6) (5p) an ice crystal in form of a thin hexagonal plate grows by diffusion in an environment saturated with respect to water at a temperature of -4°c and a pressure of 80 kpa. a) determine the time required for it to grow to a diameter of 1 mm, starting from a mass of 10-s kg. take the geometry factor to be that of a circular disk. assume that mass and diameter of the plate are related by m = 1.9 × 10-2 , with mass in gram and d in cm. neglect ventilation effects. (2p) b) if diameter and fall speed are related by u = c* d (with c = 520 s-1), determine the distance the crystal falls during the growth to 1 mm diameter. (2p) c) why is knowledge of the mass-size relation so important in cloud microphysics? (1p)

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

energy stored in the capacitor= 9.72 x 10⁻⁴ j

explanation:

the energy stored in the capacitor is given by

e= 1/2 c v²

e= energy stored

c= capacitance= 1.5 µc= 1.5 x 10⁻⁶f

v= potential difference=36 v

so energy stored= e= 1/2 (1.5 x 10⁻⁶) (36)²

energy stored= 9.72 x 10⁻⁴j

conduct current i mean it makes sense