Please provide step by step solutions so I can understand them better. Thank you.

34 The of 4 rSl sound had an intensity of 1.63 X 10'8 watt per square meter. and the second sound had an Inlc'nsil} J ~18 x lo watt per square meter. By how many decibels was the second sound greater than the rst sound? The lengtn 01' a half-wavelength dipole antenna is 3.4 meters. For what fundamental frequent) was this antenna designed? In the following diagram. let's use a gear with 30 evenly spaced teeth and a distance D of l1.5 kilometers. The speed of rotation is adjusted so that an outgoing pulse is blocked by the next tooth when it comes back. We estimate lhc angular speed of the gear to be 180 revolutions per second. What speed of light do we get? Light source Toothed Mirror Water is hard to compress as its bulk modulus is 2.0 x to" pascals. If a volume of water is subjected to a pressure increase of 150 pascals and its initial volume is 480 cubic meters, (a) What will be the fractional decrease in the volume? (b) What would be the change in volume? Terri holds a flashlight Whose rays travel at 3.00 X IOS m/s. Michael's truck is traveling in the same direction at 2.18 x IOS m/s. When he looks at the rays from Terri's ashlight. how fast does he think the rays are moving? 2.18 x106 m-s'1 In the reference frame of observer/l. the 4.60-kg mass is sliding in the positive x direction at 3.00 m/s. Observer B is moving toward observerA with a relative velocity of 7.00 m/s. (3) What kinetic energy docs observerA calculate for the mass? (b) What kinetic energy does observer 8 calculate for the mass? (c) Which observer is correct