (a) the pressure and temperature at the end of the heat-addition process, (b) the net work output, (c) the thermal efficiency, and (d) the mean effective pressure for the cycle. (4390 kpa, 1730 k; 423 kj/kg; 56.4%; 534 kpa)