URGENT HELP PLS 1. Given a force-displacement curve as shown in the figure, what does the area of the region enclosed by the curve represent?

A. The force acting on the object

B. The displacement of the object

C. The magnitude of the coefficient of static friction

D. The work done on the object by the force

Estimate the schwarzschild radius (in kilometers) for a mini-black hole formed when a superadvanced civilization decides to punish you (unfairly) by squeezing you until you become so small that you disappear inside your own event horizon. (assume that the your weight is 50 kg)

What is the name of the perceived change in a sound wave’s frequency due to motion between the observer and the sound source?

Light from two different sources are incident upon the same side of a polarizing filter. light from one source is polarized with total intensity ip, while light from the other source is unpolarized with total intensity iu. as you rotate the polarizing filter through 360 degrees, the intensity of the transmitted light on the other side varies by a factor of 9. what is the relative intensity of the initial polarized source to the unpolarized source, or ip/iu?