1. a girl uses a skateboard to travel 65 meters in 25 seconds. what is her average speed?

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

According to the image below, which season is about to begin in the southern hemisphere? a. summer b. autumn c. winter d. spring

The ima of the following pulley system is