A copper container of mass 84 g contains 84 g of water at 10 °C.46 g of water at 100 °C is mixed with the water in the copper container. What is the final temperature of the water?
(Specific heat capacity of water
= 4 200 J kg- °C, specific heat
capacity of copper = 400 J kg-1 °C-))

A 10 °C
30 °C
B 20 °C
D 40 °C

radiation warms things up temp rises convection currents air circ windy weather

the answer would be   dignified - apex

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