A helium-filled weather balloon is held at ground level. The volume of the balloon is 4800 m. The pressure of the helium is 98 kPa.
Ihe balloon is released and rises to a height where the volume of the balloon is 7200 m.
(0 Calculate the new pressure of the helium. Assume that the temperature stays constant.
[21
pressure =
​

simply answer plvl=p2v2 vl =4800 p1 =98kpa

Explanation:

p2=? v2=7200m p2=plvl÷v2 thensimply you can answer it

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.