A-level physics definition. All Definitions Needed For A Level 2019-01-14

A-level physics definition Rating: 7,2/10 601 reviews

Definitions of Stress, Strain and Youngs Modulus

a-level physics definition

Remember how I said that all fluids flow? This is because extension of an object is not only dependent on the material but also on other factors like dimensions of the object e. A scale and unit of measurement of , also known as Centigrade. A high-energy, high-speed or emitted by certain types of radioactive atomic nuclei. How hard it is to change the motion of an object. Also called atomic mass number or nucleon number. Also called angular kinetic energy. The principle of conservation of momentum states that the total momentum of a system of objects remains constant provided no resultant external force acts on the system.

Next

GCE A' Level Physics Definitions Flashcards

a-level physics definition

However, in an , the anode is the wire or plate having excess positive charge, so named because negatively charged tend to move towards it. A numerical description of how far apart objects are. Figure 1: Refraction of Light B. Quantum mechanics departs from classical mechanics primarily at the of and length scales. It is connected in series with the components.


Next

OCR A

a-level physics definition

The light then travels down the fibre through a series of reflections before exiting at the other end. Energy can be neither created nor destroyed but only changed from one form to another. In our analogy, height relates to potential difference and rock weight relates to the amount of charge. Critical angle is illustrated in Figure 3. Two approximate equalities that deal with the current and voltage in electrical circuits. A systematic enterprise that builds and organises knowledge in the form of testable explanations and predictions about the universe. Angular frequency of a periodic motion is the rate of change of angular displacement with respect to time.

Next

Resistance and Resistivity

a-level physics definition

Upthrust A force experienced due to the pressure difference of the fluid at the top and bottom of the immersed portion of the body. An species characterized by the specific composition of its , i. It reflects inside, following the law of reflection. The amount of energy difference depends on the size of the rock and the height of the cliff P. Ohm's Law The current through a resistor is varied, while the p. The fraction of the total incident on a reflecting surface, especially a , which is reflected back in all directions.

Next

A

a-level physics definition

After it has been transferred, energy is always designated according to its nature. States that the current through a conductor between two points is directly proportional to the potential difference across the two points. A The sum total of or and within an. The set of physical phenomena associated with the presence and flow of. The abstract study of topics encompassing quantity, structure, space, change, and other properties. Triangle of forces If three forces are acting at a point that can be represented by the sides of a triange, the forces are in equilibrium.

Next

energy

a-level physics definition

Vaporisation The amount of heat energy required for a phase change of 1 kg of the mass of a substance from liquid to gas or from gas to liquid, without a change in temperature. Units: Hertz Hz or s -1 A compression is a region where particles are close to one another. Unlike fermions, there is no limit to the number of bosons that can occupy the same. Pressure tendency can forecast short-term changes in the weather. However, in an , the cathode is the wire or plate having excess negative charge, so named because positively charged tend to move towards it.

Next

Fluids in Physics: Definition and Characteristics

a-level physics definition

Okay, that was a mean trick, but while we're here, we might as well use this great location and learn a little bit about the different phases of matter. The atomic nucleus contains a mix of positively charged and electrically neutral. Term Photon Definition A particle which represents an electromagentic wave. And they are the ones that most students will lose marks in because they come in all styles and are unpredictable. In a , the anode is the negative terminal or pole which emits electrons toward the external part of an.

Next

Refraction

a-level physics definition

Any powered tool consisting of one or more parts that is constructed to achieve a particular goal. Files cannot be altered in any way. Any quantity that has both magnitude and direction. For rays entering medium 1 from medium 2, the refractive index is written mathematically as, D. If the internal angle is increased beyond a value, the ray no longer leaves the glass. The point in a body around which the resultant torque due to gravity forces vanish. The physics of complex, self-organizing systems.

Next

Definitions of Stress, Strain and Youngs Modulus

a-level physics definition

Compare the energy difference between a rock at the bottom of a cliff and the energy in moving it to the top of the cliff. This light ray bends when it moves to glass due to change in speed. Quarks combine to form composite particles called , the most stable of which are and , the components of atomic nuclei. For example, how gravitational potential energy of a pendulum is converted to kinetic energy, and thus the rise in velocity. Acceleration of free fall g The acceleration of a body falling under gravity 9. Buoyancy in a fluid comes from the pressure of the fluid itself. Lesson Summary Like the objects we find on a tropical beach, most things on Earth can be easily categorized into one of three phases of matter: solid, liquid or gas.


Next

H2 Physics Notes

a-level physics definition

The path that a moving object follows through as a function of. For example, different fluids will have different densities and viscosities, and liquids and gases respond differently to changes in temperature. Let's take a trip to the beach. First law of thermodynamics state that internal energy is a function of state and the increase in internal energy is equal to the sum of the heat supplied to system and work done on system. An energy difference exists between the top of the cliff and the bottom. In other words, you can more easily press gas particles together than you can the particles of a liquid.

Next