A rectangular steel plate with dimensions of 60 cm × 25 cm is heated from 20°C to 150°C. What is its change in area? (Coefficient of linear expansion for steel is 11 × 10^-6/°C.)
a. 0.82 cm2
c. 4.3 cm2
b. 1.1 cm2
d. 6.6 cm2
C
You might also like to view...
The weight that will cause a wire of diameter d to stretch a given distance, for a fixed length of wire, is
A) independent of d. B) proportional to d. C) proportional to d2. D) independent of what the length of the wire is.
When an object is moving in simple harmonic motion, which of the following is at a minimum when the displacement from equilibrium is zero?
a. the magnitude of the velocity c. the kinetic energy b. the magnitude of the acceleration d. the total mechanical energy
An astronaut outside a spaceship hammers a loose rivet back in place. What happens to the astronaut as he swings the hammer?
a. Nothing. The spaceship takes up the momentum of the hammer. b. He moves away from the spaceship. c. He moves towards the spaceship. d. He moves towards the spaceship as he pulls the hammer back and moves away from it as he swings the hammer forward. e. He moves away from the spaceship as he pulls the hammer back and moves toward it as he swings the hammer forward.
An AC circuit consists of a 60-Hz source, a 200-W resistor, and a 1.06-H inductor, all in series. What is the impedance of this circuit?
a. 400 W c. 600 W b. 280 W d. 450 W