Answer:
mass-to-light ratio is the ratio of the mass of a body and the light output it has. it is represented by in terms of a single number and and tells us about the kind of stars making up the most luminous population in a galaxy. the mass-to-ratio of stars is greater than 1, for dark matter is 100 times high and very low for dust. higher mass-to-ratio mean that in a galaxy on average every solar mass emits a light less than the sun of the earth solar system does.
the large mass-to-light ratio shows that gas and dust is being analyzed.
To solve the problem, you should first convert the 20ft to
meters so it is much easier.
20 feet is equals to 6 meters; rounded off to the nearest
whole number.
Solution:
V1 = v
V2 = 0
T1 = ½ mv^2
T2 – 0
U 1-2 = -mgh
d = 6m
--AB^2 = (10m)^2 = d^2 + y^2 = (6m)^2 = y^2
Y^2 = 100 – 36 = 64
Y = sqrt64
h = 10 – y = 10 – sqrt64 = 10 – 8 = 2 m
U 1- 2 = -m (9.81) (2) = -19.62
T1 + U1-2 = T2
1/2mv^2 – 19.62m = 0
v^2 = (2) (19.62) = 39.24
32.5 kg of air
Explanation:
To calculate the mass of the air, we use the density formula:
density = mass / volume
mass = density × volume
density of air = 1.3 kg/m³
volume = 5 × 3 × 2 = 25 m³
mass of the air = 1.3 kg/m³ × 25 m³
mass of the air = 32.5 kg
Learn more about:
density
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Answer:
Explanation:
The collision is elastic as no frictional force exists .
Both momentum and energy will be conserved.
We shall apply velocity formula applicable in respect of elastic collision
m₁ and m₂ be mass of red and green T shirt player , u₁ and u₂ be their initial velocity , v₁ and v₂ be their final velocity
v₂ = (m₂-m₁)u₂ / ( m₁+m₂) + 2 m₁u₁ / ( m₁+m₂)
Given m₁ = 40 kg , m₂ = 60 kg , v₂ = 2 m /s , u₁ = ? , u₂ = 0
Put the values in the equation
2 = 0 + 2 x 40 x u₁ / ( 40 + 60 )
u₁ = 2.5 m /s .
Initial speed of red T- shirt .