Answer the following question given this paragraph: An ideal engine, the most efficient theoretically possible, is called a Carnot Engine. Its efficiency is given by the following formula, where the temperatures are, respectively, the temperature of the exhaust environment and the temperature of the heat input, in Kelvins. In a Carnot engine heat is input and exhausted in isothermal cycles, and the efficiency is . In all real engines heat is lost to the environment, thus the ideal efficiency is never even close to being obtained. Q: What is the name of the the most efficient possible engine? Choices: - excitation engine - diesel engine - ventilation engine - carnot engine A:
carnot engine
(Question)
Answer the following question given this paragraph: Do you like toast? Did you ever look inside a toaster while it's toasting bread? When you push down the lever to turn on the toaster, the metal heating element inside starts to glow orange or red almost instantly. You can see the glowing heating element inside this yellow toaster. The glowing metal shows that the heating element has become very hot. It gets hot so quickly because metals are good conductors of thermal energy. Q: Why does the heating element of a toaster get hot so quickly? Choices: - charged battery - magnetic force - good insulator - good conductor A:
(Answer)
good conductor
Ques: Answer the following question given this paragraph: In an anticline, rocks arch upward. A three-dimensional anticline is a dome. Q: What is a three-dimensional anticline called? Choices: - cave - volcano - cyclone - dome A:
Ans: dome
(Q).
Answer the following question given this paragraph: The Sun heats some areas more than others, which causes wind. The Sun's energy also drives the water cycle, which moves water over the surface of the Earth. Both wind and water power can be used as renewable resources. Q: What is driven by the sun's energy and moves water over the surface of earth? Choices: - sun cycle - tides - weather cycle - the water cycle A:
(A).
the water cycle
Ques:Answer the following question given this paragraph: Almost all fungi reproduce asexually by producing spores. A fungi spore is a haploid cell produced by mitosis from a haploid parent cell. It is genetically identical to the parent cell. Fungi spores can develop into new haploid individuals without being fertilized. Q: Most fungi reproduce asexually by producing what? Choices: - seeds - ions - toxins - spores A:

Ans:spores
Ques: Answer the following question given this paragraph: Q: Respectively, which parts of the circulatory system carry blood from the heart toward capillaries, and return blood to the heart from capillaries? Choices: - parasites and veins - arteries and capillaries - organs and veins - arteries and veins A:
Ans:
arteries and veins