Which is an example of a physical change? 1) gasoline ignites 2) water evaporates 3) a nial rusts 4) wood rots

An object is located 30.0 cm from a concave mirror. the focal length is 15.0 c,. what is the image distance? a. 30.0 cm b. -10 cm c. 10.0 cm d. -30.0 cm

What makes thermal imaging cameras useful? they can detect differences in color. they can detect differences in wave speeds. they can detect differences in temperature. they can detect mechanical waves.

How many neutrons does element x if it’s atomic number is 28 and its mass number is 87