Answer:
engine B is more efficient.
Explanation:
We know that Carnot cycle is an ideal cycle for all working heat engine.In Carnot cycle there are four processes in which two are constant temperature processes and others two are isentropic process.
We also kn ow that the efficiency of Carnot cycle given as follows

Here temperature should be in Kelvin.
For engine A



For engine B



So from above we can say that engine B is more efficient.
The type of boot authentication that is more secure is Unified Extensible Firmware Interface
Unified Extensible Firmware Interface help to provide a computer booting that is more secured.
Unified Extensible Firmware Interface is a computer software program that work hand in hand with an operating system, it main function is to stop a computer system from boot with an operating system that is not secured.
For a computer system to boot successfully it means that the Operating system support the Unified Extensible Firmware Interface because it secured.
Inconclusion The type of boot authentication that is more secure is Unified Extensible Firmware Interface
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brainly.com/question/24750986
Answer:
<em>D. Determine saving or debt</em>
Explanation: