Did the iPhone usher in the scientific revolution?
The scientific revolution took place in the 16th and 17th centuries. The iPhone came out in the 21st century.
The answer is no.

Does the Boy Who Cried Wolf hypothetically have reason to pray to Pan?
Pan is the ancient Greek god of the wild, shepherds and flocks. The Boy Who Cried Wolf, from Aesop's Fables, was a shepherd boy.
The answer is yes.

Does the JPEG acronym stand for a joint committee?
The term "JPEG" is an initialism/acronym for the Joint Photographic Experts Group. They created the standard in 1992. The Joint Photographic Experts Group (JPEG) is the joint committee between ISO/IEC JTC 1 and ITU-T Study Group 16 (formerly CCITT) . The Joint Photographic Experts Group created and maintains the JPEG, JPEG 2000, and JPEG XR standards.
The answer is yes.

Did the death of Helen Palmer have a significant effect on Dr. Seuss?
Dr. Seuss's real name was Theodor Geisel. Theodor Geisel was married to Helen Palmer at the time of her suicide. Theodor Geisel is quoted having said he considered suicide after the death of his wife.
The answer is yes.