How is motion described in physics?
• Motion is described relative to a chosen coordinate system. • Vector quantities can be combined to find resultant vectors or divided into their component parts • Displacement-time, velocity-time, and accel-time graphs are connected in the representation of physical motion. • When an object is at constant velocity, displacement-time is linear.
thermal physics notes ib
What is the relationship between temperature and thermal energy?
The temperature of an object is a measure of how hot it is. In other words, if two objects are placed in thermal contact, then the temperature difference between the two objects will determine the direction of the natural transfer of thermal energy.
How do you calculate thermal capacity of an object?
The thermal capacity of an object is given by Q=cθ (or Q=cΔT) and is defined by the amount of heat needed to raise an object’s temperature by 1K. During a phase change, temperature and kinetic energy remain constant and potential energy changes (which increases as molecules spread out and vice versa).
What is the SI unit of thermal capacity?
It is the amount of heat required to raise the temperature of substance through 1ºC or 1K. Thermal capacity = mass × specific heatThis is the relation between sp. heat capacity and heat capacity. Its SI unit is JK–1 CGS unit cal/°C. Its dimensions are.
ib physics notes pdf
How many measurements should you take in the IB Physics Laboratory?
In the IB Physics laboratory, you should take 3 to 5 measurements of everything. Five is always best if you can manage it. The length of a rod is measured using part of a metre rule that is graduated in millimetres, as shown below. Which oneof the following is the measurement, with its uncertainty, of the length of the rod?
What is an IB Physics SL content guide?
These content guides serve as study guides to complete as the year progresses. By the end of the year, they create a pretty complete picture of the IB Physics SL curriculum. For more details about these content guides, visit the IB Physics Content Guide page
ib physics notes waves
What is a wave in physics?
Definition: “A wave is a disturbance that travels in a medium (e.g. air, water etc.)” Source: A wave is initiated by a vibrating object and travels away from it. Particles of the medium: vibrate about their rest position at the same frequency as the source. A wave transfers energy and momentum, but never mass.
How do you find the frequency of a wave in physics?
where f’ is the observed frequency of the wave emitted by the source and received by the observer, f is the original frequency of the wave, v is the velocity of the wave, and v0 is the velocity of the observer. Frequency observed changes according to the equation v=fλ.
ib physics notes ideal gas
What determines the pressure in an ideal gas?
The molecules in a gas move around randomly at high speeds, colliding with surfaces and exerting pressure upon them Since this equates to a greater force per unit area, pressure in an ideal gas is therefore defined by: The frequency of collisions of the gas molecules per unit area of a container
What are the assumptions of the ideal gas theory?
The ideal gas is based on a list of assumptions stated previously. However, in real gases, such assumptions may not be true. Forces exist between gas molecules in real gases (intermolecular forces). The volume of molecules is not negligible compared to the volume of gas in real gases.