Answer:
r = -11.6 cm
Explanation:
As we know that the position of center of mass is given as
now we know that three masses are on the left while two are on the right
position of left most mass with respect to the center of the rod is given as
Now we will have
In order to work out this question, we must know the momentum of the marbles.
Marble 1 momentum:
Momentum1 = mass * velocity
Momentum1 = 5 * 5
Momentum1 = 25g cm/s.
Marble 2 momentum:
Momentum2 = mass * velocity
Momentum2 = 5 * 0
Momentum2 = 0g cm/s
Therefore, the total momentum of the marbles is equal to 25g cm/s.
Momentum is ALWAYS conserved in a collision! Meaning, the momentum before and after the marbles hit must be equal. Since marble 1 comes to a complete rest and there is no mention of a change in mass, Marble 2’s velocity must equal 5m/s due to conservation of momentum!
:)
Answer:
123.18 nm
Explanation:
Given:
- Refractive index of the glass=1.5
- Index of magnesium fluoride=1.38
- Wavelength of the light =680 nm
Let t be the thickness of the film. The relation between the wavelength of light in film and thickness of the film in order to have no reflection is given by
Now According to question we have
where n is the refractive index of the film.
Now thickness t is given by
Hence the thickness of the film is calculated in order to have no reflection.
Specific heat capacity.
As it has a greater specific capacity than wood, it takes more heat energy to increase it's temperature by 1 degree Celsius than that of wood. Hence, though both are at the same temperature, sand contains way more heat than wood.
Answer:
I need to be still. 450 miles an hour. That was stupid of him lol.
Explanation: