1. The instrument at the right is 5 meters long and is vibrating as shown It vibrates up and down with 33 complete vibrational cycles in 10 seconds.

a) What type of instrument being used?
b) Which harmonic is shown in the diagram?
c) Determine the frequency, period, wavelength and speed for this
wave.
d) Determine the 3rd harmonic frequency?​

What is the relationship between the direction of motion of the balloon and the wind currents

Currents in dc transmission lines can be 100 a or higher. some people are concerned that the electromagnetic fields from such lines near their homes could pose health dangers. for a line that has current 150 a and a height of 8.0 m above the ground, what magnetic field does the line produce at ground level? express your answer in teslas and as a percentage of the earth’s magnetic field, which is 0.50 g. is this value cause for worry?

Mixing salt in water is an example of physical change