A thermometer is taken from an inside room to the outside, where the air temperature is 30° F. After 1 minute the thermometer reads 80° F, and after 5 minutes it reads 55° F. What is the initial temperature of the inside room? (Round your answer to two decimal places.)

Ajet plane has a sound level of 120 db at a distance of 60 m. what is the q23. sound level at a distance of 6.0 km? (60)2 (6000)? om solution 80db db, hint: 16x assume ultrasound waves travel through the body of an animal at 1540 q24. m/s. if a 30,000 hz signal were reflected off a portion of a heart which was moving toward the source at 3 m/s, what frequency signal would return to the stationary source? solution 30.117hz

An object resting on a table weighs 100 n. with what force is the object pushing on the table? with what force is the table pushing on the object? explain how you got your answer.

What are the north and south poles of a solenoid change with?