Each of us weighs a tiny bit less inside the ground floor of a skyscraper than we do on the ground away from the skyscraper because the
A) gravitational field is shielded inside the building.
B) mass of the building above slightly attracts us upward.
C) both of these
D) neither of these
Question 2
If you drop a stone into a hole drilled all the way to the other side of Earth (neglect the molten core), the stone will
A) come to an abrupt stop at Earth's center.
B) speed up until it gets to Earth's center.
C) speed up until it reaches Earth's other side.
D) slow down until it reaches Earth's center.
20,000 year old Arctic ground squirrel mummy
President-elect Barack Obama 150 million tiny carbon nanotubes
Great apes knuckle-walk when traveling on the ground.
This is the first portrait of George Washington, painted by John Gadsby Chapman. Washington’s right
Three toddlers sit on the floor playing with a toy.
Andrea Palladio, Plan of main floor (piano nobile), Villa La Rotunda.