An arrow of mass 0.5kg so it has 25J of kinetic energy; find the speed of the arrow v = m/s​

Work out sian speed for the first 30 minutes of her journey. give your answer in km/h.

What conclusion can be made based on the temperature of soil when the light hits the soil at 0°, 45°, and 90° angles in section 2 of the experiment? did your results support your hypothesis? why or why not?

Iron is a transition metal with multiple oxidation numbers. (answer the following) a. what is the iron (ii) ion? how does it differ from the iron (iii) ion? b. if iron were to bond with oxygen, predict the formula for each oxidation number of iron. c. how would each formula be named?