Acar travels along a straight line at a constant speed of 56.0 mi/h for a distance d and then another distance d in the same direction at another constant speed. the average velocity for the entire trip is 33.5 mi/h. (a) what is the constant speed with which the car moved during the second distance d?
i started out with vxavg=(vxi+vxf)/2 and came out to 11 and it was wrong. if anyone has a good website i can use to learn physics it would be much appreciated.

Aray of light traveling parallel to the principal axis of a concave mirror will be reflected through the mirror's

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)

If the spring constant k of a pogo stick is 3500 n m and the weight of the person on the pogo stick is 700 n, how much is the spring in the botom of the pogo stick compressed?