Answer:
Slick and smooth surfaces mediate friction to a low, allowing an object to speed across it with low resistance.
Explanation:
Answer: The closer the planet is to the sun, the faster it travels
Explanation:
The speed of the planets goes down as the chart shows planets farther away from the sun
Answer:

Explanation:
From the question we are told that


Generally the equation for velocity is mathematically given as



Generally the equation for Centripetal acceleration is mathematically given as



Answer:
OPTION A, Kelvin Thermometer is Incorrect
Explanation:
Now, if you consider best two out of three results, then celsius and Fahrenheit thermometers read the same value, meaning both are right.
1) K = °C + 273
K = 100°C + 273
k = 373°C
Kelvin Thermometer is Incorrect
2) 
when we have 212°F

which is correct
Answer:
First, as you may know, the light travels at a given velocity.
In vaccum, this velocity is c = 3x10^8 m/s.
And we know that:
distance = velocity*time
Now, if some object (like a star ) is really far away, the light that comes from that star may take years to reach the Earth.
This means that the images that the astronomers see today, actually happened years and years ago (So the night sky is like a picture of the "past" of the universe)
Also, for example, if an astronomer sees some particular thing, he can apply a model (a "simplification" of some phenomena that is used to simplify it an explain it) and with the model, the scientist can infer the information of the given thing some time before it was seen.