The Eiffel tower in Paris is made primarily of iron, whose coefficient of linear expansion is about 10 x 10-6/°C. On a cold day when the temperature is –10°C the Eiffel tower is 300 meters tall. Its height on a hot day when the temperature is 40°C is __________
Fill in the blank(s) with correct word
300.15 m
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A 3.00 kg mass is located at x = 2.0 cm and y = -4.0 cm. A 3.00 kg mass is located at x = -5.0 cm and y = 2.0 cm. A 4.00 kg mass is located at x = -3.0 cm and y = -3.0 cm. Where is the location of the center of mass (x, y)?
A. (-0.10 cm, -0.50 cm) B. (-2.1 cm, -1.8 cm) C. (+2.1 cm, -1.8 cm) D. (-2.1 cm, +1.8 cm) E. (+1.1 cm, -2.0 cm)
Two point charges of +1.0 ?C and -2.0 ?C are located 0.50 m apart. What is the minimum amount of work needed to move the charges apart to double the distance between them? (k = 1/4??0 = 8.99 × 109 N • m2/C2)
A) -36 mJ B) +18 mJ C) 0 mJ D) +36 mJ E) -18 mJ
Starting from one oasis, a camel walks 25 km in a direction 30° south of west and then walks 30 km toward the north to a second oasis. What distance separates the two oases?
a. 15 km b. 48 km c. 28 km d. 53 km e. 55 km
As the temperature of a body increases,
a. the body gets brighter b. the color of the body shifts from red to white c. the wavelength of the most intense light decreases d. the frequency of the most intense light increases e. all the above