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

which conversion factors are used to convert 4km/min to meters per hour?select each correct answer* 1000m/1km*60min/1 h*1km/1000m*1h/ 60min
fruit are (mature/immature) plant _____________.
What event triggered the secession of South Carolina?
How did the Islamic Empire impact the areas it ruled?
cuales son las dificultades educativos que tienen en comun mexico y estadis unidos?
Trey has answered 15 emails. This is 20% of the emails he must answer. How many emails does he need to answer
There are 15 boys and 10 girls in miss Li class. She wants to group all the students so that each group has the same number of boys and girls as the other group
Use PEMDAS to solve this problem 6÷2(1+2)=?
The number of protons in an atom is called the what???
Which statement is TRUE about the factors affecting physical fitness? A. We have no control over any of the factors. B. We have total control over all the facto