Answer:
Lightning is an electric current. Within a thundercloud way up in the sky, many small bits of ice (frozen raindrops) bump into each other as they move around in the air. All of those collisions create an electric charge. After a while, the whole cloud fills up with electrical charges.
I think nephrons......................................................
Answer:
Newton's universal law of gravitation says that the force acting upon (and therefore the acceleration of) an object toward Earth should be inversely proportional to the square of its distance from the center of Earth. It's this force of gravity on the surface of Earth that gives us our sense of weight.
Hope that helps
Forearm. Radial artery runs along the forearm and winds at the wrist. Due to the position of the artery (close to the surface of the arm and distally located to the radius bone), it is used to check for cardiac rhythm and heart rate. You have often observed medics place two finger on your wrist to feel for pulse.
Blood can also be drawn from the artery to perform tests such as arterial blood gas.
