Sound waves require a medium to travel through. :D
Answer:
The unknown force will be 18.116 lb.
Explanation:
Given that,
Three forces act on a flange as shown in figure.
The net force acting on the flange is a minimum.

We need to calculate the unknown force
Using formula of net force

Put the value into the formula


The magnitude of net force,




On differentiating w.r.to F




Negative sign shows the direction of force which is downward.
Hence, The unknown force will be 18.116 lb.
Because a galaxy is a large collection of many stars, and almost every star radiates some visible light.
Answer:
DU = 21 KJ
Explanation:
Given the following data;
Quantity of heat = 125 KJ
Work = 104 KJ
To find the change in internal energy;
Mathematically, the change in internal energy of a system is given by the formula;
DU = Q - W
Where;
DU is the change in internal energy.
Q is the quantity of energy.
W is the work done.
Substituting into the formula, we have;
DU = 125 - 104
DU = 21 KJ
The snail’s speed is 0.001042. Hope this helps!