The answer is true: the pressure of a gas will decrease as temperature decreases in a rigid container.
This is one of the central gas laws called the Gay-Lussac law that states for a given gas at a constant volume, the pressure of the gas is directly proportional to its temperature. We also know that as temperature reduces, so too does molecular interaction. Increased temperature results in increased pressure, and decreased temperature therefore results in decreased pressure.
Answer:
Coefficient of friction is
.
Work done is
.
Explanation:
Given:
Mass of the box (
):
kg
Force needed (
):
N
The formula to calculate the coefficient of friction between the floor and the box is given by

Here,
is the coefficient of friction and
is the acceleration due to gravity.
Substitute
N for
,
kg for
and
m/s² for
into equation (1) and solve to calculate the value of the coefficient of friction.

The formula to calculate the work done in overcoming the friction is given by

Here,
is the work done and
is the distance travelled.
Substitute
N for
and
for
into equation (2) to calculate the work done.

Answer:
Advantages: Very sturdy, can have several cracks in structure before breaking
disadvantages: best for short distances, not attractive, hard to maintain