40 Chapter 3 Modeling Electrical and Electromechanical Systems Equation (3.70) can be simplified by multiplying both sides by R₁+R₂ €o(R₁ + R₂ + KR₁) = -KR₂ein (1) Finally, the output voltage is ²0 -KR₂ R₁ + R₂ + KR₁ €o = €(1) -R₂ R₁ (3.71) Because the gain K is extremely large, we can take the limit of Eq. (3.72) as K→ ∞o to obtain the output voltage relationship for an ideal op-amp circuit (3.72) (3.73)

An electric hot water heater consumes 3.1 kilowatts of electricity and converts it to heat. How long will it take the water heater to heat a 67 gallon tank of water from 10 degrees Celsius to 50 degrees Celsius? (1 kilogram of water is 0.37 gallons, 1 Calorie = 4200 J).  It may be helpful to refer back to the weekly handout for guidance on this problem. Your final answer should be in minutes (rounded to the nearest 10 minutes).

How can speed be attained from path function and time?

Learning Goal: To understand how to use the relative position and velocity equations to find the linear and angular velocity of members in an assembly. A piston is driven by a crankshaft as shown. The crank arm (member AB) has a length of r₁=0.55 in and the connecting rod (member BC) has a length of r2 = 4.25 in. The crankshaft rotates in the counterclockwise or positive direction. (Figure 1) Figure C 1₂ @₂ @1 0 B X 1 of 2 Part C - Velocity of C Find the magnitude of the velocity of C, vc, when the piston has moved to the new position = 33.0° and p = 6.23°. The crankshaft (member AB) is still rotating at 300 rpm Express your answer to three significant figures and include the appropriate units. ► View Available Hint(s) vc= 15.5 in S Submit Completed Part D - Rotational Speed of the Crankshaft W1 = Previous Answers The velocity of the piston is vc = 70.0 in/s j the instant when 0 = 33.0° and = 6.23°. Find the rotational speed of the crankshaft (member AB) at this instant. The crankshaft…