Đặt vào 2 đầu R1 hiệu điện thế U1 = 60v thì I1 = 2.5 A đặt vào 2 đầu R2 hiệu điện thế U1=U2 thì I =7,5 A so sánh R1 và R2

Technician a says that in a fully charged orifice-tube system, the accumulator 3.temperature will be higher than the orifice tube temperature. technician b says that in a properly operating air-conditioning system, the inlet to the compressor should be cool and the outlet from the compressor hot. who is correct? a. technician b b. technician a c. neither technicians a nor b d. both technicians a and b 4. it's 90 °f in the shop with high humidity. what pressure will be shown on the high-side pressure gauge (ac system on)? a. at least 350 psi b. 10 to 50 psi c. 210 to 290 psi d. 40 to 140 psi 5. technician a says that leaking components are usually repaired rather than replaced. technician b says that a replacement o-ring can take care of a leak found at a joint. who is correct? a. technician a b. neither technician a nor b c. both technicians a and b d. technician b 12. technician a says that a system should be recharged with refrigerant until the condenser temperature is equal to the ambient temperature plus 100°f. technician b says that a system should be recharged with the type and amount of refrigerant found on the vehicle's under-hood sticker. who is correct? a. both technicians a and b b. technician b c. technician a d. neither technician a nor b 14. the majority of heat that the cooling system receives from the engine is a. recycled back to the engine. b. wasted. c. directed to the passenger interior. d contaminated air. 18. a schrader valve is able to open only when a. the service cap is removed. b. a special tool is used to disconnect the valve. c. the system has been evacuated. d. an internal depressor seals the connection 19. two technicians are discussing recycling specifications for refrigerant. technician a says that refrigerant oil with 5,000 parts per million (ppm) does not fall within specifications. technician b says that air can only have a maximum of 330 ppm. who is correct? a. both technicians a and b b. technician b c. neither technicians a and b d. technician a 20. two technicians are discussing refrigerant removal. technician a says that all refrigerant must be captured. technician b says that you can vent refrigerant into the atmosphere as long as it contains moisture. who is correct? a. neither technician a nor b b. technician a c. technician b d. both technicians a and b

Acheetah ran 75 meters at a speed of 25 meters per second. how long was the cheetah running? 3 seconds 5 seconds 30 seconds 50 seconds

El año pasado fuimos a guatemala y nos en el hotel amanecer.