Will give brainliest
which of the following is true? a: water is important to some organisms. b: some substances must be dissolved in water before they can be used. c: all organisms obtain water through food. d: plant cells are unaffected when water is scarce.

The focal length of a relaxed human eye is approximately 1.7 cm. when we focus our eyes on a close up object, we can change the refractive power of the eye by about 16 diopters. (a) does the refractive power of our eyes increase or decrease by 16 diopters when we focus closely? explain. (b) calculate the focal length of the eye when we focus closely.

Which notation is used to represent an alpha particle? a. b. c. d.

In a good thermo flask the main cause of heat loss is