Blank is what is happening in the air or atmosphere at one time in one place a-weather b-climate

To do work, this truck uses energy stored in chemical fuel and an electrical battery. how much total energy does this truck put out?

In positive numbers less than 1, the zeros between the decimal point and a non-zero number are blank significant

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