A 10,000-kg rocket blasts off from earth with a uniform upward acceleration of 2.00 m/s2 and feels no air resistance. The upward thrust force its engines must provide during this acceleration is closest to
A) 20,000 N.
B) 980,000 N.
C) 118,000 N.
D) 78,000 N.
Question 2
A long, straight wire carrying a current is placed along the y-axis. If the direction of the current is in the +y direction, what is the direction of the magnetic field due to this wire?
A) clockwise, around the x-axis
B) counterclockwise, around the x-axis
C) counterclockwise, around the z-axis
D) counterclockwise, around the y-axis
E) clockwise, around the y-axis
Uranus's aurorae against its equatorial rings, imaged by the Hubble telescope. Unlike the auror
Scaling the Earth down to the size of a basketball, the Moon is roughly the size of a tennis ball. T
The Mass of Impacts on Earth
Precession: Earth’s axis rotates, or “wobbles”
Earth 150 Million Years Ago
Earth Present