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Engineering

An 120 volt electric motor that draws 5 amps of current operates a winch that lifts a 100 kg. a distance of 300 cm. in 5 seconds.

Find work done by the winch, input power, output power, and efficiency of this system

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Engineering

What are the basic steps in the operation of a solar cell?

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Graham Mccarthy

Engineering

A charge of 2.0 * 10-10 C is to be stored on each plate of a parallel-plate capacitor having an area of 650 mm2 (1.0 in. 2) and a plate separation of 4.0 mm (0.16 in.). (a) What voltage is required if a material having a dielectric constant of 3.5 is positioned within the plates? (b) What voltage would be required if a vacuum were used? (c) What are the capacitances for parts (a) and (b) ? (d) Compute the dielectric displacement for part (a). (e) Compute the polarization for part (a).

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Engineering

Breaks do not overheat true false?

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Ximena Alexander

Engineering

Which utility program reads an assembly language source file and produces an object file?

(A) compiler

(B) linker

(C) assembler

(D) loader

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Engineering

Consider a fully developed flow in a circular pipe (negligible entrance effects), how does the convective heat transfer coefficient vary along the flow direction? a) Gradually decrease b) Gradually increase c) Remain constant d) There is not enough information to determine

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Engineering

Put four red LED as a straight line and connect each of them to a corresponding analog output. Connect a potentiometer to a 5 Volt power source. Divide the 0 to 5 Volt output of the potentiometer into four parts (0 ~ 1.25 Volt, 1.25 to 2.5 Volt, 2.5 to 3.75 volt, and 3.75 to 5 Volt). Write a program to change the brightness of a LED with respect to the voltage. For each 1.25 V interval, the brightness of one LED will be proportional to the output voltage of the connected potentiometer.

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Engineering

What is the mass of a dragster body with a volume of 150 cm3 if it is made of balsa wood?

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Engineering

Example - a 100 kW, 60 Hz, 1175 rpm motor is coupled to a flywheel through a gearbox • the kinetic energy of the revolving components is 300 kJ at rated speed - the motor is plugged to a stop and allowed to run up to 1175 rpm in the reverse direction • calculate the energy dissipated in the rotor

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Engineering

1. Which of the following is not found on a

vehicle's instrument panel?

(a) speedometer

(c) tachometer

(b) horn

(d) fuel gauge

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Rebekah Marquez

Engineering

2+3=5

3+7=17

4+5=19

5+8=37

6+7=

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Lilly Villarreal

Engineering

In remote areas, your gps devices may lose reception. It's a good idea to have a

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Engineering

Silicon is the most widely used semiconductor material for integrated circuits. Which of the following are less common semiconductor materials used for ICs (two best answers) : (a) boron, (b) boron nitride, (c) gallium arsenide, (d) germanium, (e) silicon carbide, (f) silicon dioxide, and (g) zirconium?

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Engineering

If water molecules pass through a membrane with a steady state flux of 220 mole / (m2 day), how long will it take, in hours, for 0.400 kg of water to pass through a 565 square centimeter of the membrane?

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Engineering

What are the effects of applying an additional layer of insulation to a cylindrical pipe or a spherical shell?

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