4. 100 grams of ice at -15 degrees C are placed in a container. How much heat in joules must be added to do the following?
(1) Raise the temperature of the ice to 0 degrees C (C for ice is= 2.1 J/gC);
(2) Melt the ice;
13) Heat water from 0 degrees C to 100 degrees C;
(4) Change 100 deg water to steam.

that tool is called an altimeter which measures your altitude which can be used to tell which atmosphere you are currently in, including the stratosphere.

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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

490 n

f=125n a=2.5m/s2