From tables, the density of mercury is
13545 kg/m^3 at 20°C,
13472 kg/m^3 at 50°C.
Because mass = density * volume, the mass of mercury at 20°C is
m = (13545 kg/m^3)*(0.002 m^3) = 27.09 kg
Let V = volume of mercury at 50°C.
Because the mass of mercury does not change, therefore at 50°C,
(13472 kg/m^3)*(V m^3) = 27.09
V = 27.09/13472 = 0.0020108 m^3
Answer: B. 0.002010812 m³
Answer :
The distance is 109.89 m.
Explanation :
Given that,
Height = 40 m
Angle = 20°
We need to calculate the base of the plateau
Using formula of angle

Where, h = height
x = base
= angle
Put the value into the formula



Hence, The distance is 109.89 m.
<span>When you apply force to move an
object at a distance, you are applying work. And work is energy in transit. The
answer is letter D. For example, you see a cart at a distance. You observe that
it is not moving. You want to transfer it to your backyard. You apply force to
the cart and observed that the cart is not at the same position as it was
before. You are applying work to the cart by transferring your energy to it.</span>