Which of these are associated with the solar wind? Check all that apply.
produces tides
disrupts communication systems
composed of charged particles
travels at about 400 km/s
explains changes in the weather

The image shows ekgs of a person with normal heart waves and of a person having tachycardia. based on this image, what kind of condition is tachycardia? a. the heart beats abnormally fast. b. the heart beats abnormally slow. c. the right atrium of the heart stops working. d. the left ventricle pumps less blood to the aorta.

How does pregnancy begin? a) a placenta forms in the uterus b) a sperm reaches an egg in the fallopian tubec) the blastocyst differentiates into two cell types d) contractions begin in the uterine wallapex

Suggest why placing wheels under a heavy box reduces the neccessary force required to push it along at a constant speed.