Answer:
Explanation:
We shall apply Pascal's Law in fluid mechanics
According to it , pressure is transmitted in liquid from one point to another without any change .
25 cm diameter = 12.5 x 10⁻² m radius
Area = 3.14 x (12.5 x 10⁻²)²
= 490.625 x 10⁻⁴ m²
Pressure by vehicle
Force / area
13000 / 490.625 x 10⁻⁴
= 26.497 x 10⁴ Pa
5 cm diameter = 2.5 x 10⁻² radius
area = 3.14 x (2.5 x 10⁻²)²
= 19.625 x 10⁻⁴ m²
If we assume required force F on this area
Pressure = F / 19.625 x 10⁻⁴ Pa
According to Pascal Law
F / 19.625 x 10⁻⁴ = 26.497 x 10⁴
F = 19.625 x 26.497
= 520 N
Answer:
C. balancing the amount of energy that is taken in with the amount of energy that is released by the body
Explanation:
im smart
Answer:
option C
Explanation:
given,
Period of oxygen molecule = 6 s
number of molecule = 6 x 10²³
Area of wall = 2 cm²
speed of molecule = 400 m/s
mass of O₂ molecule = 5.344 × 10⁻²⁶ Kg
we know,
Δp= F Δt
Δp change in momentum
Δp = N.m.Δv
where N is the number of oxygen molecules strike a wall
Δv = v - (-v)= 2 v
Pressure,
P = 21376 Pa
P = 21.4 kpa
hence the correct answer is option C