B.
carbon dioxide molecules have more energy; therefore, the kinetic energy increases
Answer:
0.65 kg*m/s and 0.165 kg*m/s
Explanation:
Step one:
given data
mass m= 0.5kg
initial velolcity u=1.3m/s
final velocity v= 0.97m/s
Required
The change in momentum
Step two:
We know that the expression for impulse is given as
Ft= mv
Ft= 0.5*1.3
Ft= 0.65 kg*m/s
The expression for the change in momentum is given as
P= mΔv
substitute
Pt= 0.5*(1.3-0.97)
Pt= 0.5*0.33
Pt=0.165 kg*m/s
<span>Foods cook faster when placed in a pressure cooker.
This is because in the pressure cooker, the pressure on the surface
of the water is greater than the normal atmospheric pressure. Under
those conditions, the boiling temperature of water is increased.
So the food can be heated to a greater temperature than the normal
boiling point of water. That means that the food gets hotter, and it
cooks through and through faster.</span>
Answer:
You are exactly right. The molecules in hot air are moving faster than the molecules in cold air. Because of this, the molecules in hot air tend to be further apart on average, giving hot air a lower density. That means, for the same volume of air, hot air has fewer molecules and so it weighs less