barbaarm000 barbaarm000

03-06-2019
Physics

contestada

How do scientists know the Earth’s magnetic field has reversed itself many times in the past?

Respuesta :

queenxx27 queenxx27

03-06-2019

Answer:

Changing frequency over time

Explanation:

Changing frequency over time. The rate of reversals in the Earth's magnetic field hasvaried widely over time. 72 million years ago (Ma), the field reversed 5 times in a million years.

Answer Link

Otras preguntas

.Here is a 90% confidence interval estimate of theproportion of adults who say that thelaw goes easy on celebrities: 0.645

how many liters of air pass through your lungs in an hour if each breath brings 1 liter of air into the body.

what are the social impacts of climate change ?

help me plzzz pleasee

The supply and demand model assists in analyzing the: relationship between education and employment. growth in the overall level of economic activity. determina

can someone help me??

Look at the table of dissociation constants for some acids. Acid Ka Acetic acid 18 x 10-6 1.2 x 10-2 Chlorous acid Nitrous acid 4.0 x 10 -4 Propionic acid 1.3 x

Which equation is a linear function? Please answer within 5 minutes

tessa burned 357 calories in 42 minutes on the elliptical. ashley only spent 0 minutes on the elliptical and burned 267 calories. who burned calories at a faste

A pyramid and a cone are both 10 centimeters tall and have the same volume. What statement must be true about the two solids? A. The vertical cross-sections of