hi! does anybody know how the first, second and third laws of thermodynamics were created, or discovered?
Thanks :D-Well, I do know something about it. Ill share my knowledge! hahaha.
The first law
Will new mathematics have to be invented by someone for string theory to be solved without using the perturbation theory?
Do you think humans will do it, or artificial intelligence in the future will
When elephants walk, they keep two feet on the ground at the same time. Assume an elephant weights 3600 kg, and it has circular footprint with radius of 8cm. How much pressure will it exert when it wa
The kinetic energy of a particle is equal to the energy of a photon. The particle moves at 4.3% of the speed of light. Find the ratio of the photon wavelength to the de Broglie wavelength of the parti
A sample of 2.3*1010 atoms that decay by alpha emission has a half-life of 150
min. How many alpha particles are emitted between t=30 min and t=160 min?
The mass of a radioactive substance reduces to
This site: http://www.intuitor.com/physics_test/exp… claims that it is not the force of gravity, but the force of surfaces (like the floor or sofa) pushing on my body that gives me a sensation of weig
Why are numbers 10, and 26 dimensions singled out in string theory?-The simple answer is this: because thats what it takes to get answers that are not silly. [See source.]
Heres one example.M theory.
The Navy operated a man-rated centrifuge in Warminster, PA. It was used for testing with the Mercury astronauts and the X15 project. The gondola pictured above, which holds the person, is on the end o
A father racing his son has half the kinetic energy of the son, who has two-fifths the mass of the father. The father speeds up by 2.5 m/s and then has the same kinetic energy as the son.
(a) What is
What will be better to take to the moon, a spring clock or a pendulum clock? I also dont seem to understand what it would be better for exactly, keeping up with the same time as in earth?
Simple Harm
A 1300-turn coil of wire that is 2.20 cm in diameter is in a magnetic field that drops from 0.130 T to 0 T in 11.0 ms. The axis of the coil is parallel to the field.
What is the emf of the coil? (V)-
Four 1.50-V AA batteries in series are used to power a transistor radio. If the batteries can move a charge of 240 C, how long will they last if the radio has a resistance of 200 ohms?-I came up with
The potential at the surface of a 19 cm-radius sphere is 5.0 kV. What is the charge on the sphere, assuming its distributed in a spherically symmetric way? (Answer to two significant figures)
So far,
A roller coaster car of mass 960 kg starts at a distance of H = 20
thank you, i would really apreciate a clear explenation...-Energy at the top of the loop = m . g . ( 20 – 12 )= 960 . 9.8 . 8 = 7526
A car is parked 20.0 m directly south of a railroad crossing. A train is approaching the crossing from the west, headed directly east at a speed of 58.5 m/s. The train sounds a short blast of its 274-
