Answer:
Here's what I get
Explanation:
Potassium is in Group 1 and Period 4 of the Periodic Table.
Group 1 elements are called alkali metals.
In general, alkali metals have the following physical properties:
- Silvery white
- Soft enough to cut with a knife
- Relatively low melting points
- Good conductors of heat and electricity.
Their most obvious chemical properties are that they are highly reactive.
They react with atmospheric oxygen to form a dull coating of the metal oxide.
They all react with water to form hydrogen and a basic metal hydroxide.
The reaction of potassium with water (below) is quite vigorous.
Answer:
<em>The power output of the engine is 1,000 Watt</em>
Explanation:
<u>Mechanical Power
</u>
Power is the amount of energy transferred or converted per unit of time. In the SI, the unit of power is the watt, equal to one joule per second.
The power can be calculated as:
Where W is the work and t is the time.
The engine does a work of W=60,000 J during t=60 s. Calculate the power:
P = 1,000 Watt
The power output of the engine is 1,000 Watt