There are quite a bunch of typo errors in the question; here is the correct question below:
A thermos bottle (Dewar vessel) has an evacuated space between its inner and outer walls to diminish the rate of transfer of thermal energy to or from the bottle’s contents. For good insulation, the mean free path of the residual gas (air; average molecular mass = 29) should be at least 10 times the distance between the inner and outer walls, which is about 1.0 cm. What should be the maximum residual gas pressure in the evacuated space if T = 300 K? Take an average diameter of d = 3.1 × 10⁻¹⁰ m for the molecules in the air.
Answer:
9.57 × 10⁻⁷ atm
Explanation:
The mean free path ( λ ) can be illustrated by the equation:
λ = ---------- (1)
N/V = ------------- (2)
From the above relation, we can deduce that;
P= -------------(3)
let I= λ
From the above equations;
d= diameter of the atom
= avogadro's constant
P= pressure
R= universal rate constant which is given by 0.08206 L atm mol⁻¹ k⁻¹
T= temperature
From the question, we are given that the mean free path of the residual air molecules ( d = 3.1 × 10⁻¹⁰ m) is equal to 10cm = 0.1m
Therefore, we can determine the pressure using equation (3)
i.e
P=
=
=97.06 × 10⁻³ Pa ×
=9.57 × 10⁻⁷ atm
Therefore, the maximum residual gas pressure in the calculated space is; 9.57 × 10⁻⁷ atm
C. The body shivering is kinetic energy used to warm the body
Answer:
C
Explanation:
D: Wrong! going to bed early is a learned behavior. If someone wakes you up early enough times, you will get up early.
B: Being musical is possible that you will inherit such an ability, but I think you are intended not to give B as an answer.
A: You can learn to like favorite foods because they are being served. Favorite foods are a craving. It is like B. It might be, but I don't think you are intended to answer it.
C: is definitely an inherited quality.
Answer:
co2 oxide,nacl salt ,hcl acid
Students who spend less time studying after school, get lower math grades. Option D.
<h3>What is a research investigation?</h3>
In science, a research investigation is an organized inquiry made into phenomena in order to logically understand them. The investigation follows an established procedure, otherwise known as the scientific method.
The original investigation by the student has to do with factors that affect math grades. Conclusions are usually drawn from the aim and objectives of the research. Thus, the conclusion must relate to the aim of the research in a logical way.
The only option that fits in logically going by the aim of the investigation is that students who spend less time studying after school, get lower math grades.
More on research investigations can be found here: brainly.com/question/4118656
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