I'm. begging begging from y'all help me pls if volume of an object is "V" density of fluid "p" and gravitational acceleration is "g". derive an expresion for upthrust (u) exert on the object in terms of V, p,g. when an object is fully immersed in water

Hey there mate ;),

Given:

V = volume

p (rho) = density of fluid

g = gravitational acceleration

To derive expression for upthrust, we have:

Upthrust = V×p×g

→ u = V×p×g

Therefore the expression for upthrust exerted on object in terms of Volume, rho and acceleration is :-

u = V×p×g

b) phosphorus pentoxide

the minimum constant speed at which she can catch the train is 2.7 m/s

given:

acceleration = 0.6

time = 4.5 s

to find:

velocity = ?

formula used:

from 1st kinematic equation we get,

v = u + at

u = initial speed of train = 0 m/s

v = final speed of the train

a = acceleration of the train

t = time

solution:

from 1st kinematic equation we get,

v = u + at

u = initial speed of train = 0 m/s

v = final speed of the train

a = acceleration of the train

t = time

v = 0 + (0.6 × 4.5)

v = 2.7 m/s

the minimum constant speed at which she can catch the train is 2.7 m/s