Between hydraulic, Pneumatic, and electric motors, which one is the most environmentally friendly and which one has the highest power to weight ratio
Between hydraulic, Pneumatic, and electric motors, which one is the most environmentally friendly and which one has the highest power to weight ratio
A hydraulic power system, as shown in the picture, has an elevation difference between the reservoir water surface and the downstream water pond surface of H( 7 m). A discharge of 0.8 m3/s flows through the penstock and spins a hydraulic turbine, which in turn drives a generator to produce electric power. Estimate the electric power generated if the head loss through the entrance, penstock and exit is 1 m, L and the efficiency of the turbine and generator are...
Which compound is the most unstable (has the highest energy) in the chemical kinetics experiment? Select one: a. H20 ob. + 0 C. NaOH od toho etor Of. HCL g. -
A hydraulic lift (similar to those used in automotive service stations) has two vertical cylinders, one the left, and one on the right, plus a connecting pathway between them on the bottom. The left cylinder contains a mass of 600kg (which acts like a piston, pushing downward), and has a cross sectional area of 800cm2. The piston on the right has a cross sectional area of 25cm2 and a negligible weight. If the apparatus is filled with oil (ρ =...
Example 1: The electromagnetic spectrum of light is often arranged in terms of frequency. Which one of the following has the highest frequency? a. Visible light b. Microwaves c. infrared light d. Gamma rays e. radio waves f. X-rays g. Ultraviolet light Example 2: The electromagnetic spectrum of light is often arranged in terms of wavelength. Which one of the following has the longest wavelength? a. Visible light b. Microwaves c. infrared light d. Gamma rays e. radio waves f. X-rays g. Ultraviolet light Example 3: Which one of the following has the fastest speed? a. Visible...
1)1000 W of power is supplied to an electric motor, which has an efficiency of 95%. The motor's shaft drives a water pump, which is 70% efficient. The system is steady. Determine the rate at which the mechanical energy of the fluid increases between the inlet and outlet of the pump, and where the difference in energy went. 2)The quality of a saturated liquid-vapour mixture is 100% when the fluid is comprised entirely of Select one: a. Compressed liquid b....
62. Which terrestrial biome has the the highest average temperatures and the most precipitation? -A. Boreal forest -B. Tropical Savanna -C. Temperate seasonal forest -D. Tundra -E. Tropical rainforest 63. What is the relationship between the processes of nitrogen fixation and denitrification -A. Both processes move nitrogen from land to oceans. -B. Both processes move nitrogen to the atmosphere. -C. Both processes remove nitrogen from the atmosphere. -D. Denitrification takes nitrogen from the air and makes it usable by plants;...
An atom of which of the following elements has the highest electron affinity? Select one: a. Br b. Cl c. Rb d. As e. Se An atom of which of the following elements is not diamagnetic in the ground state? Select one: a. Rn b. Ca c. Pt d. Cd e. All are diamagnetic. The general electron configuration for the outermost electrons of the halogens is Select one: a. ns2np4 b. ns2np5 c. ns2np6 d. ns2np2 e. ns2np3 What...
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Which of the following alene is most Stable and which one has the highest heat of hydro-l genation? Why? CH 3 CHснасн. a СН3 Н3СНа С CH3 Hзс `CH3 снуснас - СН3 CH3 CH₃ CH = СН3
Which one of the pairs has a positive correlation (relationship) between them, in general? The number of times a pencil is sharpened and the length of a pencil The diameter of an apple and the weight of an orange The years of experience of an employee and the salary of an employee The age of a car and the resale value of a car
Introduction William Livingston has recently been hired as the CEO of Electrics, Inc. Previously he had been the marketing manager for a large manufacturing company and had established a reputation for identifying new consumer trends. Electrics Inc. is a California-based generator manufacturing company. The company is well known for manufacturing large, heavy-duty generators at a reasonable cost. One of its greatest achievements is that its generators can be easily modified or customized for different applications. The company is considering an...