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15 Cards in this Set
- Front
- Back
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physical properties of matter |
mass weight volume lenght
color hardness luster ect... |
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conservation of matter |
matter cannot be created or destroyed in an isolated system |
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signs of a chemical reactoin |
1. change in color 2. change in smell 3.formation of gas 4. change in temperature 5. energy produced 6. change in percipitate |
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atom structure |
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speed, distance time relationship |
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acceleration |
is a vector quantity that is defined as the rate at which an object changes its velocity. An object is accelerating if it is changing its velocity. |
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relative motion |
apply when you are at rest on the earth also apply when you are in any reference frame which is moving at a constant velocity with respect to the earth.
For example, you can toss and catch a ball in a moving bus if the motion is in a straight line at constant speed. |
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Centripetal force |
any motion in a curved path represents accelerated motion, and requires aforce directed toward the center of curvature of the path. This force is called the centripetal force which means "center seeking" force. The force has the magnitude |
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Newton's Universal Law of Gravitation |
states that any two bodies in the universe attract each other with a force that is directly proportional to the product of their masses and inversely proportional to the square of the distance between them. |
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forms of energy |
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Potential Energy |
potential energy is energy stored in a system of forcefully interacting physical entities
ex: peddling a bike up a hill |
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Kinetic Energy |
which it possesses due to its motion. It is defined as the work needed to accelerate a body of a given mass from rest to its stated velocity
ex: bike rolling down a hill |
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simple Machines |
A simple machine is a non-motorized device that changes the direction or magnitude of a force. In general, a simple machine can be defined as one of the simplest mechanisms that provide mechanical advantage.
ex: ledge pully lever |
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The law of reflection |
Objects can be seen by the light they emit, or, more often, by the light they reflect. Reflected light obeys the law of reflection, that the angle of reflection equals the angle of incidence. |
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Refraction |
The change in speed that occurs when light passes from one medium to another is responsible for the bending of light, or refraction, that takes place at an interface. |
