A compressor that squeezes gas between two rotating screws shaped like augers is called a:
A) Rotary compressor. B) Reciprocating compressor.
C) Scroll compressor. D) Screw compressor.
D
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The cosine of an angle that has an adjacent side of 10 inches and a hypotenuse of 14 inches is _____.
a. 0.6984 b. 0.7143 c. 0.7654 d. 0.7692
¿Qué dispositivo se utiliza normalmente para encender o apagar la iluminación en respuesta a sucesiones de acontecimientos conocidos o planificados?
a. Detector de movimiento b. Sensor de infrarrojos c. Sensor de sonido d. Temporizador electrónico
Which statement is NOT correct?
You are attempting to heat the inside of a shed by placing rocks into a hot spring(a geothermally heated natural spring), then moving the rocks inside the shed and letting them warm the room. Once the rocks no longer feel warm, the process is repeated. A. If the heat capacity of the rockswere increased, it will take longer to them heat up, but they would stay warm for longer in the room. B. This is not a heat engine. C. If the rock is the system, then the entropy of the system is increasing when the rock is in the spring and decreasing when the rock is in the shed. D. If the system is “the shed and everything inside it,” then the entropy of the system increases whenever heat is being added, and never decreases. E. Increasing the time spent in the spring may increase the amount of heat delivered to the room by one cycle.
A noncontact instrument commonly used to measure temperature is a(n) _____
a. laser gun b. temperature stick c. infrared thermometer d. thermocouple device