Ganymede is the largest satellite in the solar system

Indicate whether the statement is true or false


TRUE

Physics & Space Science

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What is necessary for convection to occur in a substance?

A) The substance must be subjected to a strong magnetic field. B) Dense material must be added to the substance. C) The substance is strongly shaken or disturbed by a strong wind. D) The substance is strongly cooled from underneath. E) The substance is strongly heated from underneath.

Physics & Space Science

What is the focal length of a magnifying glass that produces an angular magnification of 7.0 x when used by a person with a near point at 28 cm?

A) 2.0 cm B) 3.0 cm C) 4.0 cm D) 5.0 cm E) 6.0 cm

Physics & Space Science

Monochromatic light of wavelength 500 nm is incident normally on a grating. If the third-order maximum of the diffraction pattern is observed at 32° from the centerline, what is the distance between the slits of the grating?

A) 0.93 ?m B) 1.4 ?m C) 2.8 ?m D) 8.5 ?m

Physics & Space Science

A blacksmith is flattening a steel plate that measures 10 cm × 15 cm × 1 mm. He has heated the plate to 900 K. If the emissivity of the plate is 0.75, what is the total rate at which it radiates energy?

The Stefan-Boltzmann constant is 5.670 × 10-8 W/m2 • K4. Ignore any heat it receives from the surroundings. A) 880 W B) 790 W C) 760 W D) 850 W E) 360 W

Physics & Space Science