Determine the hazard quotient for an adult exposure to cadmium in the air during a 30-year industrial career. Use the U.S. EPA IRIS website to find relevant risk assessment parameters.
What will be an ideal response?
Choose the concentration in air Answers may vary
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Adventitious roots develop below the ground
Indicate whether the statement is true or false.
Why is copper used to connect electrical devices together?
What will be an ideal response?
A 250 V, 500 rpm, dc, separately excited motor is driving a constant-load torque. The motor has a field constant K? = 4 Vs and an armature resistance of 1 ?. Ignore the frictional losses.
a. Calculate the full-load torque. b. Determine the terminal voltage required to block (stop) the motor. c. Determine the terminal voltage needed to rotate the motor at 100 rpm in the reverse direction. d. Calculate the motor speed while the motor is operating at the conditions of part (c), and the polarities of the terminal voltage are reversed. e. Sketch the speed-torque characteristics and show all the operating conditions.
Although not always as aesthetically pleasing as wood and clad doors, the most durable and efficient door slabs are made of ____.
A. fiberglass with a polyurethane foam filling B. fiberglass with a simple foam filling C. vinyl with a polyurethane foam filling D. metal with a polyurethane foam filling