The circulatory system breaks down food and gets / absorbs nutrients. The muscular system works to get nutrients to the rest of the body. The nervous system basically controls the digestive system and sends information to the brain.

I'm pretty sure I'm right, but please correct me if I'm wrong! :)

5 0

3 years ago

A roller coaster has a "hump" and a "loop" for riders to enjoy (see picture). The top of the hump has a radius of curvature of 1

nikklg [1K]

Answer:

Part a)

$F_n = 306 N$

Part B)

$v = 12.1 m/s$

Explanation:

Part A)

At the top of the hump the force on the rider is

1) Normal force

2) weight

so here we know that

$mg - F_n = \frac{mv^2}{R}$

$F_n = mg - \frac{mv^2}{R}$

$F_n = (100)(9.81) - \frac{100(9^2)}{12}$

$F_n = 306 N$

Part B)

At the top of the loop we will have

$F_n + mg = \frac{mv^2}{R}$

in order to remain in contact the normal force must be just greater than zero

so we will have

$mg = \frac{mv^2}{R}$

$v = \sqrt{Rg}$

$v = \sqrt{15\times 9.81}$

$v = 12.1 m/s$

5 0

3 years ago

Which two atmospheric gases do not react with many substances?

Gennadij [26K]

Answer:

the answer is B ( Argon (Ar) )

4 0

3 years ago