Answer:
Mp= 1.48×10^23 Kg and M = 4.47×10^30 Kg
Explanation:
Given that
Diameter of planet D = 1.8×10^6m
Radius of planet Rp = 0.9×10^6m
Period of rotation of planet = 22.3 hrs = 80280s
Radius of orbit r = 2.2 × 10^11 m
Period of revolution around star T =432days = 432×24×60×60 = 37324800s
Acceleration of gravity on the surface of planet gp = 12.2m/s^2
gp = GMp/(Rp)^2
Mp = gp×(Rp)^2 /G
= 12.2 * (0.9*10^6)^2 ÷ 6.67×10^-11
9.882×10^12 ÷ 6.67×10^-11
Mp= 1.4×10^23 Kg
To determine the mass of the star, we consider the revolution of the planet around the star with period T
T^2 = (4π^2/GM)r^3
M = 4π^2r^3 ÷ GT^2
M = 4π^2* (2.2×10^11)^3 ÷ 6.67×10^-11 × ( 37324800)^2
M= 4.47×10^30 Kg
Many of the symbols are the first one or two letters of the element’s name in English. The first letter of a symbol is always written as a capital letter (uppercase) and the second letter as a small letter (lowercase).
For example
(i) hydrogen, H
(ii) aluminium, Al and not AL
(iii) cobalt, Co and not CO.
Symbols of some elements are formed from the first letter of the name and a letter, appearing later in the name.
Examples are: (i)chlorine, Cl, (ii) zinc, Zn etc.
Other symbols have been taken from the
names of elements in Latin, German or Greek.
For example, the symbol of iron is Fe from its Latin name ferrum, sodium is Na from natrium, potassium is K from kalium. Therefore, each element has a name and a unique chemical symbol.
Answer:
An object's speed or direction can be changed by a force. This means a greater force against a lesser force, and it results in acceleration. This means any push or pull against another equal push or pull. It results in no change of acceleration
Explanation:
The Average acceleration is 3.25m/s².
Acceleration is the change in velocity of the body with respect to time.
Where,
a= acceleration
u= initial speed
v= final speed
t= time
Initially, u = 2m/s
v = 16m/s
t = 3.5s
a = v-u/t
a = 16-2/3.5
a = 4m/s²
Then, u = 26m/s
v = 18m/s
t = 4s
a = v-u/t
a = 26-18/4
a =2 m/s²
Now, u = 0m/s
v = 20m/s
t = 2s
a = v-u/t
a = 20/2
a = 10m/s²
Finally, u = 20m/s
v = 10m/s
t = 2s
a = v-u/t
a = 10-20/2
a = -5m/s²
The average acceleration is the acceleration during the entire journey = 4+2+10-5/4
Average acceleration = 13/4m/s²
Average acceleration = 3.25m/s²
The Average acceleration is 3.25m/s²
Learn more about Acceleration here, brainly.com/question/2303856
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Answer:
4 meter per second square is the acceleration
Explanation:
Force=mass x acceleration
8N= 2kg x acceleration
8N/2kg = acceleration
4 meter per second square is the acceleration.
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