A Particle of Interplanetary Dust Is Close to the Sun

question 61

Multiple Choice

A particle of interplanetary dust is close to the Sun and interacts with the Sun's gravitational field as well as with the light emitted by the Sun. If it only interacts appreciably with the Sun, can it be pushed away from the Sun instead of being pulled towards it?

• A) No, the gravitational force will always dominate if the object is large enough.
• B) No, the gravitational force will always dominate if the object is close enough.
• C) Yes, if the object is small enough, radiation pressure will win over.
• D) Yes, but the object must be very large so that it can gain enough radiation pressure.
• E) None of the previous answers is correct.

---

Definitions:

Cryptorchidism

A condition in which one or both of a male's testicles fail to descend from the abdomen into the scrotum before birth.

Hyaluronidase

An enzyme that catalyzes the breakdown of hyaluronic acid, aiding in tissue permeability and the dispersion of injected substances.

Apgar Scoring System

A quick test performed on a newborn at 1 and 5 minutes after birth to assess the baby's heart rate, breathing, muscle tone, reflexes, and skin color.

Chlamydia

A sexually transmitted disease caused by a bacteria that lives as an intracellular parasite.