Search results
Results from the WOW.Com Content Network
Depending on the gear ratio of the bicycle, a (torque, angular speed) input pair is converted to a (torque, angular speed) output pair. By using a larger rear gear, or by switching to a lower gear in multi-speed bicycles, angular speed of the road wheels is decreased while the torque is increased, product of which (i.e. power) does not change.
v. t. e. A force is an influence that can cause an object to change its velocity unless counterbalanced by other forces. The concept of force makes the everyday notion of pushing or pulling mathematically precise. Because the magnitude and direction of a force are both important, force is a vector quantity.
A tuning fork is a fork-shaped acoustic resonator used in many applications to produce a fixed tone. The main reason for using the fork shape is that, unlike many other types of resonators, it produces a very pure tone, with most of the vibrational energy at the fundamental frequency. The reason for this is that the frequency of the first ...
A vibration in a string is a wave. Resonance causes a vibrating string to produce a sound with constant frequency, i.e. constant pitch. If the length or tension of the string is correctly adjusted, the sound produced is a musical tone. Vibrating strings are the basis of string instruments such as guitars, cellos, and pianos.
A seismic waveis a mechanical waveof acoustic energythat travels through the Earthor another planetary body. It can result from an earthquake(or generally, a quake), volcanic eruption, magmamovement, a large landslideand a large man-made explosionthat produces low-frequency acoustic energy.
Acceleration is the rate of change of velocity. At any point on a trajectory, the magnitude of the acceleration is given by the rate of change of velocity in both magnitude and direction at that point. The true acceleration at time t is found in the limit as time interval Δt → 0 of Δv/Δt.
For any given note on the piano, the deviation between the normal pitch of that note and its equal-tempered pitch is given in cents (hundredths of a semitone). As the Railsback curve shows, octaves are normally stretched on a well-tuned piano. That is, the high notes are tuned higher, and the low notes tuned lower, than they are in a ...
Kundt's tube is an experimental acoustical apparatus invented in 1866 by German physicist August Kundt [1][2] for the measurement of the speed of sound in a gas or a solid rod. The experiment is still taught today due to its ability to demonstrate longitudinal waves in a gas (which can often be difficult to visualise).