1) If Shagreen bought the energy star refrigerator for $1800 and saved $200 every year, how many years would it take for her to save back the
money she spent on the refrigerator?

If an atom contains 11 protons in its nucleus, predict the element with the atomic number and electronic configuration. will the number of electrons remain the same during the chemical reaction in such an atom? explain.

Match each type of lever with the correct diagram. 1. first-class 2. third-class 3. second-class

You want to move a heavy box with mass 30.0 kg across a carpeted floor. you pull hard on one of the edges of the box at an angle 30∘ above the horizontal with a force of magnitude 240 n, causing the box to move horizontally. the force of friction between the moving box and the floor has magnitude 41.5 n . what is the box's acceleration just after it begins to move