Which of the following statements are correct? check all that apply. __the work done by the gas on the environment is the same in both processes. __the work done by the gas on the environment in process b is smaller than that in process a. __the final and the initial temperatures in process b can be different than in process a. __the work done by the gas on the environment in process b is greater than that in process a. __the temperature of the gas in process b is first increasing and then decreasing. __the final and the initial temperatures in process b are always the same as in process a. __the temperature of the gas in process b is constant. __the temperature of the gas in process b is first decreasing and then increasing.

Suppose that an electromagnetic wave which is linearly polarized along the x−axis is propagating in vacuum along the z−axis. the wave is incident on a conductor which is placed at z > 0 region of the space. the conductor has conductivity σ, magnetic permeability µ and electric permittivity ε. (a) find the characteristic time for the free charge density which dissipates at the conductor. (b) write the maxwell equations and derive the wave equation for a plane wave propagating in a conductor. (c) find the attenuation distance at which the incident amplitude reduces to e ^−1 of its initial value. (d) find the electric and magnetic fields inside the conductor. 8 (e) find the power loss per area of the incident electromagnetic wave at the surface of conductor.

The speed of sound in ice, water, and steam is shown. what best explains the speed of sound in different states of matter? sound travels fastest in ice because energy is easier to transfer when the molecules are close together. sound travels slowest in steam because the sound has to move around the gas molecules that are far apart. sound travels fastest in ice because the temperature of solids is always greater, so the heat transfers the sound energy. sound travels slowest in steam because the pressure is so great the sound cannot travel though the steam particles.

We put a force of 50n on an object and the acceleration is 100 m/s². what is the mass of the object?