The table below describes some processes in which food is changed as it travels through the digestive system. Which of the processes describe only physical changes in the food particles?

Processes 1, 2, 3, and 4

Processes 1, 3, and 6

Processes 2, 5, and 6

Processes 1, 3, and 4

In a voltaic cell, electrons flow from the (positive/negative) to the (positive/negative) terminal.

Uppose we consider the system of the three capacitors as a single "equivalent" capacitor. given the charges of the three individual capacitors calculated in the previous part, find the total charge qtot for this equivalent capacitor. express your answer in terms of v and c.

An ideal otto cycle has a compression ratio of 10.5, takes in air at 90 kpa and 40°c, and is repeated 2500 times per minute. using constant specific heats at room temperature, determine the thermal efficiency of this cycle and the rate of heat input if the cycle is to produce 90 kw of power.