1. a small bathroom has two very hard walls on opposite sides of the room at a distance of 2.55m. these walls reflect sound so that sound waves have nodes at the walls. for which approximate frequency can a standing wave occur between the walls (resonance).
2. a container holding 1 liter is filled with air of room temperature (20 degrees Celsius) and normal atmospheric pressure. it is compressed to half volume and cooled to -53 celsius, what is the pressure in the air.
4. an electron is accelerated from the rest of a static electric field by a potential difference of 0.51 MV. what speed do the electrons get?
5. a point particle moves in space so that its position vector is given by: ((x (t), y (t), z (t)) = (f (t / x), g (2t / x), h ( 3t / x)) where f, g and h are three periodic functions with period 1 and x is a constant, what is the average of a velocity vector from time t to t + x.
2.
Now, substituting the values,
4.
Now, applying the conservation of energy,
5.
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