Answer: A
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The mass percent composition of aluminum is 52.9% in aluminum oxide.
Mass of the aluminum = 3.53 g
Mass of the aluminum oxide = 6.67 g.
The mass percent of a substance is the mass of the substance divided by the mass of the compound into 100.
Aluminum reacts with oxygen to form aluminum oxide.
The overall balanced equation for the reaction is,
The mass percent composition of aluminum in the aluminum oxide is,
= 52.9 %
Therefore, the mass percent composition of aluminum is 52.9% in aluminum oxide.
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Answer: 0
Explanation:
Given that:
Distance walked per day = 1 mile
Starting position = front of house
Final position = front of house(initial position).
In other to aid understanding; Displacement simply refers to the shortest or least distance measured from an individual's initial position to his final point.
Here,
Assume, front of house = point A
Then , initial position = point A (front of house)
Final position, = point A (front of house)
Hence, the shortest distance between final and initial positions is :
Point A - Point A = 0
Since, starting point is the same as the final point, then Displacement = 0
Answer:
Friction can be increased the longer two objects are rubbed together, since the longer they are rubbed is the more heat produced.
Explanation:
Momentum is a vector, although we don't hammer on that. In order to completely describe a momentum, you need a magnitude AND a direction ... just like force and velocity.
So choice #2 is the magnitude of a momentum, without its direction.
<em>Choice #3</em> is the full package, with both the magnitude and the direction.
Choice #1 has units of energy, and choice #4 has units of acceleration, so neither of those can be it.
