Ultrasound with a frequency of 4.077 mhz can be used to produce images of the human body. if the speed of sound in the body is the same (2.31 km/s) as in salt water, what is the wavelength in the body? answer in units of m. 01

Assuming weightless pulleys and 100% efficiency, what is the minimum input force required to lift a 120 n weight using a single fixed pulley?

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.

Which component of the earth’s atmosphere is decreased due to photosynthesis?