"The taller you are, the faster your heart rate." This hypothesis is testable, but not experimental.
Answer: True
Sometimes the use of condoms can't prevent STIs(sexually transmitted infections) because of the manufacturer fault. STIs that caused by lice is not protected too because the condom doesn't cover hair. Other than that, a condom provides a good physical barrier that prevents diseases that transmitted body liquid.
During exercise stroke volume increases because more blood is sent back to the heart due to the muscles squeezing blood in the veins
A reverse reaction is the chemical reaction moving both forward and backwards.
An example of this is Ammonium chloride ⇌ ammonia + hydrogen chloride
This is a symbol for reverse reaction ⇌
In the brain especially in the eyes