You are riding your bike to the mall. you travel the first mile in ten minutes. the last mile takes you 15 minutes. this is an example of: a. average velocity, b. positive acceleration, c. instantaneous speed, or d. negative acceleration

In a system, when potential energy decreases, then entropy also decreases. true false

The force needed to overcome static friction is usually less than that needed to overcome kinetic friction.true or false?

Certain bacteria (such as aquaspirillum magnetotacticum) tend to swim toward the earth’s geographic north pole because they contain tiny particles, called magnetosomes, that are sensitive to a magnetic field. if a transmission line carrying 100 a is laid underwater, at what range of distances would the magnetic field from this line be great enough to interfere with the migration of these bacteria? (assume that a field less than 5% of the earth’s field would have little effect on the bacteria. take the earth’s field to be 5.0 * 10-5 t, and ignore the effects of the seawater.)