Air is not a very good conductor of electricity but before a lightning strike, it becomes a better conductor. How does it do this and what is the air called?

What must exist for electric charges to flow? electric potential or electric potential difference

How would "you" define critical thinking?

If x=a+bt+ct 2 where x is in metres and t is in seconds. What is the dimensional unit of c?

A ball is launched with an initial velocity of 28.5 m/s at a 45° angle from the top of a cliff that is 10.0 m above the water below. Use g = 9.80 m/s2 to simplify the calculations.

Who was the first person to prove the curvature of the earth?

What is the critical angle θcrit for light propagating from a material with index of refraction of 1.50 to a material with index of refraction of 1.00? express your answer in radians?

Which of these could NOT be used to find the mechanical advantage of an inclined plane? A. input force B. output force C. percent efficiency D. length and height of inclined plane

What are the Rules of magnetism

Two spheres of the same radius, but of different masses, are both fully submerged in water. The lighter sphere is held below the water line by a rope anchored to the bottom of the container. The heavier sphere is suspended from a rope.

How does an increase in thermal energy affect molecules?