All categories

2 years ago

Helium is an inert gas used in lighter-than-air crafts like blimps because

Physics

1 answer:

lara [203]2 years ago

5 0

Answer:

D. a nonrenewable resource

Explanation:

From the description given, helium is a non-renewable resource.

A non-renewable resource is one in which cannot be replenished by natural processes as they consumed.
They get depleted as they are removed from nature.
Helium formation cannot match its consumption if exploited.

You might be interested in

If a transparent blue filter is placed over a camera lens, what happens to visible light entering it

Leya [2.2K]

Answer:

Explanation:

If you pass white light through a blue filter, then only blue color will appear on the other end. This is because a blue filter will only allow blue light through it. And will absorb other color. In other words the rest colors would disappear. Hence the camera would receive just blue light. This phenomenon is referred to as color by subtraction.

5 0

2 years ago

125 cm of gas are collected at 15 °C and

aleksklad [387]

The new volume will be ≈26mL
rounded to two significant figures.
Explanation:
This question involves the combined gas law. The equation to use is:
When working with gas laws, the temperature is always in Kelvins. To get Kelvins from a Celsius temperature, add 273.15 to the Celsius temperature.

6 0

2 years ago

What would most likely cause the future acceleration of the expansion of the universe

irga5000 [103]

Answer:

never scared

that might help you

3 0

2 years ago

Two concrete spans of a 380 m long bridge are

Mazyrski [523]

Answer:

4.163 m

Explanation:

Since the length of the bridge is

L = 380 m

And the bridge consists of 2 spans, the initial length of each span is

$L_i = \frac{L}{2}=\frac{380}{2}=190 m$

Due to the increase in temperature, the length of each span increases according to:

$L_f = L_i(1+ \alpha \Delta T)$

where

$L_i = 190 m$ is the initial length of one span

$\alpha =1.2\cdot 10^{-5} ^{\circ}C^{-1}$ is the temperature coefficient of thermal expansion

$\Delta T=20^{\circ}C$ is the increase in temperature

Substituting,

$L_f=(190)(1+(1.2\cdot 10^{-5})(20))=190.0456 m$

By using Pythagorean's theorem, we can find by how much the height of each span rises due to this thermal expansion (in fact, the new length corresponds to the hypothenuse of a right triangle, in which the base is the original length of the spand, and the rise in heigth is the other side); so we find:

$h=\sqrt{L_f^2-L_i^2}=\sqrt{(190.0456)^2-(190)^2}=4.163 m$

4 0

3 years ago

Pls heplp 70 points!!!!!

Rasek [7]

Answer

the answer is d for sure

5 0

2 years ago