9514 1404 393
Answer:
1333.3 N
Step-by-step explanation:
The centripetal acceleration is given by ...
a = v^2/r
a = (100m/s)^2/(3 m) = (10^4)/3 m/s^2
Then the force on the ball is ...
F = Ma = (0.4 kg)(10^4)/3 kg·m/s^2 ≈ 1333.3 N
ANSWER
6.5 calories per minute.
EXPLANATION
To find the calories Shelley burned per minute, divide the total calories burned by the total minutes ran.
Calories burned for a minute

This will give us,

Answer:
4.0
Step-by-step explanation:
Using trig identity Tangent, tangent is equal to opposite / adjacent side. Therefore tan30 = x/7, because x is the side opposite to 30 degrees and it is adjacent to 7, (note: adjacent side is never the hypotenuse)
To save time, tan 30 = sqrt(3)/3,
sqrt(3)/3 = x/7
x = 7*sqrt(3)/3 ~ 4.041
Answer:
10
Step-by-step explanation:
reduce the index of the radical and exponent with 2
|10|
The absolute value of any number is positive
10
Answer:
a
Step-by-step explanation:
square formula for area is 