In a student experiment, a constant-volume gas thermometer is calibrated in dry ice (-78.5°c) and in boiling pentane (36.1°c). the separate pressures are 0.890 atm and 1.423 atm. hint: use the linear relationship p = a + bt, where a and b are constants.
a. what value of absolute zero does the calibration yield?
°c
b. what pressure would be found at the freezing point of water?
atm
c. what pressure would be found at the boiling point of water?
atm

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