Answer:
Explanation:
Given data
Required
Partial pressure of helium
Solution
First calculate the total volume of gas mixture once the stopcock is opened
So
As temperature remains constant,by Boyle's Law we calculate the partial pressure of the helium gas
So
The answer is protons
Electrons have negative charge and neutrons have 0 charge
<span>Calcium - alkali earth metals is the answer</span>
The sketch of the system is: two strings, 1 and 2, are attached to the ceiling and to a third string, 3.The third string holds the bag of cement.
The free body diagram of the weight with the string 3, drives to the tension T3 = weihgt => T3 = 325 N
The other free body diagram is around the joint of the three strings.
In this case, you can do the horizontal forces equilibrium equation as:
T1* cos(60) - T2*cos(40) = 0
And the vertical forces equilibrium equation:
Ti sin(60) + T2 sin(40) = T3 = 325 N
Then you have two equations with two unknown variables, T1 and T2
0.5 T1 - 0.766 T2 = 0
0.866 T1 + 0.643T2 = 325
When you solve it you get, T1 = 252.8 N and T2 = 165 N
Answer: T1 = 252.8 N, T2 = 165N, and T3 = 325N
Answer:
16/22
Explanation:
you add red and blue together
