Name 3 things in the solar system

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

How many times did thomas edison mess up the light bulb

This is for my 8th grade science class, i really don’t understand. can someone me? , lol.