There is an exoplanet that is made of diamond. There is also an exoplanet where it rains glass. Our universe is huge, and we don't know what other planets there are. So could there be an exoplanet that is chemically made of chocolate? Our red neighboring planet is called Mars. If the chemical composition were…
Can someone explain time dilation to me in detail with an example?
It would be nice if you could explain this in detail 🙂 A 200-g glider sits on an air track, to which a 10-g mass is attached via a string and pulley. The mass hangs 0.70 m above the ground and is simply released. After 1.0 m, the sliding body encounters a coil spring clamped…
An astronaut says goodbye to his 25th birthday of his twin brother, who remains on Earth. His spaceship flies with V = 1 c to a distant planet and without Pause back again. When he arrives back on Earth, the Earth twin is celebrating his 70th birthday. How old is the astronaut? Solution according to…
After all, helium is much more common. Thanks for any answers!
(3 votes)
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(I assume for the invoice some standard conditions [0°C; 101325 Pa].)
When the plastic ball is filled with helium, it has a total mass of about…
When the plastic ball is filled with air, it has a total mass of about…
With air, the total mass is about 5.2 % higher than with helium.
With helium, the total mass is about 4.9% lower than with air.
So first you need the volume. A ball of 30cm diameter has a volume of about 0.014m3. Air has a density of about 1.2kg/m3 (depending on the temperature) and helium of about 0.18kg/m3. As a result, you win around the 14g.
Yes, if you fill the ball with helium, it is lighter throughout than when you fill it with air or water. Helium has a lower density than air.
yes the question is how much
Air has about the 7 compartments density of helium, but I have just gogled ^ but with the data you can calculate.
so I put in the question
The density of helium is about 15% of that of air. Say, when filling with helium, you save about 85% compared to filling with air.
But: Only in terms of filling! If you had 1 g of air in your ball and instead fill helium, you now have 0.15 g helium in there and have reduced the total weight of the ball by 0.85 g.
The volume of a ball with a diameter of 30 cm is about 14.1 liters. Then 16.9 g of air are introduced at normal pressure. And you can save 85% of this, i.e. 14.4 g. If this weight reduction is large enough to balance the weight of the outer shell, the ball lifts off. This is the case with a balloon.
However, if your ball shell is 300 g heavy, 14 g weight reduction does not help.
The helium does not affect the basic weight (300g)
The weight 300g refers to the plastic ball filled with air. A vacuum plastic ball would probably no longer be a ball.
The volume of your plastic ball corresponds to a rather small balloon. But as she weighs more than 2 tables of chocolate, the helium is not enough to let her fly.
The weight of the substances never changes.
I also mean the ball
The display of the scale decreases by about 15 grams.