Examples on Energy for Astrophysics course

1 m
7.2kg
=




alt 350x10m
=




R
=6720 x 10m



wa
ka: i
as Ms.
F(2.2)r"s C)

-
(7.2) 6370x10 24
x
2



↓ 24 3600
x




=-214 MI



7.7x108 s

6
b) Mei /
.GMm 0.7 741
=




->
-

16.68x10.")(7.2)(4x1024) d) E Ei
=
-
Ei
6378x103
--214 - -
451



451M5
-
237m]
=
-




4044
16.68x10") M
2Tr
② I
⑪ 5.60 106 ⑧
3. 0 T
=

Vor=
x
Mc -
16.48x10")(1.37x102(157)
m
157kg
= =




2(5.6x104)
r 5.6x104
=
2T x5.6x103
-

=1.37 x1024
M

8700
T 87005
= --
1.28 109
x J



=4044 m/s




4. m 9.3
=




r, 1.712E > 10829 x 10
=




rz 4.3RE
=

<2739/x103



⑪

Es:Ei -




W
·x
↓
&
19.3) (0)- (5.68 x10" (9.3)(6x1024)
27391x103
=

I &
19.37(0) -
(3.68x10(9.3)(6x1024)
10829x103




-1.36x109 =
- 3.44x189


2. 1 x 109 J