Number 2. This is a power plant windmill. Kinetic energy from the wind is being converted to mechanical energy.
Number 3. Those are energy power plants which involve coal being burned. Chemical energy is being converted to heat energy and then into kinetic energy.
Number 3. You're welcomed to use whatever object you'd like. An example you could put is a car. Chemical energy is being converted to mechanical energy.
Hope that helps. -UF aka Nadia
Answer:
The over all reaction :
The standard cell potential of the reaction is 0,.897 Volts.
Explanation:
Reduction at cathode :
..[1]

Reduction potential of
to 
Oxidation at anode:
.[2]

Reduction potential of
to 
To calculate the
of the reaction, we use the equation:

Putting values in above equation, we get:


The over all reaction : 2 × [1] + [2]
The standard cell potential of the reaction is 0,.897 Volts.
Answer:
<h2>2 m</h2>
Explanation:
The wavelength of a wave can be found by using the formula

where
c is the speed of the wave
f is the frequency
From the question
c = 5 m/s
f = 2.5 Hz
We have

We have the final answer as
<h3>2 m </h3>
Hope this helps you
Explanation:
The given data is as follows.
Density of vinegar = 1.0 g/ml
Specific heat capacity = 4.25 
=
, and
= 
Relation between enthalpy and specific heat is as follows.

Hence, putting the values into the above formula as follows.

=
(as density =
)
= - 315 J
Thus, we can conclude that the enthalpy of reaction is -315 J.
As the value is negative so, it means that heat is releasing. Hence, the reaction is exothermic in nature.
Answer:
work done = force multiplied by distance covered,which is 500n multiplied by 20 m= 10000nm
power= work done/time
p= 10000/10
p=1000