An automobile, initially moving at 20 m/s, accelerates for 10 sec over a distance of 300m. What is its acceleration and average velocity? I'm confused since it says "initially moving", so I think I might need to find the final velocity in order to find the acceleration, but I don't know how. Or I could just be overthinking it

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?

If the textbook weighs 19.6 newtons on venus, what is the strength of gravity on venus?

Which levels of government establish and implement educational requirements for minors