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

The perimeter of a triangle is 547.2 feet and the sides are in the ratio of 42:45:27. Find the area of the triangle.
Which of these features is relevant when buying a computer?
Memories of a Memory Have you ever witnessed something amazing, shocking or surprising and found when describing the event that your story seems to change the m
Theresa earned scores of 88 points, 84 points, 88 points, and 91 points on four tests. What is the lowest score she can get on the fifth test and still finish w
Which of the following is a common source of groundwater pollution? A. Oil dumping and Oil Spills B. Tossing candy bar wrappers into a stream C. Flushing househ
72in^2= ft^2find the blank
In Richard Connell’s short story “The Most Dangerous Game,” Zaroff’s aristocratic appearance and dignified manners mask his sinister, animalistic nature. Which
A city official has suggested raising permit fees for events like public rallies. The proposal has sparked a debate in the community. You have decided to submit
The value of 4 in 34,258 is _ times the value of 4 in 47,163
suppose a 14-gram sample of iron is heated from 20.0°c to 25.0°c. the specific heat of iron is 0.11 cal/g°c. how much heat energy was absorbed by the iron?