Aman dressed in all black is walking down a country lane. suddenly, a large black car without any lights on comes round the corner and screeches to a halt. how did the car know he was there?

If it takes a planet 2.8 x 10^8 s to orbit a star with a mass of 6.2 x 10^30 kg what is the average distance between the planet and the star

Aboat radioed a distress call to a coast guard station. at the time of the call, a vector a from the station to the boat had a magnitude of 45.0 km and was directed 15.0° east of north. a vector from the station to the point where the boat was later found is = 30.0 km, 15.0° north of east. what are the components of the vector from the point where the distress call was made to point where the boat was found? in other words, what are the components of vector c = b - a?

Which compound is held together by the electrostatic force between two ions? a. co2 b. cci4 c. h2s d. mgf2