The value of acceleration due to gravity is 9.8 m/s 2Īn interesting fact about acceleration due to gravity: This is due to the gravitational force of Earth. Acceleration due to gravity: This is the acceleration that every freely falling body acquires on the Earth and is denoted by ‘g’.Instantaneous acceleration: This is the acceleration experienced by the body at that given instant of time or over an infinitesimally small time interval.Linear acceleration: This is the acceleration when a body is moving in a straight path without changing its direction.Here the concept of circular velocity needs to be accounted while calculating centripetal acceleration. Centripetal acceleration: This is the acceleration a body experiences when it is moving in a circular motion.It is often termed as deceleration, though the appropriate term according to scientists is negative acceleration. Negative acceleration: A body experiences negative acceleration when the final velocity of the body is less than the initial velocity.Positive acceleration: A body experiences positive acceleration when the final velocity of the body is more than the initial velocity.Mass: The quantity of matter in a body its inertia or resistance to acceleration. Assuming that the displacement vector is ‘s’ and velocity vector is ‘v, the acceleration a can be calculated as: If you differentiate the velocity vector with respect to time, you will obtain acceleration. The relation between the force F acting on a body of mass ‘m’ and the resultant acceleration ‘a’ produced in it is given by F = m x a. This equation implies that the unit of acceleration is (m/s)/s = m/s2Īccording to Newton’s law, a body experiences acceleration based on the force acting on it. To calculate acceleration in this method, you need to know the change in velocities in a given time interval.Īssuming that Vi and Vf are the initial and final velocities of a body during a certain time ‘t1’ and ‘t2’ seconds, then the acceleration ‘a’ of the body for that time interval is given by (Vf- Vi)/(t1- t2). *I thank Stephen Selipsky for bringing Page's results to my attention and for his patient explanations.You can calculate acceleration in the following ways: As the universe expands and cools, however, eventually the black hole may begin to lose mass-energy through Hawking radiation. Indeed, any black hole with a mass greater than about 0.75% of the Earth's mass is colder than the cosmic background, and thus its mass increases for now. So rather than shrinking, it would continue to grow. Therefore, whatever little energy it radiates, it actually receives more in the form of heat from the cosmos. But that does not take into account the fact that such a black hole is colder than the cosmic microwave background radiation bathing it. The lifetime of a $1~M_\odot$ black hole, therefore, is calculated as nearly 57 orders of magnitude longer than the present age of the universe. The latest version also correctly accounts for the black hole's effective area, light scattering, and the resulting change in its evaporation lifetime. The drop-down menus select the units of measure to be used for their corresponding input field.Īn added feature is the calculation of the "peak photon" wavelength, corresponding frequency, and photon energy, representing the peak of the blackbody radiation curve per unit logarithm (of wavelength or frequency) that corresponds to the black hole temperature. I kept the unit, but decided to use instead the much more useful value of one solar mass as the initial mass.Īs in Wisniewski's version, specifying any quantity causes the others to be recalculated accordingly (see source).
#Physics calculator period code#
Wisniewski's original code included a fictitious unit of mass, the "standard industrial neuble", equivalent to a billion metric tons, from Will McCarthy's novel The Collapsium. The original idea belongs to Jim Wisniewski, whose page from 2006 ( link) appears to be no longer available available again, but since it is not archived by the Wayback Machine, I think my functional clone is still useful. This page contains a JavaScript calculator of Hawking radiation and other parameters of a Schwarzschild black hole.