Correct position spring hold it
Answer:
b) se duplica
Explanation:
The disk is moving with constant angular velocity, let's call it
.
The linear velocity of a point on the disk is given by

where r is the distance of the point from the axis of rotation.
In this problem, the object is moved at a distance twice as far as the initial point, so

Therefore, the new linear velocity is

So, the velocity has doubled, and the correct answer is
b) se duplica
1) 5765 mol
First of all, we need to find the volume of the gas, which corresponds to the volume of the room:

Now we can fidn the number of moles of the gas by using the ideal gas equation:

where
is the gas pressure
is the gas volume
n is the number of moles
R is the gas constant
is the gas temperature
Solving for n,

2) 184 kg
The mass of one mole is equal to the molar mass of the oxygen:

so if we have n moles, the mass of the n moles will be given by

since n = 5765 mol, we find

Answer:
T₂ = 305.17 K
Explanation:
Given that,
Heat, Q = 6000 J
Mass, m = 200 gram
Initial temperature, T₁ = 25° C
We need to find its final temperature. Let it is T₂.
We know that,

Where
c is the specific heat of water, c = 4.18 J/g°C
So,

So, the final temperature is equal to 305.17 K.
Potable water is also known as drinking water which is safe to drink and for cooking purposes