Explanation:
The atmosphere is heated in several ways - heat from the core of the Earth, by radiation from the Sun, conduction from contact with warm land and water, convection to even out the temperature and by absorption of infrared radiation from the warm land and water. The core of the Earth is very hot.
Answer:
Approximately
.
Explanation:
Consider two objects of mass
and
. Let
denote the distance between the center of mass of each object. Let
denote the gravitational constant. (
.)
By Newton's Law of Universal Gravitation, the size of gravitational attraction between these two objects would be:
.
In this question,
and
are the mass of the two planets. The distance between the two planets is
(approximately the same as the distance between the center of mass of planet Earth and the center of mass of Mars.)
Apply Newton's Law of Universal Gravitation to find the size of gravitational attraction between the two planets:
.
Since
, the size of gravitational attraction between the two planets would be approximately
.
Answer:
The velocity of the ions relative to the earth observer is ![v = 0.63 c](https://tex.z-dn.net/?f=v%20%3D%200.63%20c)
Explanation:
From the question we are told that
The speed of the alien ship is ![v_a = 0.3c](https://tex.z-dn.net/?f=v_a%20%20%3D%200.3c)
The speed of the iron gun is ![v_g = 0.4c](https://tex.z-dn.net/?f=v_g%20%20%3D%20%200.4c)
The motion of the ions relative to the earths observer can be mathematically represented as
![v = \frac{v_a + v_g}{[\frac{1+ v_av_g}{c^2} ]}](https://tex.z-dn.net/?f=v%20%20%3D%20%20%5Cfrac%7Bv_a%20%2B%20v_g%7D%7B%5B%5Cfrac%7B1%2B%20v_av_g%7D%7Bc%5E2%7D%20%5D%7D)
substituting values
![v = \frac{ 0.3c + 0.4c}{[\frac{1+ 0.3c * 0.4c}{c^2} ]}](https://tex.z-dn.net/?f=v%20%20%3D%20%20%5Cfrac%7B%200.3c%20%2B%200.4c%7D%7B%5B%5Cfrac%7B1%2B%200.3c%20%2A%200.4c%7D%7Bc%5E2%7D%20%5D%7D)
=> ![v = 0.63 c](https://tex.z-dn.net/?f=v%20%3D%200.63%20c)
Using the conversion:
(F - 32) / 9 = C/5 F = Fahrenheit
C = Celsius
(F - 32) / 9 = 20/5
F-32 = 9*(20/5)
F - 32 = 9*4
F - 32 = 36
F = 36 + 32
F = 68
So it is 68 degrees <span>Fahrenheit</span>.