Suppose that a vast secret chamber was built below Presidents' Circle, in the middle of the green. Assume that the chamber is an empty (vacuum-filled) cube, with dimensions 20 meters to a side, with its center point 50 meters below ground level. It has been proposed that an accelerometer, measuring the gravitational acceleration at ground level, can be used to detect the presence of this subterranean cavern: The gravitational acceleration at ground level directly above the chamber would be reduced by an amount dg, compared to a reading with no chamber. Using Newton's law of gravity, an assumed density of the ground material (dirt/rock) of 2500 kg/m^3, estimate the magnitude of dg. There are many ways to solve this problem. However, for the purpose of this exercise, treat sources of gravity as point particles, and use many of them to represent a continuous medium. Write a python script chamber. py that calculates dg in this approximation. Be sure that your answer is good to three significant digits, but use only as many points as you need, roughly speaking, to get to this answer. Submit your python script.

"i have always loved contemporary art and made it a general goal to work within the field. after a few nonprofit internships at museums and galleries, i decided to try the for-profit art world and was offered a job as the ad assistant at the magazine. i much prefer the pace of the for-profit art community and have stayed with the company for three years, with a promotion to an account manager last spring."

i just did this and got a 100.

what is the speed of a softball that travels 20m in 2secs

speed = 20/2 = 10 m/s

the aurora is formed when charged particles emitted from the sun during a solar flare penetrate the earth's magnetic shield and collide with atoms and molecules in our atmosphere. these collisions result in countless little bursts of light, called photons, which make up the aurora.

auroras are generated by charged solar particles hitting molecules in earth's atmosphere. this usually happens in high latitudes, because our planet’s magnetic field tends to funnel these particles toward the poles. that’s why it can be experienced in northern ohio.

0 = 0.40 / 0 = 0

= 0.20 = 9.80 ⁄2 =?

=0 , = = 0.20 =0.50 0 0.40 ⁄

=0−122 =0−12(9.80 ⁄2)(0.50)2 =1.2