An ideal otto cycle with air as the working fluid has a compression ratio of 10. the minimum and maximum temperatures in the cycle are 540 and 2400 r. accounting for the variation of specific heats with temperature, determine: (a) the amount of heat transferred to the air during the heat-addition process. (b) the thermal efficiency. (c) the thermal efficiency of a carnot cycle operating between the same temperature limits.

Amass m = 74 kg slides on a frictionless track that has a drop, followed by a loop-the-loop with radius r = 18.4 m and finally a flat straight section at the same height as the center of the loop (18.4 m off the ground). since the mass would not make it around the loop if released from the height of the top of the loop (do you know why? ) it must be released above the top of the loop-the-loop height. (assume the mass never leaves the smooth track at any point on its path.) 1. what is the minimum speed the block must have at the top of the loop to make it around the loop-the-loop without leaving the track? 2. what height above the ground must the mass begin to make it around the loop-the-loop? 3. if the mass has just enough speed to make it around the loop without leaving the track, what will its speed be at the bottom of the loop? 4. if the mass has just enough speed to make it around the loop without leaving the track, what is its speed at the final flat level (18.4 m off the ground)? 5. now a spring with spring constant k = 15600 n/m is used on the final flat surface to stop the mass. how far does the spring compress?

Using the free-body diagram, calculate the net force acting on the sled. is the sled in a state of dynamic equilibrium?

What are some important factors to consider when choosing a warm-up before your workout?