What is the relationship between hydrogen bonds and polar attractions? a hydrogen bond is a polar covalent bond between hydrogen and another atom. b. polar attractions are a type of hydrogen bonding. c. hydrogen bonds are a type of polar attraction. d. a polar bond is a hydrogen bond between atoms other than hydrogen.

Option A, A hydrogen bond is a polar covalent bond between hydrogen and another atom.

Explanation:

Hydrogen bond is formed between a hydrogen atom and any other electronegative atom such as Nitrogen, fluorine, iodine, chlorine, oxygen etc.

Hydrogen bonds are weak bonds that are formed due to the attraction between the two opposite poles i.e positive and negative poles. These are weak inter-molecular forces that can be easily broken off.

Thus, the correct option is A

when the displaced particles are perpendicular to the direction the wave travels, is called a transverse wave, whereas in longitudinal wave the displace practices are parallel to the direction of the wave.

in the given image:

first image shows - longitudinal wave

second image shows - transverse wave

third image shows - longitudinal wave

fourth image shows - longitudinal wave

before, trains worked using the steam engine. thus, it uses heat so it is crucial to apply heat balance. the steam engine absorbs energy during the stage of boiling water. so, this is the endothermic reaction. when the steam is used to work the piston, it has to release this energy through running the train. the excess energy is released as an exhaust to the chimney. this is the exothermic process because it releases energy to the surroundings.