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3 years ago

Why do astronauts train underwater

Physics

2 answers:

nexus9112 [7]3 years ago

8 0

They train underwater also to simulate an amount of resistance similar to that of space.

wel3 years ago

5 0

Well that is b/c the atmosphere and environment is the same. like for example you know how its not easy to maneuver its similar to space. another thing is the supply you need in water is similar to space you need oxygen tanks for both

You might be interested in

What times what equals 400

Radda [10]

If you're willing to consider fractions or decimals,
then there are an infinite number of answers.
Like (2.5 x 160), and (15 x 26-2/3).

If you want to stick to only whole numbers,
then these 8 combinations do:

1, 400
2, 200
4, 100
5, 80
8, 50
10, 40
16, 25
20, 20

7 0

4 years ago

What is the weight of an object a mass of 90.0kg?

Natasha2012 [34]

Explanation:

it would be 198.4

you're welcoms

5 0

3 years ago

A spring with spring constant 31 N/m is attached to the ceiling, and a 4.5-cm-diameter, 1.5 kg metal cylinder is attached to its

aalyn [17]

Answer:

0.315758099469 m

Explanation:

m = Mass of cylinder = 1.5 kg

$\rho$ = Density of water = 1000 kg/m³

V = Volume = Ah

A = Area = $\pi r^2$

k = Spring constant = 31 N/m

x = Displacement

g = Acceleration due to gravity = 9.81 m/s²

Here the forces are conserved

Weight of cylinder = Buoyant force + Spring force

$mg=\rho Vg+kx\\\Rightarrow mg=\rho Ahg+kx\\\Rightarrow 1.5\times 9.81=1000\times \pi(2.25\times 10^{-2})^2x\times 9.81+31x\\\Rightarrow 1.5\times 9.81=46.60213x\\\Rightarrow x=\dfrac{1.5\times 9.81}{46.60213}\\\Rightarrow x=0.315758099469\ m$

The length of the submerged cylinder is 0.315758099469 m

4 0

4 years ago

Complete the paragraph to compare Uranus and Neptune.

kipiarov [429]

Answer:

Uranus and Neptun are outer planets od the Solar system, since they are located after the asteroid belt. All of these outer planets are much larger then the inner ones so they are called the "ice giants". The other reason for this name is that they are very far from the Sun, so their temperature is low. Another feature they have in common is their atmosphere which is composed of gases, including methane, which is responsible for their blue color, since methane absorbs red light. However Neptune is known for very fast winds and storms in its atmosphere which is responsible for its high activity and changes.

So, the blanks should be filled with:

Sun

methane

Neptune

outer planets

5 0

4 years ago

A closed system contains 30g of gas. How much heat(in joules) is added to or rejected by the system to produce 5000 N-m of work

finlep [7]

Answer : The heat rejected by the system is 1000 J

Explanation :

As per first law of thermodynamic,

$q=\Delta U+w$

where,

$\Delta U$ = internal energy of the system

q = heat added or rejected by the system

w = work done of the system

First we have to determine the internal energy for 30 grams of gas.

As, 1 gram of gas has internal energy = 200 J

So, 30 grams of gas has internal energy = 200 × 30 = 6000 J

Now we have to determine the heat of the system.

$q=\Delta U+w$

$\Delta$ = -6000 J

w = 5000 N.m = 5000 J

Now put all the given values in the above formula, we get:

$q=-6000J+5000J$

$q=-1000J$

The negative sign indicate that the heat rejected by the system.

Hence, the heat rejected by the system is 1000 J

8 0

3 years ago