1. a worker pushes a large rock to the north while another worker by pushing it to the east. if they both exert equal force, in what direction does the rock move? a. north b. northeast c. southwest d. east 2. at take off, a plane flies 100 km north before turning to fly 200 km east. how far is its destination from where the plane took off? a. 200 km b. 224 km c. 300 km d. 173 km 3. a runner traveled 15 kilometers north then backtracked 11 kilometers south before stopping. his resultant displacement was a. 26 km south b. 4 kilometers south c. 26 km north d. 4 kilometers north

Which sentences describe disadvantages of burning fossil fuels instead of using hydrogen fuel cells? burning fossil fuels contributes to climate change. burning fossil fuels takes place inside expensive fuel cells. fossil fuels aren't widely available, but pure hydrogen is. fossil fuels are nonrenewable.

Imagine you work as a consultant, and your daily job involves listening to the constructive criticism of others. as part of your job, you must listen to opposing viewpoints to make important decisions. in this activity, you are a consulting dam engineer. you must make a decision about four different dams; should they be repaired, taken down, or left alone? you will listen to contrasting opinions about what should be done with the dams before you make the final decision. as the consulting dam engineer, what do you decide to do with this dam? explain your reasoning. by making your decision, did you support the opinions of the mayor and/or the dam safety official? why or why not? (site 1)

Power can be defined as a. the distance over which work was done. b. how much work can be done in a given time. c. all the work in an given area. d. the energy required to do work.