<span>A. An impulse of a force changes the momentum of a body and has the same units and dimensions as momentum.</span>
Explanation:
<h2>When we decrease the temperature, less heat energy is supplied to the atoms, and so their average kinetic energy decreases. When they enter a phase transition, such as freezing from a liquid to a solid, the temperature is not decreasing or increasing, and stays constant</h2>
Answer:
The activation energy is
Explanation:
From the question we are told that
The rate constant is k
at the temperature 
The value of k is 
at temperature 
The value of k is 
The rate constant is mathematically represented as

Where Q is the activation energy
R is the ideal gas constant with a value of 
C is a constant
T is the temperature
For the first rate constant

For the second rate constant

Now the ratio between the two given rate constant is
![\frac{k_1 }{k_2} = e^{(\frac{Q}{R} [\frac{1}{\frac{T_2 - 1}{T_1} } ] )}](https://tex.z-dn.net/?f=%5Cfrac%7Bk_1%20%7D%7Bk_2%7D%20%20%3D%20%20e%5E%7B%28%5Cfrac%7BQ%7D%7BR%7D%20%5B%5Cfrac%7B1%7D%7B%5Cfrac%7BT_2%20-%201%7D%7BT_1%7D%20%7D%20%5D%20%29%7D)
=> ![ln [\frac{k_1}{k_2} ] = \frac{Q}{R} * [\frac{1}{\frac{T_2 -1}{T_1} } ]](https://tex.z-dn.net/?f=ln%20%5B%5Cfrac%7Bk_1%7D%7Bk_2%7D%20%5D%20%3D%20%20%5Cfrac%7BQ%7D%7BR%7D%20%20%2A%20%5B%5Cfrac%7B1%7D%7B%5Cfrac%7BT_2%20-1%7D%7BT_1%7D%20%7D%20%5D)
substituting values
![ln [\frac{1.05 *10^{-8}}{2.95 *10^{-4}} ] = \frac{Q}{8.314} * [\frac{1}{\frac{673 -1}{573} } ]](https://tex.z-dn.net/?f=ln%20%5B%5Cfrac%7B1.05%20%2A10%5E%7B-8%7D%7D%7B2.95%20%2A10%5E%7B-4%7D%7D%20%5D%20%3D%20%20%5Cfrac%7BQ%7D%7B8.314%7D%20%20%2A%20%5B%5Cfrac%7B1%7D%7B%5Cfrac%7B673%20-1%7D%7B573%7D%20%7D%20%5D)
=> 
Answer:

Explanation:
Since the cardinal and ball have the same kinetic energy, it is possible to determine the ratio between speeds. (c for cardinal, b for baseball)



The ratio is obtained by multiplying each side by
:


The value of this ratio is:
