Answer:
82780.42123 m/s
14.45 days
Explanation:
m = Mass of the planet
M = Mass of the star = 
r = Radius of orbit of planet = 
v = Orbital speed
The kinetic and potential energy balance is given by

The orbital speed of the star is 82780.42123 m/s
The orbital period is given by
The orbital period is 14.45 days
Answer:
Ans is 200 J
Explanation:
Given: Force = 20N
Distance = 10m
Work done = Force * displacement
= 20 * 10
= 200 J
ANSWER is c
HOPR THIS WILL BE HELPFUL
Answer:
373 K
Explanation:
To convert from °C to kelvin, you add the value to 273
Therefore,
100°C = (100+273)K
= 373K
Two or more elements that are chemically combined