How are spiral, elliptical and irregular galaxies different from each other2) What is the size and shape of the milky way galaxy? And where is the sun located in the milky way galaxy?3) Why are sunspots darker than the surrounding surface areas of the sun?4) How are terrestrial planets different from Jovian planets?5) Compare and contrast the temperature, presence of water, composition of the atmosphere of the different planets.

Iwill give 30 points to whoever answers ! what is the formula for actual mechanical advantage and ideal mechanical advantage?

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.

How to tell if two objects are in thermal equilibrium 1.the objects have the same temperature 2.the objects are the same size 3.the objects are touching each other 4.the objects temperatures are changing