Un radar trasmette un segnale radio (velocità di propagazione del segnale = 300 000 km/s) che incide su un oggetto e viene riflesso. Il segnale di ritorno arriva al radar dopo un millesimo di secondo dall'istante in cui è partito. A quale distanza si trova l'oggetto?

A1200 kg car traveling north at 10 m/s is rear-ended by a 2000 kg truck traveling at 30 m/s. what is the total momentum before and after the collision?

Wavelength,frequency,and energy are related.what happens to a wave as it’s wavelength gets shorter?

An object with initial temperature 130 ∘ f is submerged in large tank of water whose temperature is 50 ∘ f . find a formula for f ( t ) , the temperature of the object after t minutes, if the cooling constant is k = − 0.2 . remember newton's law of cooling (the rate of change of temperature with respect to time is equal to k times the difference between the temperature of the object and the surrounding temperature) ! : )