Directions: Complete the table below. Time (t)
a
Final velocity
V
Initial velocity
V
V-V
Av
1
26 m/s
20 m/s
6 s
2.
O km/s
12 km/s
4s
3
8 m/s
3 m/s
2 s
4
46.4 m/s
27.3 m/s
11 s
Ол
5 m/s
15 m/s
5 s

The rigid beam is supported by the three suspender bars. bars ab and ef are made of aluminum and bar cd is made of steel. if each bar has a cross-sectional area of 450 mm2, determine the maximum value of p if the allowable stress is (σallow)st = 200 mpa for the steel and ( σallow)al = 150 mpa for the aluminum. est = 200 gpa and eal = 70 gpa.

Explain vector addition, triangle method and parallelogram method

Acoal-fired plant generates 600 mw of electric power. the plant uses 4.8 x 10^6 kg of coal each day, and the heat of combustion of coal is 3.3x 10^7 j/kg. the steam that drives the turbines is at a temperature of 300° c, and the exhaust water is at 37° c. (a) what is the overall efficiency of the plant for generating electric power? (b) how much thermal energy is exhausted each day? (c) what is the change in entropy of the universe for this heat engine? (d) using the same heat reservoirs, what is the maximum possible (carnot) efficiency for a heat engine?