Which organism lived on Earth during the Paleozoic era? A. trilobite B. dinosaur C. pine tree D. octopus

Answer:

Chloride ion

Explanation:

The anion present in the unknown solution would be chloride ions.

A white precipitate of silver chloride is usually formed when drops of silver nitrate are added to a solution containing chloride ions. The ionic equation is as below:

Answer:

The time saved on a ten mile trip by traveling at 60 mph instead of 55 mph is 54 seconds

Explanation:

Velocity ​​is a physical quantity that expresses the relationship between the space traveled by an object, the time used for it and its direction. So velocity is the change in position of a body over time:

The mile per hour (mph) is a unit of speed measurement that expresses the number of international miles traveled per hour.

From the definition of speed it can be deduced that the time it takes to travel a certain distance at a constant velocity is:

velocity*time=position

Then, if the position is 10 miles and the velocity is 55 mph:

time=0.1818 hours

If 1 hour is 60 minutes, the time can be expressed as:

time=0.1818 hours*60 minutes= 10.90 minutes

The position is now constant at 10 miles, but the speed is 60 mph. So the time it takes to travel that distance at that speed is:

time=0.166 hours

If 1 hour is 60 minutes, the time can be expressed as:

time=0.166 hours*60 minutes= 10 minutes

To calculate the time you will save, the subtraction of both times obtained is performed:

10.9 minutes - 10 minutes= 0.9 minutes

If 1 minute is 60 seconds, the time can be expressed as:

0.9 minutes*60 seconds= 54 seconds

The time saved on a ten mile trip by traveling at 60 mph instead of 55 mph is 54 seconds

Time = Distance/Rate

for 60 mph

Time = 10 miles/60 mph

= 0.1666 * 60 minutes = 10 minutes

for 55 mph

Time = 10 miles/55 mph

= 0.181818 * 60 minutes = 10.90 minutes