The work function of a particular substance is What is the photoelectric cutoff wavelength for this material? Let 1 eV = 1.60 × 10−19 J, the mass of an electron m = 9.11 × 10−31 kg, the speed of light c = 3.00 × 108 m/s, and Planck’s constant h = 4.136 × 10−15 eV ∙ s. 554 nm

393 nm

308 nm

473 nm

i don't know, you need to give me some answers.

explanation:

i think it is non rem sleep

answer; i believe that the correct answer is (d) a very small amount of mass

answer: the exterior temperature of commercial jet planes as they leave the stratosphere and return to the ground increases steadily.

explanation:

the lower most layer of atmosphere is troposphere which extends from 0 to 12 km above the surface of the earth. the temperature initially decreases as distance is increased from the earth's surface. commercial jets fly in lower part of the stratosphere. the stratosphere extends upto 50 km. the temperature in stratosphere starts rising again due to presence of ozone which traps the uv rays.

thus, when the planes leave the stratosphere and return to the ground, the exterior temperature increases steadily.