It is important to understand the differences between chemical and physical changes. chemical changes result in new substances, but physical changes do not. which process is an example of a physical change?
f) water turns to steam when boiled over a bunsen burner.
g) carbon combines with oxygen to form carbon dioxide gas.
h) water breaks down into hydrogen and oxygen gases.
i) limestone breaks down into lime and carbon dioxide when heated.
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Physics, 22.06.2019 12:10
Two forces produce equal torques on a door about the door hinge. the first force is applied at the midpoint of the door; the second force is applied at the doorknob. both forces are applied perpendicular to the door. which force has a greater magnitude?
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Physics, 22.06.2019 18:00
According to newton’s law of universal gravitation, which statements are true? as we move to higher altitudes, the force of gravity on us decreases. as we move to higher altitudes, the force of gravity on us increases. as we gain mass, the force of gravity on us decreases. as we gain mass, the force of gravity on us increases. as we move faster, the force of gravity on us increases.
Answers: 2
Physics, 23.06.2019 10:00
The molecular weight of oxygen gas (o2) is 32 while that of hydrogen gas (h2) is 2. prove that under same physical conditions, the velocity of sound in hydrogen is four times that in oxygen
Answers: 1
It is important to understand the differences between chemical and physical changes. chemical change...
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