Ascale should be used when taking photographs so that (multiple answer) the date and time of the photograph is known the size of the photograph can be determined the spatial relationship between various objects can be determined the image can be scaled so that an investigator knows the size of an object the direction that the camera was facing when the picture was taken can be determined

An air bubble of volume 20 cm³ is at the bottom of a lake 40 m deep, where the temperature is 4.0°c. the bubble rises to the surface, which is at a temperature of 20°c. take the temperature of the bubble’s air to be the same as that of the surrounding water. just as the bubble reaches the surface, what is its volume?

What is the fate of the electrons that interact with a specimen in an electron microscope?

Assume that a person skiing high in the mountains at an altitude of h = 15100 ft takes in the same volume of air with each breath as she does while walking at sea level. determine the ratio of the mass of oxygen inhaled for each breath at this high altitude compared to that at sea level. assume that the air composition (i. e. % of air that is oxygen) is the same at sea level as it is at 15100 ft.