8. because of its energy of motion, when a vehicle's speed doubles, it needs about:

What is magnetic flux? explain faraday's law of induction.

When an object is heated it contracts. a. true b. false

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