Answer:
619.8 N
Explanation:
The tension in the string provides the centripetal force that keeps the rock in circular motion, so we can write:
where
T is the tension
m is the mass of the rock
v is the speed
r is the radius of the circular path
At the beginning,
T = 50.4 N
v = 21.1 m/s
r = 2.51 m
So we can use the equation to find the mass of the rock:
Later, the radius of the string is decreased to
r' = 1.22 m
While the speed is increased to
v' = 51.6 m/s
Substituting these new data into the equation, we find the tension at which the string breaks:
Answer:
British laws and customs were introduced. Schools and hospitals were built. Britain has the largest variety of different cultures, this has made Britain the most diverse country because we took over many colonies and a lot have come to live in Britain.
Explanation:
Answer:
Add Ff from Fa
Explanation:
Fnet = sum of all force
horizontal net force = Ff + Fa
Answer:
These electrons are "bonding pairs."
Explanation:
Two atoms share a pair of two valence electrons between them to form a covalent bond. (Of course they can share more than one pairs to produce a double, or a triple bond.) These valence electrons are called "bonding pairs."
In contrast, if a pair of valence electrons on an atom are not shared with another atom, that pair of valence electrons is called a "lone pair".