Use the conservation of angular momentum; angular momentum at the beginning = angular momentum at the end
Conservation of angular momentum:
I1 w1 = I2 w2
Where I is the moment of inertia. For a sphere, I=2/5 m R^2. Substituting into the equation above we get
w2 = I1 w1 / I2 = w1 m1 R1^2 / (m2 R2^2)
w2 = w1 4 * (R1/R2)^2
= 4*(1)*(7E5/7.5)^2
= 3.48E10 revs/(17days)
= 2.04705882 x 10^9 revs/sec
1.41 is the magnitude and -45° is the direction
See the attached picture for answers
Answer:
11320.63 Pa
Explanation:
= Pressure the heart is pumping at =
(assumed)
= Density of blood = 1060 kg/m³
g = Acceleration due to gravity = 9.81 m/s²
h = Height = 0.45 m
From Bernoulli's equation we have
![P_1=P_2-\rho gh\\\Rightarrow P_1=1.6\times 10^4-1060\times 9.81\times 0.45\\\Rightarrow P_1=11320.63\ Pa](https://tex.z-dn.net/?f=P_1%3DP_2-%5Crho%20gh%5C%5C%5CRightarrow%20P_1%3D1.6%5Ctimes%2010%5E4-1060%5Ctimes%209.81%5Ctimes%200.45%5C%5C%5CRightarrow%20P_1%3D11320.63%5C%20Pa)
The pressure in the artery is 11320.63 Pa
Answer:
14 atoms
Explanation:
Number of atoms in Fe₂(CO₃)₃
An atom is the smallest indivisible particle that takes part in a chemical reaction.
In Fe₂(CO₃)₃; we have:
Elements Number of atoms
Fe 2
C 3
O 3(3) = 9
Total number of atoms = 2 + 3 + 9 = 14 atoms