What new tool did geologists use to estimate the changing flow rates of lava over the duration of this eruption? Hint: The answe
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The amount of heat needed to increase the temperature of a substance by 
is given by
where
m is the mass of the substance
is its specific heat capacity
is the increase of temperature
The sample of silver of our problem has a mass of
. Its specific heat capacity is 
and the increase in temperature is
Therefore, the amount of heat needed is
where
m is the mass of the substance
The sample of silver of our problem has a mass of
Therefore, the amount of heat needed is
Answer:
speed of white ball is 1.13 m/s and speed of black ball is 2.78 m/s
initial kinetic energy = final kinetic energy
Explanation:
Since there is no external force on the system of two balls so here total momentum of two balls initially must be equal to the total momentum of two balls after collision
So we will have
momentum conservation along x direction
now plug in all values in it
so we have
similarly in Y direction we have
now plug in all values in it
so we have
now from 1st equation we have
so speed of white ball is 1.13 m/s and speed of black ball is 2.78 m/s
Also we know that since this is an elastic collision so here kinetic energy is always conserved to
initial kinetic energy = final kinetic energy