run around a circular track, with radius 25m, for 4 times and 1/4 times before stopping. it takes me 16 minutes

Your science teacher brings in a speaker to talk to your class about climate change. during the session, students ask a few questions. which questions are related to the current evidence on climate change

Jenny wants to test the electrical conductivity of two substances dissolved in water. she is preparing the containers for the experiment. which factor is most important for her to control? a) volumes of the solutions b) appearance of the solutions c) temperatures of the solutions d) concentrations of the solutions

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