What is the force of gravity acting on a 1-kg mass? (g = 9.8 m/s2)


9.8 N

Physics & Space Science

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A steam generator is a device that converts water into steam by capturing radiant heat from hot gases. Consider a 15 foot cubed steam generator, all sides made up of water tubes and a “fire ball” 6 ft. in diameter at 4000ºF at the center. If the water tubes have a surface temperature of 600ºF and an emissivity of 0.7, determine the heat transfer to the water from the combustion gases. Assume the fire ball acts as a black body.

What will be an ideal response?

Physics & Space Science

The interior of Earth is studied by using

a. infrared light waves. b. yellow light waves. c. seismic waves. d. gamma waves.

Physics & Space Science

Components: When rolled down a mountainside at 7.0 m/s, the horizontal component of its velocity vector was 1.8 m/s. What was the angle of the mountain surface above the horizontal?

A. 75° B. 57° C. 33° D. 15°

Physics & Space Science

The lattice spacing of the principal Bragg planes in sodium chloride is 0.282 nm. For what wavelength of x-rays will the first order reflected beam diffract at 55° with respect to the normal to the crystal planes?

A) 0.323 nm B) 0.530 nm C) 0.662 nm D) 0.150 nm E) 0.462 nm

Physics & Space Science