Jim rode at average speed of 12 mph for 2 hours then he walked at average speed of 3 mph for 0.5 hours what was the total distance covered by jim

Which equation is used to calculate the magnetic force on a charge moving in a magnetic field

Select the situation bellow that would produce a total displacement of zero. a. a trip to the moon and then to mars b. a horse galloping from one end of a field to another c. the criss-crossing path of a bug as it flies from flower to flower d.a round-trip ride to school and back

The concept of keystone species is controversial among ecologists because most organisms are highly interdependent. if each of the trophic levels is dependant on all others how can we say one is most important