The earth's orbit around the sun is very nearly circular, with an average radius of 1.5 x 1011 m. Assume the mass of the earth is 6 x 1024 kg and the mass of the sun is 1.99×1030kg. Determine the average speed of the earth in its orbit around the sun.

Greg drew a diagram to compare two of the fundamental forces. which labels belong in the areas marked x, y and z? gravitational force electromagnetic force x. attractive y repulsive z: infinite range x: infinite range y attractive z. repulsive x. always attractive y: infinite range z: attractive or repulsive x. attractive or repulsive y infinite range z: always attractive

It is advised not to hold the thermometer by the bulb while reading it

Which temperature scale measures water boiling at 100 degrees? which temperature scale measures water boiling at 100 degrees?