Solve this please. Note: End X is on left side, and End Y is on the right side.

Figure 5.1 shows the arrangement of atoms in a solid block.

a. (i) End X of the block is heated. Energy is conducted to the end Y, which becomes warm. [2]

(ii) Explain why the solid block expands when it is heated. [1]

b. The block is heated and becomes a liquid.

Describe the changes that occur to the arrangement and the motion of the atoms. [2]

I'm really sorry that you can't see the questions properly on the picture.

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.