13.437. preparative chemistry: spectroscopic and structural
... where = viscosity and V = molecular volume. There are three main terms which need to be minimised in order to obtain reasonable linewidths in quadrupolar nuclei, namely: the linewidth factor, the electric field gradient and the correlation time. The linewidth factor is dependent only on the intrin ...
... where = viscosity and V = molecular volume. There are three main terms which need to be minimised in order to obtain reasonable linewidths in quadrupolar nuclei, namely: the linewidth factor, the electric field gradient and the correlation time. The linewidth factor is dependent only on the intrin ...
Superresolution optical magnetic imaging and
... effect on the total sequence time (few hundred microseconds). Moreover by adjusting τ doughnut , sub-diffraction NV images can be attained with doughnut powers as low as 25 µW, ultimately limited by the relaxation time T1 ~1 ms. Importantly, owing to the long lifetimes of the states harnessed for NV ...
... effect on the total sequence time (few hundred microseconds). Moreover by adjusting τ doughnut , sub-diffraction NV images can be attained with doughnut powers as low as 25 µW, ultimately limited by the relaxation time T1 ~1 ms. Importantly, owing to the long lifetimes of the states harnessed for NV ...
Pulse shaping control of spatially aligned
... structures of N2 and O2 has been achieved. In this report, we will concentrate on the influence of third order dispersion (TOD) on the (half-) revival structure, where molecules switch from a situation of alignment to antialignment. We can show, both in simulations and experimentally, that it is pos ...
... structures of N2 and O2 has been achieved. In this report, we will concentrate on the influence of third order dispersion (TOD) on the (half-) revival structure, where molecules switch from a situation of alignment to antialignment. We can show, both in simulations and experimentally, that it is pos ...
Fundamentals
of
Physics
in
Engineering
I
PROBLEMES
PROPOSED
... that contains one mole of an ideal gas in a room at STP? 4.-A mixture of air and vaporized gasoline is compressed inside the cylinders of an automobile engine before being ignited. We know that a typical engine has a compression ratio of 9 to 1, which means that the gas in the engine cylinder is com ...
... that contains one mole of an ideal gas in a room at STP? 4.-A mixture of air and vaporized gasoline is compressed inside the cylinders of an automobile engine before being ignited. We know that a typical engine has a compression ratio of 9 to 1, which means that the gas in the engine cylinder is com ...
Unit-2-Electricity-and-Thermal-Physics
... parallel: components connected across each other such that they each have the same potential difference and the current has a choice of routes drift velocity: the average velocity of the charge carriers through a circuit charge carrier density: the number of charged particles per metre cubed that ar ...
... parallel: components connected across each other such that they each have the same potential difference and the current has a choice of routes drift velocity: the average velocity of the charge carriers through a circuit charge carrier density: the number of charged particles per metre cubed that ar ...
the limits of the beam sag under influence of static magnetic and
... the elastic beam was buckled prior to energising the field. The physically plausible course is the lowest curve, starting at zero and reaching for qN = 1 the value of β = 1/3. For the value qN = 1 two different solutions do exist : β = 1/3 and β = 4/3. This can by interpreted as the limit of stability ...
... the elastic beam was buckled prior to energising the field. The physically plausible course is the lowest curve, starting at zero and reaching for qN = 1 the value of β = 1/3. For the value qN = 1 two different solutions do exist : β = 1/3 and β = 4/3. This can by interpreted as the limit of stability ...
The solar wind
... If the particle moves to a place where B increases, it is forced to increase its V decresing its V// in order to keep its Kinetic energy K=1/2 m (V2+ V//2) constant. The particle will reach a point where all of its energy will be due to V and at that point it will reverse its motion. ...
... If the particle moves to a place where B increases, it is forced to increase its V decresing its V// in order to keep its Kinetic energy K=1/2 m (V2+ V//2) constant. The particle will reach a point where all of its energy will be due to V and at that point it will reverse its motion. ...
Chapter 26 - KFUPM Faculty List
... T-012: HWQ#1: A copper wire "1" has a length L1 and diameter d1. Another copper wire "2" has a length L2 and diameter d2. At constant temperature, the second conductor has smaller resistance if: (Ans: d2 > d1 and L2 < L1.) Q#2: If 4.7*10**(16) electrons pass a particular point in a wire every minu ...
... T-012: HWQ#1: A copper wire "1" has a length L1 and diameter d1. Another copper wire "2" has a length L2 and diameter d2. At constant temperature, the second conductor has smaller resistance if: (Ans: d2 > d1 and L2 < L1.) Q#2: If 4.7*10**(16) electrons pass a particular point in a wire every minu ...
field lines - UET Taxila
... repulsive force pushes them as far apart as they can go. They thus migrate to the surface. ...
... repulsive force pushes them as far apart as they can go. They thus migrate to the surface. ...
Superconductivity
Superconductivity is a phenomenon of exactly zero electrical resistance and expulsion of magnetic fields occurring in certain materials when cooled below a characteristic critical temperature. It was discovered by Dutch physicist Heike Kamerlingh Onnes on April 8, 1911 in Leiden. Like ferromagnetism and atomic spectral lines, superconductivity is a quantum mechanical phenomenon. It is characterized by the Meissner effect, the complete ejection of magnetic field lines from the interior of the superconductor as it transitions into the superconducting state. The occurrence of the Meissner effect indicates that superconductivity cannot be understood simply as the idealization of perfect conductivity in classical physics.The electrical resistivity of a metallic conductor decreases gradually as temperature is lowered. In ordinary conductors, such as copper or silver, this decrease is limited by impurities and other defects. Even near absolute zero, a real sample of a normal conductor shows some resistance. In a superconductor, the resistance drops abruptly to zero when the material is cooled below its critical temperature. An electric current flowing through a loop of superconducting wire can persist indefinitely with no power source.In 1986, it was discovered that some cuprate-perovskite ceramic materials have a critical temperature above 90 K (−183 °C). Such a high transition temperature is theoretically impossible for a conventional superconductor, leading the materials to be termed high-temperature superconductors. Liquid nitrogen boils at 77 K, and superconduction at higher temperatures than this facilitates many experiments and applications that are less practical at lower temperatures.