Physics
Physics, 01.07.2019 20:30, mscharris66

Ido not understand auroras are lights that appear at earth’s northern and southern poles. what is the main cause of an aurora? a. solar wind enters earth’s atmosphere, and particles interact with ions. b. bubbles of gas are ejected from earth’s outer crust. c. sunlight reflects off the surface of the moon during an eclipse. d. the northern and southern poles are cooler than the rest of earth.

answer
Answers: 1

Other questions on the subject: Physics

image
Physics, 22.06.2019 08:30, edjiejwi
The coefficient of friction is a number that represents the resistance to sliding between two in contact with one another.
Answers: 2
image
Physics, 22.06.2019 10:30, austinwst3
You are driving directly behind a pickup truck, going at the same speed as the truck. a crate falls from the bed of the truck to the road. (a) will your car hit the crate before the crate hits the road if you neither brake nor swerve? (b) during the fall, is the horizontal speed of the crate more than, less than, or the same as that of the truck?
Answers: 2
image
Physics, 22.06.2019 13:30, sukiyoshi10
Global warming will produce rising sea levels partly due to melting ice caps but also due to the expansion of water as average ocean temperatures rise. to get some idea of the size of this effect, calculate the change in length of a column of water 1.00 km high for a temperature increase of 1.00ºc. note that this calculation is only approximate because ocean warming is not uniform with depth. (answer in ×10^{-3} −3 m)
Answers: 1
image
Physics, 22.06.2019 15:30, melanieambrosy
To understand the behavior of the electric field at the surface of a conductor, and its relationship to surface charge on the conductor. a conductor is placed in an external electrostatic field. the external field is uniform before the conductor is placed within it. the conductor is completely isolated from any source of current or charge. part a: which of the following describes the electric field inside this conductor? it is in the same direction as the original external field. it is in the opposite direction from that of the original external field. it has a direction determined entirely by the charge on its surface. it is always zero. part b: the charge density inside the conductor is: 0non-zero; but uniformnon-zero; non-uniforminfinite part c: assume that at some point just outside the surface of the conductor, the electric field has magnitude e and is directed toward the surface of the conductor. what is the charge density η on the surface of the conductor at that point? express your answer in terms of e and ϵ0
Answers: 1
Do you know the correct answer?
Ido not understand auroras are lights that appear at earth’s northern and southern poles. what is th...

Questions in other subjects: