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A1.30kg nano -satelite (a cube Salt )with a side length of 100.0mmis sitting on a workshop bench on the moon.
The acceleration due to gravity is 1.6 ms
calculate the pressure ?
Giant pulses from energetic pulsars have been observed with S5GHz = 10 kJy, but with durations of only 10 ns. The region from where a pulse of radiation originates must be no larger than the distance that light can travel during the duration of a pulse. If the pulsars are at a distance of 1 kpc, estimate the brightness temperature of these sources.
Neutron stars are some of the densest objects in the universe. They form during supernova explosions and are very small compared to other astronomical objects. You can assume 5 x 1017 kg/m3 as the average density of a neutron star. The Earth has a total mass of about 5.97 x 1024 kg. What would be the diameter of the Earth if it had the density of a neutron star?
Neutron stars are some of the densest objects in the universe. They form during supernova ex-
plosions and are very small compared to other astronomical objects. You can assume 5 x 10^17
kg/m3 as the average density of a neutron star. The Earth has a total mass of about 5.97 x 10^24 kg.
What would be the diameter of the Earth if it had the density of a neutron star?
Please answer with explanation.
Assumethat a gravitational anomaly inthe solar systemhas shi ed a field of asteroids into Earth’s
orbit, and the field is now moving directly towards Earth. The asteroid field has a density of ρ
(asteroids/volume), and each asteroid has an average mass of m. The asteroid field stretches
over a distance d in Earth’s path. Assume that the Earth moves with a velocity of v, the asteroids
with u, and that v u. Let R be the radius and M the mass of the Earth. The Earth collides with
the asteroid field:
Show that the slow-down ∆v of the Earth due to the asteroid collisions is given by:
∆v = v 1 − 1 + πR12dρMm
On a different day at local midnight, Orion the Hunter was found to have just crossed the
local meridian too. Which constellation is the Sun approximately found in? Hint: at local
midnight, the hour angle of the sun is defined to be 12h if we were to set 0h to be at noon.
One fateful winter evening, Orion the Hunter was found to have just crossed the local meridian.
Given that Alnilam, the middle star of the 3 along the “Belt of Orion” has RA/DEC: 5h 36
min/ ́1
̋1211
2
, what is the local sidereal time at that instance?
Why is it important to position the JWST behind the Earth?
neutron stars are some of the densest objects in universe. The form during supernova explosions and very small compared to other astronomical objects you can assume 5*10¹⁷kg/m³ as the average density of a neutron star The earth has a total mass of about 5.97*10²⁴kg what would be the diameter of the earth if it had the density of a neutron star
Exotic matter is matter that doesn't obey conventional scientific law, right? Would it be possible, at least theoretically, for a living being made of exotic matter to exist? If so, could such a being possess qualities that would seem supernatural?
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#339914 on Dec 2023