New theories usually don't start "from scratch. For example, the
modern model of the atom is the result of new information added to the
cloud model. What is the main difference between the cloud model of
the atom and the modern model?
A. Only the modern model includes protons.
B. The cloud model does not include neutrons.
C. Electrons move in specific orbits in the modern model.
D. Electrons exist in a cloud around the nucleus in the cloud model.

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.

I'm thinking it's 2 you are asked to explain the earth's magnetic field. which is the best reply? 1. the earth's magnetic south is similar to the north pole of a magnet. 2. the earth's core has a strong magnetic charge similar to the south pole of a magnet. 3. the earth's geomagnetic south is similar to the south pole of a magnet. 4. the earth's magnetic charge is not centered at either pole; it varies based on location.

If the moon rises at a given location at 6: 00 p. m. today, about what time will it rise tomorrow night?