1. the oscillation frequency of the swing is 0.40hz. explain the physical meaning of this number 2. a flying insect in 60s wings sums up 3,000 together. what is the period of fluctuation of the insect wings

3. which variables describing the fluctuations (amplitude, period, frequency) do not change when the fluctuations are free, i. y. inhibitors

4. calculate 0.17m long mathematical pendulums with oscillation frequency

5.

What are similarities and differences of reflection, refraction, diffraction and absorption?

Avertical clean glass piezometer tube has an inside diameter of d = 1 mm and is used to measure pressure in a horizontal pipe carrying water as shown. due to pressure in the pipe, the water at 20c rises into the tube to a height h. if the water pressure in the pipe is p = 500 pa gauge, estimate the height h: (a) without considering surface tension (b) with surface tension (capillary) effects. the contact angle  can be assumed at 30 deg

Give me a example of a decomposer. explain what would happen if decomposers were absent from a forest ecosystem