(15 pts) o move in a spiral orbit given by the equation r aθ2 a particle of mass m is observed t where a is a positive constant. a) is it possible to have such an orbit in central force ? . if so, determine the form of the force function, f(r). b) how the angle θ(t) varies with tirne. note: the differential equation of the orbit for a central force is 瓜(t )

In which situation has the independent variable for the experiment been changed? check all that apply. changed from counting the number of duckweed at day 0 and day 14 to counting them every day changed from testing duckweed growth in beakers to testing duckweed growth in large outdoor tanks changed from testing the effect of ph on duckweed growth to testing the effect of light levels on duckweed growth changed from testing the effect of acid ph on duckweed growth to testing the effect of basic ph on duckweed growth

What are two different ways you could find the value of a? explain these methods.

Aforce of 100 newtons is used to move an object a distance of 15 meters with a power of 50 watts. find the work dine and the time it takes to do the work