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Engineering

Gabrielle Griffith

What event causes the formation of trenches in Earth's crust

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Engineering

Sherlyn

Humans have fished the prawns and small fish in an estuary to near extinction. Describe the impact this could have on the bacteria and mold population as well as the heron and pelican populations.

Enter your answer in the space provided.

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Engineering

Ali Moyer

If the 250-lb block is released from rest when the spring is unstretched, determine the velocity of the block after it has descended 5 ft. The drum has a weight of 50 lb and a radius of gyration of k0 =.5 ft about its center of mass 0

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Engineering

Valdez

A well-insulated, rigid vessel contains 3 kg of saturated liquid water at 40°C. The vessel also contains an electrical resistor that draws 10 A when 50 V are applied. Determine the final temperature in the vessel after the resistor has been operating for 30 min. (Solve this problem using appropriate software.)

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Engineering

Rhys Vasquez

Where does the voltage in a circuit come from?

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Engineering

Moriah Bruce

What type of damage is reduced by installing impact resistant glass functional shutters and double door top and bottom latches

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Engineering

Doc

In which forms do MOST of the Sun's energy reach Earth's surface?

A. X-rays and gamma rays

B. visible light and infrared light

C. radio waves and microwaves

D. ultraviolet light and visible light

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Engineering

Susan Marquez

Is a gas turbine a heat engine?

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Engineering

Greer

3. A power cycle operates between hot and cold reservoirs at 500 K and 310 K respectively. At steady state the power output developed is: 0.1 MW. What is the minimum rate of energy rejection by heat transfer to the cold reservoir, in MW

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Engineering

Kaydence Saunders

A pressure gage at the inlet to a gas compressor indicates that the gage pressure is 40.0 kPa. Atmospheric pressure is 1.01 bar. The absolute pressure at the exit is 6.5 times the absolute pressure at the inlet. What is the absolute pressure of the gas at the inlet and what is the gage pressure of the gas at the exit?

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Engineering

Justine Lester

If 65 gallons of hydraulic oil weighs 350lb, what is the specific weight of the oil in lb/ft^3?

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Engineering

Darnell Perry

A machine operates using air flow under steady conditions with the following inlet and exit flow parameters. At the inlet, the pressure is 1.75 MPa at a temperature of 300 K. The inlet velocity is 25 m/s. The inlet diameter is 20 cm. At the outlet, the pressure is decreased to 55 kPa at a temperature of 500 K. The outlet velocity is 100 m/s. The elevation increase between the inlet and outlet is 100 m. The machine includes a turbine operating at 5 kW

Determine mass flow rate through the machine.

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Engineering

Elian Yu

Determine if each of the following statements is true or false:

1. Larger atoms are better nucleophiles due to polarizability.

2. The identity of the nucleophile affects the rate of an SN1 reaction.

3. SN2 reactions proceed via frontside attack.

4. Bimolecular reactions tend to be stereoselective.

5. SN2 reactions invert all stereocenters in a haloalkane.

6. Cl-, OH-, and H - are good all leaving groups.

7. Good bases tend to be good nucleophiles

8. Branching adjacent to a reacting carbon slows SN2 reactions due to steric hindrance.

9. SN1 reactions are slowed by hyperconjugation of the carbocation intermediate.

10. The rate determining step for SN1 reactions is the same as the rate determining step for E1 reactions.

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Engineering

Rose Coffey

For the following gear train, if the blue gear is moving at 50 rpm, what are the speeds of the other gears?

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Engineering

Kason

Which valve assembly would you rather have in your vehicle?

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