Suppose you have a 8.2 cm diameter fire hose with a 3.2 cm diameter nozzle. calculate the pressure drop due to the bernoulli effect as water enters the nozzle from the hose at the rate of 40.0 l/s. take 1.00 × 10^3 kg/m^3 for the density of the water.

1207.811 KPa

Explanation:

Given

Nozzle and hose are at same level thus

Applying Bernoulli's equation

thus

Also discharge (Q)=AV

this could be newton#'s law of cooling. the cooling curve is exponential

force is based upon mass and acceleration.the statement is not always true.

it can be explained from newton's second law of motion.

as per newton's second law of motion the rate of change of momentum is directly proportional to the applied force and takes place along the direction of force.

mathematically it can be written as -

                                              ⇒      

here   k is the proportionality constant whose value is 1.

                                                            [a is the acceleration=dv/dt]

hence we see that force not only depends on mass and acceleration but also on velocity and rate of change of mass. force f will depend on mass and acceleration only when mass is constant.

hence the statement that force is based upon mass and acceleration is false.