Unicrumb
Unicrumb Unicrumb
  • 03-03-2017
  • History
contestada

In 1908, who invented and patented a rotary drill that could break rock?

Respuesta :

ddaeseleer15
ddaeseleer15 ddaeseleer15
  • 03-03-2017
It was Howard R. Hughes
Answer Link

Otras preguntas

Invent a five value data set for which the mean is 6 and the mode is not 6
Two days after placement of a pleural chest tube, the tube is accidentally pulled out of the chest wall. the nurse should first:
The total amount of water on earth is fixed then why studies show that 40 percent of the world population live in water stressed areas
What was one of the events that led to U.S. involvement in WWI? a. U.S. troops were captured after they were sent on a peace seeking mission. b. Germany sunk
Why would a finch population that lives on an island have a higher rate of speciation than a finch population that lived in a large forest in North America?
The principle of superposition states that an undisturbed rock layers, the youngest layer of rock will be on the bottom , while the oldest layer will be on top.
Show that the sum of the reciprocals of three different positive integers is greater than 6 times the reciprocal of their product.
Chandra looking at many different facebook profiles and then feeling better about herself is an example of
como puedo aprender mejor ingles?
I really need help with all these lol