A simple Potter's Wheel is 50 cm in diameter. When it turns once, a point on its rim moves a little more than 150 cm. A pot 20 cm in diameter is
centered on the Wheel. When the Wheel turns once, so does the pot. As
the pot turns once, a point on its rim moves a little more than 60 cm.
Explain how the mechanical advantage of the wheel and axle make it
easier to shape the pot.

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.

Question part points submissions used suppose that 2 j of work is needed to stretch a spring from its natural length of 26 cm to a length of 36 cm. (a) how much work is needed to stretch the spring from 28 cm to 32 cm? (round your answer to two decimal places.)

Which component of the earth’s atmosphere is decreased due to photosynthesis?