D), increases. The object absorbs light energy which in turn (energy is energy) usually involves absorbing heat as well.
Extension of the elbow? im not sure
Answer:
8 meter telescope 16 times more gather light than 2 meter telescope.
Explanation:
The amount of light gather by the telescope is known as Light Gathering Power (LGP).
Light Gathering Power is determine by the relation:
In this problem, let l₁ and l₂ be the length of two telescopes and (LGP)₁ and (LGP)₂ be the light gathering power of two telescopes respectively. Then the ratio of their LGP is :
Substitute 8 m for l₁ and 2 m for l₂ in the above equation.
Answer:
880 kg / m^3
Explanation:
height of column of oil = 85 cm = 0.85 m
height of column of mercury = 5.5 cm = 0.055 m
Density of mercury = 13600 kg/m^2
Let teh density of oil is d.
A the height of mercury column is balanced by the height of oil column
So, the pressure due to the mercury column = pressure by teh oil column
height of mercury column x density of mercury x g = height of oil column
x density of oil x g
0.055 x 13600 x g = 0.85 x d x g
748 = 0.85 d
d = 880 kg / m^3
Answer:
4.808m
Explanation:
Force is given as:
F = ma
Since the force is a frictional force,
Fr = F
Fr = ma
Frictional force, Fr, is given as:
-umg = ma
a = -ug = -0.13 * 9.8 = -1.274 m/s²
Using one of the equations of motion, we can find the distance:
v² = u² + 2as
Since the box comes to a halt, v = 0m/s:
0 = u² + 2as
s = -u²/2a
s = -(-3.5²)/(2 * 1.274) = 4.808m