Al₂O3 + O₂ --
Ah + O₂
Answer:
2Al2O3 → 4 Al + 3 O2
Explanation:
Souring
Melting
Boiling
Freezing
Answer:
melting, freezing, and boiling are physical changes
Explanation:rusting and souring are ex. of chemical, not physical
Answer:
melting boiling frezzing
Explanation:
Answer:
The kinetic energy at the 0.500 position is 1.96 J.
Explanation:
Mass of the vase = 0.800 kg
Height from where vase fallen = 0.750 m
Potential energy of vase at 0.750 m:
Kinetic energy of the vase at the point just before it was about to fell:
(absence of motion)
P.E + K.E = 5.88 J + 0 J = 5.88 Joules
Potential energy of vase at 0.500 m:P.E'
Kinetic energy of the vase at the point 0.500 m above the floor: K.E'
As we know, that sum of P.E and K.E remains constant.;
P.E' + K.E' = 3.92 J + K.E' = 5.88 J
K.E' = 5.88 J - 3.92 J = 1.96 J
The kinetic energy at the 0.500 position is 1.96 J.
Answer: The kinetic energy of vase at 0.500 m position is 1.96 J
Explanation:
Law of conservation of energy states that energy can neither be created nor be destroyed but it can only be transformed from one form to another form.
Here, the potential energy of the vase is getting converted into kinetic energy of the vase
So, calculating the potential energy of vase, we use the equation:
P = mgh
where,
m = mass of vase = 0.800 kg
g = acceleration due to gravity =
h = height of vase = (0.750 - 0.500) m = 0.250 m
Putting values in above equation, we get:
At 0.500 m, the potential energy gets converted to kinetic energy.
Kinetic energy of the vase = 1.96 J
Hence, the kinetic energy of vase at 0.500 m position is 1.96 J
Electric current passes through a filament of an incandescent bulb, thereby increasing it temperature. When current flows, it contains electrons through the filament to produce light. Typically, incandescent light bulb consists of a glass enclosure that contains tungsten filament. The glass enclosure contains either a vacuum or an inert gas that serves as the filament protection from evaporating. Incandescent light bulbs contain a stem attached at to its base to allow the electrical contacts to run through the envelope without gas or air leaks.