Any part of an experiment that cannot be changed is considered to be a(n)

A wind turbine generating electricity involves electromagnetic energy. thermal energy. solar energy. mechanical energy. chemical energy. nuclear energy.

ans: electromagnetic energy, thermal energy, solar energy, and mechanical energy.

Explanation:

Wind mill

It consist of shaft pole and blades that can rotate .

It converts wind energy into electrical energy .

The shaft of wind mill is connected to shaft of armature of generator .

When the fast moving wind rotates the blades of windmill its shaft rotates, armature rotates hence electricity is produced which is further used for various purposes .  

Advantage of using wing energy

it is natural renewable resource  

It is eco friendly  

Disadvantage :

1. It cant be established everywhere  

2. It requires large area  

3. It is an expensive project  

4. Wind dosen't blow all the time so win energy cant be produced every time  

5. Minimum speed of wind required is 15km per hour .

So, the wind turbine generating electricity involves mechanical energy of wing and blades .

Answer:

A wind turbine generating electricity involves :

1. electromagnetic energy.

2. thermal energy.

3. solar energy.

4. mechanical energy.

Explanation:

this is correct for edge2020

Answer:  

P₅O₁₂

Explanation:  

Assume that you have 100 g of the compound.  

Then you have 44.7 g P and 55.3 g O.  

1. Calculate the moles of each atom  

Moles of P  = 44.7 × 1/30.97 = 1.443 mol Al  

Moles of O = 55.3 × 1/16.00 = 3.456 mol O  

2. Calculate the molar ratios.  

P: 1.443/1.443 =   1  

O: 3.456/1.443 = 2.395

3. Multiply by a number to make the ratio close to an integer

P:  5 × 1         =  5

O: 5 × 2.395 = 11.97

3. Determine the empirical formula

Round off all numbers to the closest integer.  

P:   5

O: 12

The empirical formula is P₅O₁₂.  

The given mass of cobalt chloride hydrate = 2.055 g

A sample of cobalt chloride hydrate was heated to drive off waters of hydration and the anhydrate was weighed.

The mass of anhydrous cobalt chloride = 1.121 g anhydrate.

The mass of water lost during heating = 2.055 g - 1.121 g = 0.934 g

Converting mass of water of hydration present in the hydrate to moles using molar mass:

Mass of water = 0.934 g

Molar mass of water = 18.0 g/mol

Moles of water =