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3 years ago

How do astronomers use rocks from the moon to estimate the age of the solar system?

Physics

1 answer:

Firlakuza [10]3 years ago

6 0

Answer:

Might be better to use geophysicists to date the moon rock via Radioactive Age-Dating Carbon 12

Explanation:

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A cosmic ray electron moves at 7.45 â 106 m/s perpendicular to the earth's magnetic field at an altitude where field strength is

kupik [55]

The magnetic force on the electron is:
$F=qvB \sin \theta$
where q is the electron charge, v the electron speed, B the magnetic field intensity and $\theta$ is the angle between v and B. Since the electron is traveling perpendicular to the magnetic field, $\sin \theta = \sin 90^{\circ}=1$ , so we can write
$F=qvB$

This force acts as centripetal force of the motion, $F_c = m \frac{v^2}{r}$ , where m is the electron mass and r the radius of the circular orbit. So we can write:
$qvB=m \frac{v^2}{r}$
and by re-arranging this equation, we find the radius of the circular orbit, r:
$r= \frac{mv}{qB}= \frac{(9.1 \cdot 10^{-31}kg)(7.45 \cdot 10^6 m/s)}{(1.6 \cdot 10^{-19}C)(1.10 \cdot 10^{-5}T)}= 3.85 m$

6 0

3 years ago

Assume that the speed of light in a vacuum has the hypothetical value of 18.0 m/s. A car is moving at a constant speed of 14.0 m

Oksi-84 [34.3K]

Answer:

Observed time, t = 5.58 s

Explanation:

Given that,

Speed of light in a vacuum has the hypothetical value of, c = 18 m/s

Speed of car, v = 14 m/s along a straight road.

A home owner sitting on his porch sees the car pass between two telephone poles in 8.89 s.

We need to find the time the driver of the car measure for his trip between the poles. The relation between real and observed time is given by :

$T=\dfrac{t}{\sqrt{1-\dfrac{v^2}{c^2}} }$

t is observed time.

$t=T\times \sqrt{1-\dfrac{v^2}{c^2}} \\\\t=8.89\times \sqrt{1-\dfrac{14^2}{18^2}} \\\\t=5.58\ s$

So, the time observed by the driver of the car measure for his trip between the poles is 5.58 seconds.

4 0

3 years ago

How many electrons are in the third energy level? 2 8 18 20

Blababa [14]

Answer:

B)8

Explanation:

In the first energy level you can have, at most, 2. Every energy level after that wants to have 8 electrons. Valence electrons I believe.

Hope this helps, have a nice day! (^-^)

6 0

3 years ago

Read 2 more answers

The standard wave format for any wave is a (transverse a longitudinal an electromagnetic) wave. When depicting a (transverse a l

Alex17521 [72]

Very wild guess at this one, since I've no idea what "standard wave format" means. First gap would be TRANSVERSE. Second gap could be LONGITUDINAL, or SOUND. Third gap could be ELECTROMAGNETIC (the two possible waves being the ELECTRIC wave and the MAGNETIC wave). http://perendis.webs.com

7 0

4 years ago

Read 2 more answers

Which type of image is formed on a cinema screen?

Taya2010 [7]

Answer:

A real image is formed on a cinema screen.

Explanation:

It is a type of image that is formed when light rays coming from an object meet each other in actual after reflection or refraction. A real image can be easily obtained on the screen. It is always inverted

5 0

3 years ago