Lodestone am iron were the only known magnetic materials in Gilbert's day, and his task was to investigate magnetism. Gilbert was so sure that the earth was a giant lodestone and used the earth as a primary reference, defining the north(magnetic) pole of a needle, or a a nail floating on a piece of cork, to be that which turns towards the Earth's north geographic pole. he wanted to prove this with a model Terella, using short pieces of iron.

7 0

3 years ago

1. If I dig a 6FT hole how deep is that hole?

iren [92.7K]

Answer:

For the first one its about 25 feet

Explanation:

5 0

3 years ago

Read 2 more answers

Suppose you increase your walking speed from 4m/s to 12m/s in a period of 1 s. What is your acceleration?

den301095 [7]

We use the following formula to determine our acceleration:
$acceleration = \frac{(final velocity) - (initial velocity)}{time} = \frac{change of velocity}{time}$
We normally use letters in this formula, which gives us:
$a = \frac{v}{t}$

Filling in this formula gives us:
Δv (change of velocity) = 12 - 4 = 8 m/s
t = 1s
$a = \frac{8}{1} = 8 m/s^2$
So our answer: the acceleration is $8m/ s^{2}$

3 0

3 years ago