The Present Universe Seems to Require a "Cosmological Constant" Equivalent

question 48

Multiple Choice

The present universe seems to require a "cosmological constant" equivalent to that introduced into general relativity by Einstein when his theory would not explain the expected static universe.What is the effect on the evolution of the present universe of the "new" cosmological constant?

• A) It produces a pressure to oppose the mutual gravitational pull of all the matter in the universe,accelerating its expansion.
• B) It is a term that accounts for the negative gravity generated by antimatter in the universe,the presence of which will produce an accelerated expansion.
• C) It just balances gravity to allow the universe to remain static,as Einstein predicted.
• D) It produces an extra attractive force in addition to gravity,slowing down the expansion of the universe.

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Definitions:

FMVSS-121

A specific Federal Motor Vehicle Safety Standard related to air brake systems in trucks and buses, ensuring safe braking performance.

Service Brakes

The primary braking system used in vehicles and machinery for regular stopping and speed control, as opposed to emergency or parking brakes.

Hold-Off Circuit

A control circuit used in hydraulic braking systems, designed to delay the hydraulic pressure application to certain parts of the system.

FMVSS 121

The Federal Motor Vehicle Safety Standard that sets the requirements for air brake systems in commercial vehicles in the United States.