1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
il63 [147K]
3 years ago
12

The slow coning pattern of the spin axis of the Earth's precession will move the end of this axis in a complete circle in a peri

od of_________.
Physics
1 answer:
GREYUIT [131]3 years ago
3 0

Answer:

26000 years

Explanation:

Precession describes the angular motion of the Earth's body. Since the attitude of telescopes relative to the Earth's body can be controlled with high accuracy, and telescopes can measure the direction of incoming light also with high accuracy, the motion of Earth is under permanent high precision monitoring. Thus the basic numerical descriptor of precission, an angular rate of 5029.0966 seconds of arc per Julian century, traditionally denoted p (for precession) is a measured value from observed coordinate changes of thousands of stars over, say, two centuries. The understanding of this value in terms of forces acting on an oblate Earth from the Moon is well understood so that an extrapolation back and forth over a few full cycles contains little uncertainties. Of course, you can find details on the coordinate transformations mentioned above (the direct observational effect of precession) on the net. I was surprised to see that the Wikipedia article on precession covers the astronomical aspect very poorly. You thus better look for other sources.

You might be interested in
What does it mean if a paint sample "matches" a known sample from a vehicle? Does this indicate the same source? Why or why not?
Mandarinka [93]
It wouldn't indicate the same source if the paint was from a different place. If the paint was the same brand and color it would be but if not then no
4 0
3 years ago
The roller-coaster car shown in fig. 6-41 (h1 = 30 m, h2 = 12 m, h3 = 20 m), is dragged up to point 1 where it is released from
maxonik [38]
<span>Since there is no friction, conservation of energy gives change in energy is zero Change in energy = 0 Change in KE + Change in PE = 0 1/2 x m x (vf^2 - vi^2) + m x g x (hf-hi) = 0 1/2 x (vf^2 - vi^2) + g x (hf-hi) = 0 (vf^2 - vi^2) = 2 x g x (hi - hf) Since it starts from rest vi = 0 Vf = squareroot of (2 x g x (hi - hf)) For h1, no hf Vf = squareroot of (2 x g x (hi - hf)) Vf = squareroot of (2 x 9.81 x 30) Vf = squareroot of 588.6 Vf = 24.26 For h2 Vf = squareroot of (2 x 9.81 x (30 – 12)) Vf = squareroot of (9.81 x 36) Vf = squareroot of 353.16 Vf = 18.79 For h3 Vf = squareroot of (2 x 9.81 x (30 – 20)) Vf = squareroot of (20 x 9.81) Vf = 18.79</span>
7 0
3 years ago
The maximum current output of a 60 ω circuit is 11 A. What is the root mean square voltage of the circuit?
goldenfox [79]

Answer:

660V

Explanation:

V=IR

V=?, I=11A,R=60w

V=60 ×11

=660V

8 0
3 years ago
1. Given an element's atomic number and mass number, how can you tell the number of protons and neutrons in its nucleus?
DanielleElmas [232]
C. Number of protons = atomic number; number of neutrons = mass number - atomic number
8 0
2 years ago
Read 2 more answers
A mass of 1.00×10−6 μkg is the same as
tankabanditka [31]
I'm not sure but I know u is 10^6
6 0
3 years ago
Other questions:
  • You are riding on a school bus and suddenly get thrown forward. What did the bus just do?
    15·2 answers
  • Two circuits have identical voltage sources. The only other elements in the circuits are resistors. The resistor in circuit A ha
    12·1 answer
  • 20 points, just need a basic understanding. You are on a mystery planet, what you know is that from a height of 10.0 meters, a d
    11·1 answer
  • Two cars are traveling in the same direction and with the same speed along a straight highway. Does either driver hear a differe
    10·1 answer
  • HIIIIIIIIIIIIIIIIIII WHAT IS 50X550
    7·1 answer
  • If a man bought 1000N of potatoes in Russia and sold it in Africa for the same price, will he be in profit or loss? Explain your
    7·2 answers
  • Anyone know this... pls help its for a grade​
    14·1 answer
  • What level of education is required to obtain a position as a insurance billing specialist ?
    15·2 answers
  • An electric motor is running on 120 V. The current is measured to be 2 A. How many ohms of resistance is the motor
    12·1 answer
  • What speed must an electron have if its momentum is to be the same as that of an x-ray photon with a wavelength of 0. 85 nm?
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!