Title
Cosmic Acceleration : Impacts on Black Hole Thermodynamics and Accretion: Current Universe is facing Cosmic acceleration : Large,Used
Delivery time: 8-12 business days (International)
After 1998 from different observational data we are quite convinced to speculate that our universe is going through an accelerating expansion. Different models are there to analyse this fact. It is to be noted that a large part of these models says about a future singularity which will occur in a finite time(coined as Big Rip). In such a surrounding what will be the fate of the compact objects like black holes? On 2004 E. Babichev et al for the first time have shown that if the fluid which is required to explain the accelerated universe(a negative pressure creating one) is assumed to accrete upon a black hole, the mass of the black hole may get reduced with time. On 2010 R. Biswas et al have shown if such fluids start to accrete the accretion disc may get fainter. Even for galactic accretion the speed of accrete in will be dominated by the speed of wind out. Even it was verified that the generalised second law of thermodynamics is not at all been violated by this process. Thermodynamics studies of black holes say that they are more unstable when they are embedded in expanding universe.
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Shipping & Returns
Shipping
We ship your order within 2–3 business days for USA deliveries and 5–8 business days for international shipments. Once your package has been dispatched from our warehouse, you'll receive an email confirmation with a tracking number, allowing you to track the status of your delivery.
Returns
To facilitate a smooth return process, a Return Authorization (RA) Number is required for all returns. Returns without a valid RA number will be declined and may incur additional fees. You can request an RA number within 15 days of the original delivery date. For more details, please refer to our Return & Refund Policy page.
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Warranty
We provide a 2-year limited warranty, from the date of purchase for all our products.
If you believe you have received a defective product, or are experiencing any problems with your product, please contact us.
This warranty strictly does not cover damages that arose from negligence, misuse, wear and tear, or not in accordance with product instructions (dropping the product, etc.).
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Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
We accept payments with :
Visa, MasterCard, American Express, Paypal, Shopify Payments, Shop Pay and more.