Explanation:
a triple beam balance can measure the mass of one slice of bread
The total mass of the galaxy is 443.4 Solar mass
Orbital velocity (
) = 
where M= weight of galaxy
G= gravitational constatnt =
(given)
R = distance from centre =
Light years (given)=
km (1 ly=
billion km)
v= orbital velocity =
(given)
∴ According to the formula
= 
⇒
(cross multiplying and expanding)
⇒ 
⇒ 
⇒ 
1 solar mass = 
⇒ Mass in solar mass =443.4 Solar mass
⇒ M = 443.4 Solar mass
Learn more about Orbital velocity here :
brainly.com/question/22247460
#SPJ10
Answer: empirical formula
Explanation:
Explanation:
The initial kinetic energy
is


The final kinetic energy
is


The work done W on the car is


The power expended P is


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Since the force he is applying is 5N and he carries it a distance of 10 meters and the displacement and the force are assumed to be in the same direction we have
5*10 <span>so 50 J </span>