13. An object of mass 30 kg is falling in air and experiences a force due to air resistance of 50N. a. Determine the net force acting on the object and
b. calculate the acceleration of the object.
Answer to (a)
Answer to (b)

Which of the following is true of natural population a.) populations are all the individuals of a species living in a defined area b.) populations are all uniform in size c.) viable populations exhibit little, if any, genetic variation

What is a cordon and where is it found

The table shows dates and appearance of index fossils. which rock layers can be dated most precisely? a) a layer containing both a fossil 4 and a fossil 3 b) a layer containing both a fossil 2 and a fossil 3 c) a layer containing both a fossil 1 and a fossil 4 d) a layer containing both a fossil 1 and a fossil 2