A car travels in a straight line for 2.8 h at a constant speed of 63 km/h.
What is its acceleration?
Answer in units of m/s2.

Gam radio signals can usually be heard behind a hill, but fm often cannot. that is, am signals bend more than fm. explain. (radio signals, as we shall see, are carried by electromagnetic waves whose wavelength for am is typically 200 to 600 m and for fm about 3 m.)

Janelle made a hypothesis bout the uneven temperatures inside her house during winter. she believes that 50% of the ducts are blocked and she plans to investigate. if she wants to prove her hypothesis using scientific processes what should she do next?

Explain what it means to view something from a frame of reference. provide an example that illustrates your explanation. (4 points)