Answer:
Option B : burning of wood
Explanation:
Chemical change is a change where a new substance is created like when you will bur wood you get ash this is a new substance, so burning of wood is a chemical change.
The answer is Sliver reacts with nitric acid to produce a gas.
Answer:
The temperatures get hotter.
Explanation:
Places closer/on the equator are facing the sun. Texas and Africa are located on the equator.
Answer:
The longer the path length, the more molecules there are in the path of the beam of radiation, therefore the absorbance goes up. As you likely know from other experiences, a particular chemical species absorbs some wavelengths of radiation and not others
Answer : The specific heat capacity of lead is, 
Explanation :
In this problem we assumed that heat given by the hot body is equal to the heat taken by the cold body.
where,
= specific heat of lead = ?
= specific heat of water = 
= mass of lead = 100.0 g
= mass of water = 150.0 g
= final temperature = 
= initial temperature of lead = 
= initial temperature of water = 
Now put all the given values in the above formula, we get
Therefore, the specific heat capacity of lead is,
