A stunt plane turns off its motor and begins hurtling towards the earth. Every second, the pilot releases a puff of smoke for the audience to see. Neglecting air resistance as the plane falls, what does the audience notice about the puffs of smoke?
A)
The puffs of smoke are separated by random distances as the plane falls.
B)
The puffs of smoke have the same distance between them as the plane
falls.
The puffs of smoke have less and less distance between them as the plane
falls
D)
The puffs of smoke have more and more distance between them as the
plane falls

Which quantities are scalars? choose all that apply a.distance b.speed c. acceleration d.velocity

First, launch the video below. you will be asked to use your knowledge of physics to predict the outcome of an experiment. then, close the video window and answer the question at right. you can watch the video again at any point. part a as in the video, we apply a charge +q to the half-shell that carries the electroscope. this time, we also apply a charge –q to the other half-shell. when we bring the two halves together, we observe that the electroscope discharges, just as in the video. what does the electroscope needle do when you separate the two half-shells again? view available hint(s) as in the video, we apply a charge + to the half-shell that carries the electroscope. this time, we also apply a charge – to the other half-shell. when we bring the two halves together, we observe that the electroscope discharges, just as in the video. what does the electroscope needle do when you separate the two half-shells again? it deflects more than it did at the end of the video. it deflects the same amount as at end of the video. it does not deflect at all. it deflects less than it did at the end of the video. submit

The 10-kg double wheel with radius of gyration of 125mm about o is connected to the spring of stiffness k = 600 n/m by a cord which is wrapped securely around the inner hub. if the wheel is released from rest on the incline with the spring stretched 225 mm, calculate the maximum velocity v of its center o during the ensuing motion. the wheel rolls without slipping