Answer:
acceleration is constant, with a value less than 10 m/s²
Explanation:
The force pushing her downward are his weight and the at an angle
The weight is given as
W=mg
The component of the weight along x axis is Wsin θ
Forward force is Wsin θ
This forward force is the only force acting on the x-axis since it frictionless
Then, using newton law
ΣF = ma
WSinθ=ma
mgSinθ=ma
Then, a=gSin θ
Since sinθ is always between 1 and -1
-1<=sinθ<=1
The only time a=g is when It is on a straight line and not an incline plane and since we are give an inclined plane
Then, a will be less that g
Where g is constant =10m/s²
So the correct answer is D
Answer:
Emission nebulea emit light
absorb
reflect
Explanation:
.
Answer:
Check below for the explanations required
Explanation:
The following processes/events take place in the cooling of a fluid.
- A reduction in the kinetic energy of the molecules of the fluid
- The molecular speed reduces ( i.e.there will be a reduction in the speed at which the molecules move)
- The cohesive force between the molecules will increase ( i.e the molecules will no longer be drifted apart, they will now move closer to each other
- The temperature of the fluid reduces as it cools down
- There will be an increase in density
Answer:
1. Main Sequence - middle life 17
2. red
3. blue
4. White dwarf stars are much hotter than Red Supergiants 15. List the color of the stars from hottest to coldest: Blue, White, Yellow, Orange, Red 16.
5. red giants
Explanation:
Main sequence stars have a Morgan-Keenan luminosity class labeled V. red giant and supergiant stars (luminosity classes I through III) occupy the region above the main sequence. They have low surface temperatures and high luminosities which, according to the Stefan-Boltzmann law, means they also have large radii. White dwarf stars are much hotter than Red Supergiants 15. List the color of the stars from hottest to coldest: Blue, White, Yellow, Orange, Red 16. The hottest stars are the blue stars. A star appears blue once its surface temperature gets above 10,000 Kelvin, or so, a star will appear blue to our eyes. The lowest temperature stars are red while the hottest stars are blue. Astronomers are able to measure the temperatures of the surfaces of stars by comparing their spectra to the spectrum of a black body. Most stars, including the sun, are "main sequence stars," fueled by nuclear fusion converting hydrogen into helium. ...
As stars begin to die, they become giants and supergiants (above the main sequence).
Answer:
-36.71%
Explanation:
Using the Generalized Work Energy Principle, the puck is brought to rest by an external force and the system has no kinetic energy
#Denote the stopping distance and force required with a prime and observe from (i) that:
#If stopping distance increases by a factor of 79/50;
So F decreases by 36.71% . we expect force to reduce since the same amount of work is repeatedly done on the system over a long distance.
