Answer:
Option D
A type I error is making the mistake of rejecting the null hypothesis when it is actually false.
Explanation:
Error type I is usually represented by alpha symbol and type I error entail making a mistake of rejecting the null hypothesis when it's actually true. Type II error on the other side involves making a mistake of failing to reject null hypothesis when it is actually false. The statement in option D is false because it contradicts the definition of type I error above hence the only false statement in relation to hypothesis testing is option D, A type I error is making the mistake of rejecting the null hypothesis when it is actually false.
Gas Clouds (of Hydrogen), starts contracting under the influence of gravitational pull of gas.
As it's contracting, it's pressure & temperature increases, it is called "Protostar" now.
When Temperature become sufficiently high (4 million C), Nuclear fusion starts, & large amount of energy releases.
Energy Travels to star's surface and is radiated in the form of light, heat & EM Radiation.
The contraction of star stops only when "Inward Gravitational pull" is balanced by "Outward Radiant Energy". At this time, star becomes stable in size & temperature.
Contraction continues, 'causes star's outer region to 'boil' & 'expand'. At this stage, it becomes brightest, red giant.
As fuel burns, helium nuclei fuses & form Carbon nuclei further to silicon & further to Iron Nuclei by progressive Nuclear Fusions. At all this stages, star was very unstable.
Star end it's life in many different way & it depends on it's mass, whether it ends as "White Dwarf", "Neutron Star" or "Supernova"
This was a short note on life story of star. <span>Hope this helps!</span>
Reservoir i think. i’m not sure
Answer:he curve changes noticeably about 7.5 billion years ago,
Explanation: when objects in the universe began flying apart as a faster rate. Astronomers theorize that the faster expansion rate is due to a mysterious, dark force that is pulling galaxies apart. One explanation for dark energy is that it is a property of space
Answer:
Tension in each cable is 3474 N when angle made by the string with horizontal 46 degree
Tension in each cable is 4852 N when angle made by the string with horizontal 31 degree
Explanation:
In this problem, for the boat to be at rest then tension in the strings must be such that the horizontal components balance each other and the vertical components balance weight of the boat.
Consider horizontal components for equilibrium
If the angle made by the string with horizontal 46 degree
Tension the each string is same
Consider vertical components for equilibrium
Tension in each cable is 3474 N when angle made by the string with horizontal 46 degree
If the angle made by the string with horizontal 31 degree, then
Tension in each cable is 4852 N when angle made by the string with horizontal 31 degree
is the wavelength. If we use the data of the problem, we find