1. Why is it unexpected when a spiral galaxy has a flat rotation rate? How does...
1. Why is it unexpected when a spiral galaxy has a flat rotation rate? How does neutrinos help solve this oddity?
Homework Answers
Spiral galaxies has flat rate of rotation that means the rate of rotation of masses at centre and masses at is of galaxy is same which is not obvious because the journey to the centre strongly and hence should be having higher rate of rotation but that's not the case. Now this problem is is solved by the introduction of dark matter and dark energy scientist speculate of course but haven't it product that the dark matter could solve this problem dark matter is nothing but special type of matter that cannot interact with light while dark energy is some kind of anti gravity force.
In your question ask that how neutrino could solve this auditor in my knowledge it's not neutrino it's dark energy and dark matter with solve this problem.
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1. Why is it unexpected when a spiral galaxy has a flat rotation
rate? How does...
Stars in elliptical galaxies move like the bulge or halo stars in spiral galaxies. a. Why...
Stars in elliptical galaxies move like the bulge or halo stars in spiral galaxies. a. Why can’t the rotation curve method to determine mass be used for elliptical galaxies? b. Masses of elliptical galaxies are often derived from their velocity dispersions. This part illustrates how a velocity dispersion can be determined: The intrinsic line-width of a K giant star might be 0.5 Å at a central wavelength λ0 = 5000 Å. Suppose an elliptical galaxy is observed which has a...
1. Why does the direction of rotation change when the battery is reversed in the homopolar...
1. Why does the direction of rotation change when the battery is reversed in the homopolar motor? a. When the battery is reversed, the direction of the current changes. b. When the battery is reversed, there is no longer a net torque on the magnet and screw. c. When the battery is reversed, the orientation of the magnetic field is also reversed.
1/ Sirius A has a luminosity of 9.98 x 10^27 W and a surface temperature of...
1/ Sirius A has a luminosity of 9.98 x 10^27 W and a surface temperature of about 9400K. What is its radius? A/ r = 7.56 x 10^8 m B/ r = 1.34 x 10^9 m C/ r= 1.26 x 10^13 m D/ r = 7.94 x 10^-14 m 3/ which of the following stellar properties is the most fundamental to a star’s main-sequence and post-main sequence life? A/ temperature B/ mass C/ luminosity D/ radius 4/ Stars Moppit and...
1. How does the brain "know" when to increase the breathing rate? What gas is the...
1. How does the brain "know" when to increase the breathing rate? What gas is the gas that "drives" our breathing rate when this gas goes up our breathing rate goes up 2. Why did lan creatures, like us, have to develop a respiratory system in the first place?
A radio controlled car accelerates at a rate of 1 meters per second2 a flat, smooth,...
A radio controlled car accelerates at a rate of 1 meters per second2 a flat, smooth, horizontal track when a force of 97 Newtons is applied. To the nearest integer (in SI units), how much does it weigh? (Read the question carefully!!)
Part 1 How does the rotation speed vary as you move outward for a person sitting...
Part 1 How does the rotation speed vary as you move outward for a person sitting on a playground merry go round? How about the force here, how does this change?
why does the carbonic acid degradation rate increase when in water
why does the carbonic acid degradation rate increase when in water
When a water pump was tested at a rotation rate of 1500 rpm, the following data...
When a water pump was tested at a rotation rate of 1500 rpm, the following data was obtained: Q (I/s) 0 10 20 30 40 50 H(m) 10.0 10.5 10.0 8.5 6.0 2.5 n (%) 0 0.40 0.64 0.72 0.64 0.40 It is proposed to use this pump to draw water from an open well and deliver it to a tank 5.5 m above. The delivery pipe is 20.0 m long and 100 mm diameter, and has a friction factor...
15/04/19 why does a flat distribution from j=0 to j=800 have a probability pj=1/801?
15/04/19 why does a flat distribution from j=0 to j=800 have a probability pj=1/801?
Rotation Homework 1 1.) Clearly explain the difference between rotation and a revolution. near speed called...
Rotation Homework 1 .1.) Clearly explain the difference between rotation and a revolution. 2.) What is linear speed called when something is rotating? 3.) At a constant radius, how does the tangential speed change as the angular velocity increases? 4.) At a constant angular velocity, how does tangential speed change as the radius increases? 5.) A ladybug sits halfway between the axis and the edge of a rotating disk. What will happen to the ladybug's tangential velocity if a.) The RPM rate is doubled? b.) The ladybug...
When a water pump was tested at a rotation rate of 1500 rpm, the following data was obtained: Q (I/s) 0 10 20 30 40 50 H(m) 10.0 10.5 10.0 8.5 6.0 2.5 n (%) 0 0.40 0.64 0.72 0.64 0.40 It is proposed to use this pump to draw water from an open well and deliver it to a tank 5.5 m above. The delivery pipe is 20.0 m long and 100 mm diameter, and has a friction factor...
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