Answer:
the second process of using the the shovel to move the snow as it takes a longer time meaning more power is expended
Answer
The Little Bee will have a greater force of 12N
<u>Explanation</u>
As we know that Force is equal to the product of mass and acceleration (F=ma)
The Force with which the Big Bee will hit the windshield = (5kg x 2m/s^2)
Force of Big Bee= 10 Newton (N)
The Force with which the Little Bee will hit the windshield = (3kg x 4m/s^2)
Force of Little Bee = 12N
Hence, the little bee will hit the windshield with a greater force.
<span>(kg) Melting Point of Tin
</span>
Answer:
Explanation:
The heat required to change the temperature of steam from 125.5 °C to 100 °C is:
The heat required to change the steam at 100°C to water at 100°C is;
The heat required to change the temperature from 100°C to 0°C is
The heat required to change the water at 0°C to ice at 0°C is:
The heat required to change the temperature of ice from 0°Cto -19.5°C is:
The total heat required to change the steam into ice is:
b)
The time taken to convert steam from 125 °C to 100°C is:
The time taken to convert steam at 100°C to water at 100°C is:
The time taken to convert water to 100° C to 0° C is:
The time taken to convert water at 0° to ice at 0° C is :
The time taken to convert ice from 0° C to -19.5° C is:
Answer:
(E) Second law of thermodynamics
Explanation:
The second law of thermodynamics can be understood according to Clausius' words: In an isolated system, no process can occur if a decrease in the total entropy of the system is associated with it. These processes are associated with energy transformations, in which a variable is introduced, called entropy that indicates the notion of disorder. Therefore, in any isolated process, the disorder can only grow.
