Aphoton with energy 662 kev collides with an electron in a metal sample and is scattered causing the electron to recoil. the electron is assumed to be stationary before the collision. write down the relativistic equation of conservation of energy and the equations for the conservation of the horizontal and vertical components of momentum for this collision but do not solve these. (a) a gamma ray photon of wavelength 1.88 pm strikes a metal target and the wavelength of the scattered radiation is measured at an angle (b) 0 90° to the incident beam. calculate: i) the wavelength of the scattered radiation, ii) the kinetic energy of the recoiling electron, ii) the fraction of the energy of the incident photon lost in the collision with the electron, and (iv) the angle made by the trajectory of the recoiling electron with the incident beam. write down an expression for the photon's fractional loss in energy k/e in the type of collision considered in (b) and hence demonstrate with a numerical estimate that the fractional energy loss for visible light is orders of magnitude less than for gamma-ray photons. (n. b., k is kinetic energy, e is total energy)

Consider two metallic rods mounted on insulated supports. one is neutral, the other positively charged. you bring the two rods close to each, but without contact, and briefly ground the the neutral rod by touching it with your hand. show answer correct answer what would be resulting charge (if any) on the initially neutral rod

In a thunderstorm, charge builds up on the water droplets or ice crystals in a cloud. thus, the charge can be considered to be distributed uniformly throughout the cloud. for the purposes of this problem, take the cloud to be a sphere of diameter 1.00 kilometer. the point of this problem is to estimate the maximum amount of charge that this cloud can contain, assuming that the charge builds up until the electric field at the surface of the cloud reaches the value at which the surrounding air breaks down. this breakdown means that the air becomes highly ionized, enabling it to conduct the charge from the cloud to the ground or another nearby cloud. the ionized air will then emit light due to the recombination of the electrons and atoms to form excited molecules that radiate light. in addition, the large current will heat up the air, resulting in its rapid expansion. these two phenomena account for the appearance of lightning and the sound of thunder. take the breakdown electric field of air to be eb=3.00ă—106n/c. part a estimate the total charge q on the cloud when the breakdown of the surrounding air is reached. express your answer numerically, to three significant figures, using ďµ0=8.85ă—10â’12c2/(nâ‹…m2) .

When is a current produced? when the terminals of an electrochemical cell are connected by a wire if the electric circuit is opened in an electrochemical cell if the electrolyte is removed from an electrochemical cell when the electrodes are reversed in an electrochemical cell