What is the physical meaning of the vertical intercept for the static frictional force vs. normal force graph?

Question 11 of 13 (1 point) jump to question: a stairway, ladder, or ramp must be present in excavations in which of the following situations? a. all trenches must have access/egress b. the trench is more than 15 feet wide but only 1 ½ feet deep c. the trench is more than 4 feet deep and the devices must be within 25 feet of all workers

Avoltaic cell converts chemical energy to

The first law of thermodynamics states that heat added to a system is neither created nor destroyed but is as it changes into other forms of energy.