The average speed of a person in driving to school is 30 km/h. on the return trip along with the same route ,the average speed is 25km/h. what is the average speed for the round trip to the school

Write down two additional questions about earth's magnetic field that will make your presentation more informative.

Acertain radio station broadcasts radio waves that have a wavelength of 298cm what is its broadcast frequency?

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.