2. The expression of a stationary wave is given by y = 0.3 cos 0.51x sin 607
Where y and x in meters and is in seconds.
i. Write the expression for two progressive waves resulting the stationary wave above.
ii. Determine the wavelength, frequency, amplitude, and velocity for both progressive waves.
[Ans: 4 m, 30 Hz, 0.15 m, 120 m s']

Two point charges are separated by a certain distance. how does the strength of the electric field produced by the first charge, at the position of the second charge, change if the second charge is doubled? a. the field does not change b. the field strength decreases by half. c. the field strength doubles d. the field strength quadruples

Air conditioners not only cool air, but dry it as well. suppose that a room in a home measures 5.0m×9.0m×2.4m . if the outdoor temperature is 30 ∘c and the vapor pressure of water in the air is 85 % of the vapor pressure of water at this temperature, what mass of water must be removed from the air each time the volume of air in the room is cycled through the air conditioner? the vapor pressure for water at 30 ∘c is 31.8 torr.

What are some important factors to consider when choosing a warm-up before your workout?