Answer:
The first frequency of audible sound in the speed sound is
f = 662 Hz
Explanation:
vs = 344 m/s
x = 52 cm * 1 / 100m = 0.52m
The wave length is the distance between the peak and peak so
d = 2x
d = 2*0.52 m
d = 1.04 m
So the frequency in the speed velocity is
f = 1 / T
f = vs / x = 344 m/s / 0.52m
f ≅ 662 Hz
Like mass and energy, it is already part of the natural phenomena that momentum is always conserved. However, just like energy, there are exception to this rule. This is when an external force is applied to the system which causes it to work reversely. <em>Therefore, momentum is conserved when no net external force is applied. </em>
Answer:
More reactant forms.
Explanation:
Given reaction is,
⇒
per mole
This is an Exothermic Reaction,(ΔE=-57.3KJper mole)
We know the equilibrium point of all Exothermic reactions moves leftward and more reactant is formed at the equilibrium.
<u>Reason:</u>
As heat is being produced in the reaction the additional heat(57.3KJpermole) can be <u>thought of as a product</u> of the reaction.
So,if you increase the temperature ,you provide heat energy,
(in other words heat energy is given) and hence the concentration of the products increases.
So, with respect to LeChateliers Principle,
As the concentration of products is increased by external means,more of the reactants are produced at the equilibrium of the reaction.
Therefore amount of reactants increases as <u>more reactant forms.</u>
The time taken by the ballast bag to reach the ground is 2.18 s
The ballast bag at rest with respect to the balloon has the upward velocity (u) of 4.6 m/s , which is the velocity of the balloon. When it is dropped from the balloon, its motion is similar to an object thrown upwards with an initial velocity <em>u </em>and it falls under the acceleration due to gravity<em> g.</em>
Taking the upward direction as positive and the downward direction as negative, the following equation of motion may be used.
![s=ut+\frac{1}{2}at^2](https://tex.z-dn.net/?f=%20s%3Dut%2B%5Cfrac%7B1%7D%7B2%7Dat%5E2%20%20)
The bag makes a net displacement <em>s</em> of 13.4 m downwards, hence
![s=-13.4 m](https://tex.z-dn.net/?f=%20s%3D-13.4%20m%20)
Its initial velocity is
![u=+4.6 m/s](https://tex.z-dn.net/?f=%20u%3D%2B4.6%20m%2Fs%20)
The acceleration due to gravity acts downwards and hence it is negative.
![g=-9.8 m/s^2](https://tex.z-dn.net/?f=%20g%3D-9.8%20m%2Fs%5E2%20)
Use the values in the equation of motion and write an equation for t.
![s=ut+\frac{1}{2} at^2 \\ -13.4=4.6t-\frac{1}{2}(9.8)t^2\\ 4.9t^2-4.6t-13.4=0](https://tex.z-dn.net/?f=%20s%3Dut%2B%5Cfrac%7B1%7D%7B2%7D%20at%5E2%20%5C%5C%20-13.4%3D4.6t-%5Cfrac%7B1%7D%7B2%7D%289.8%29t%5E2%5C%5C%204.9t%5E2-4.6t-13.4%3D0%20)
Solving the equation for t and taking only the positive value for t,
t=2.18 s