The navigation rules for countries in the Unites States are compiled in the U.S. Coast Guard. There are actually boating courses that are recognized by the U.S Coast Guard. One of the things they discuss there is the emergency aids every boat should have depending on the size and purpose. For recreational vessels with lengths measuring less than 39.4 feet, they must carry aboard an efficient sound producing device. This will serve as your signal when emergencies happen and you have to get the attention of nearby boat vessels. Hence, for practical purposes, every boat should have a whistle or a horn.
The average kinetic energy of the molecules of the coffee will decrease and the speed of the individual molecules will also reduce.
<h3>
Temperature of resultant mixture</h3>
The temperature of the resultant mixture will be higher than the cold water temperature and lower than the hot coffee temperature.
Based on the decrease of the resulting temperature (equilibrium temperature) of the mixture, the average kinetic energy of the molecules of the coffee will decrease and the speed of the individual molecules of the hot coffee mixture will reduce, leading to a resultant cold mixture of coffee.
Learn more about kinetic molecular model here: brainly.com/question/2901837
None of the above
mass is measurement of how much stuff in inside something.
if you freeze or heat an object, you merely change the state of the object. the mass is conserved.
if you change the elevation, nothing happens to the mass. the stuff will not leave the object.
so it is None of the above
<u>for the question w the coffee cup and the dishwasher: </u>19,536.72 J
<u>for the question w the 3 pots of boiling water:</u> They all have the same temperature
<u>for the question w the copper: </u>103.84 Celsius
(Not sure what the other 2 pictures are about but good luck)
Answer:2.103 m/s
Explanation:
Given
mass of sports car 
mass of SUV 
Suppose u is the velocity if sports car before collision
Conserving momentum we get
After collision the combined mass drag 2.8 m and finally stops
From work energy theorem work done by friction is equal to change in kinetic energy of the combined mass system
where 
Initial velocity 
