The Eiffel tower in Paris is made primarily of iron, whose coefficient of linear expansion is about 10 × 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

Physics & Space Science

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Mort stands on Earth. Velma moves away from him in a rocket, at 299,000 km/s (1000 km/s slower than lightspeed). Mort sends a laser beam toward Velma. As the tip of the beam passes her rocket, Velma observes that

A) the laser beam moves past her at just 1000 km/s. B) the laser beam moves past her at 300,000 km/s. C) Both of the above. D) the laser beam never catches up with her. E) Mort has turned into a giant frog.

Physics & Space Science

Objects that radiate relatively well

A) absorb radiation relatively well. B) reflect radiation relatively well. C) both of these D) neither of these

Physics & Space Science

Light of wavelength 575 nm falls on a double-slit and the third order bright fringe is seen at an angle of 6.5°. What is the separation between the double slits?

A) 5.0 ?m B) 10 ?m C) 15 ?m D) 20 ?m E) 25 ?m

Physics & Space Science

Describe two ways in which an atom can be excited

What will be an ideal response?

Physics & Space Science