A design project requires a TiNi wire to be shaped like the letter S at an operating temperature of 100°C (212°F). The selected TiNi atom arrangement starts to distort at a temperature of 90°C (194°F) and the distortion is finished at a temperature of 60°C (140°F). The wire was drawn straight at a temperature of 500°C (932°F), and the wire supplied is straight. The wire is easily bent into the required S shape at room temperature. What will be the shape of the wire at the operating temperature of 100°C (212°F)?
(a) S shaped
(b) C shaped
(c) Straight
(d) The shape is impossible to know.
(c) Straight
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The electric field 1.5 cm from a very small charged object points toward the object with a magnitude of 180,000 N/C. What is the charge on the object? (k = 1/4??0 = 8.99 × 109 N ? m2/C2)
A) +4.5 nC B) -5.0 nC C) +5.0 nC D) -4.5 nC
Uranus was discovered by accident, and mistaken for a comet at first
Indicate whether the statement is true or false
Which telescope imaged the center of the Milky Way Galaxy at a wavelength of 8 microns to reveal the distribution of the dusty interstellar medium?
a. Spitzer Space Telescope b. infrared telescope c. European Southern Observatory d. X-ray telescope e. radio telescope
Process of Science: Given that Einstein's equations naturally showed the possibility of an accelerating Universe, why have astronomers only recently found strong evidence for dark energy?
What will be an ideal response?