Answer:
3. Silver tarnishes when exposed to air and light
Explanation:
Physical properties are properties that change substances in ways that is visible to a human by using their senses (ie. see, touch, etc)
The rest of the answers are chemical properties, which cannot be seen with the human senses, and requires other special devices or techniques to tell.
-Vibilities
Answer:
The density is 1.3 kg per cubic meter
Explanation:
Density is mass divided by volume, so:
8.5-2 = mass of paint (kg)
5 = volume (L)
P = 6.5/5
To solve this problem we will apply the concepts related to the work theorem for which it is defined as the product of Force and distance. In turn, we will use the energy conservation theorem for which the applied work must be equivalent to the total kinetic energy on the body.
The work is defined as
Here,
F = Force
d = Displacement
Replacing with our values we have that
Now by conservation of energy,
Solving for v,
Therefore the correct answer is D.
the purpose of using a chemical equation is to know the reactants and products that occur.
reactants=starting material
products=end result