<h2>Hey there! </h2>
<h2>Your answers are:</h2>
<h3>1.ans) 9.843 ft</h3>
<h3>2.ans) 30660000 hours </h3>
<h3>3.ans) 50 m/s</h3>
<h3>4.ans) 0.0543 mile</h3>
<h2>Hope it help you </h2>
Answer:

Explanation:
As we know that rms speed of ideal gas is given by the formula

here we know that

molecular mass of gas is given as

now from above formula we have

now we have

Vf=V1+at
0=31+a(7)
-31/7=a
a=-4.43m/s^2
Hope this helps.
Answer:
318.3 nm
Explanation:
We approximate the circular film as a cylinder of height h and radius, r. Its volume V = πr²h. Since this volume equals the volume of the oil drop, the height of the circular film is thus h = V/πr²
V = 10⁻¹⁰ m³ and r = 10 m
Substituting into h, we have
h = 10⁻¹⁰ m³/π(10)²
= 0.3183 × 10⁻¹² m
= 3183 × 10⁻⁹ m
= 318.3 nm