The pistol shrimp has one big claw that snaps shut with remarkable speed. The part of the claw that rotates moves through a 90° angle in a time interval of 1.5 ms. We assume that the claw is 1.75 cm long and that it undergoes a constant angular acceleration. Required:
a. What is the angular acceleration? Assume the claw starts from rest.
b. What is the final angular speed of the claw?
c. What is the tangential acceleration of the tip of the claw?
d. How fast is the tip of the claw moving at the end of its motion?

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.

Time remainin52: 42the chart shows data for a moving object.which conclusion is best supported by the information inthe chart? time (s)velocity (m/s

Two rigid transformations are used to map δhjk to δlmn. the first is a translation of vertex h to vertex l. what is the second transformation? a reflection across the line containing hk a rotation about point h a reflection across the line containing hj a rotation about point k