I am a Gas. I am found throughout the entire Universe. You may know me as one of the elements that makes up water. I am the most important of the 3 main building blocks of the Solar System & the Universe. I fuel stars like your Sun.

Aperson gives a shopping cart an initial push along a horizontal floor to get it moving, and then lets go. the cart travels forward along the floor, gradually slowing as it moves. consider the horizontal force(s) on the cart while it is moving forward and slowing. which of the following statements is correct? (a) both a forward and a backward force are acting on the cart, but the forward force is larger. (b) only a forward force is acting which diminishes with time. (c) both a forward and a backward force are acting on the cart, but the backward force is larger. (d) only a backward force is acting, no forward force.

Aplane flying horizontally at an altitude of 1 mile and a speed of of 500mih passes directly over a radar station. find the rate at which the distance from the plane to the station is increasing when it is 2mi away from the station.

An object is placed in front of a concave mirror between the pole and the focus of the mirror, what is the nature of the image formed by the mirror