A photographer uses his camera, whose lens has a 50 mm focal length, to focus on an object 3.5 m away. He then wants to take a picture of an object that is 30 cm away. In which direction must the lens move to focus on this second object? How far must the lens move to focus on this second object?

Aplane flying horizontally at an altitude of 1 mile and a speed of of 500mih passes directly over a radar station. find the rate at which the distance from the plane to the station is increasing when it is 2mi away from the station.

Daughter element the new element produced along with a decay particle in a nuclear transmutation 2. half-life the substance that decays in a nuclear transmutation 3. parent element the change of one chemical element into another by nuclear decay or radioactive bombardment 4. transmutation the time required for the decay of one-half of the atoms in a sample of radioactive material

What happens when the vapor pressure of a liquid is equal to the external pressure?