Physics, 29.11.2019 04:31 tiaragirl923
When light of wavelength 345 nm falls on a potassium surface, electrons are emitted that have a maximum kinetic energy of 1.67 ev. what is the work function of potassium? the speed of light is 3 × 108 m/s and planck’s constant is 6.63 × 10−34 j · s.
Answers: 3
Physics, 22.06.2019 13:10
Which of the following are used in an electrochemical cell? a. electrodes b. electrolyte c. terminals d. all of the above
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Physics, 22.06.2019 18:00
Astone is thrown with a speed v0 and returns to earth, as the drawing shows. ignore friction and air resistance, and consider the initial and final locations of the stone. which one of the following correctly describes the change δpe in the gravitational potential energy and the change δke in the kinetic energy of the stone as it moves from its initial to its final location? options a.δpe = 0 j and δke = 0 j b.δpe is positive and δke is negative c.δpe = 0 j and δke is positive d.δpe is negative and δke is positive e.δpe = 0 j and δke is negative
Answers: 3
Physics, 23.06.2019 08:40
Ascientist is working with a new kind of quantum dot to make a dye. he is applying newton’s laws to the particle, but it seems to be breaking these laws of physics. which action will most likely the scientist study the particle’s motion? a. he needs to remember that the particle is too large for quantum analysis. b. he must continue to use newtonian mechanics, but he needs to learn more about the particle. c. he needs to use quantum mechanics, not newtonian mechanics, because this is a nanotechnology product. d. he must determine new physical laws that only apply to quantum dots.
Answers: 1
Physics, 23.06.2019 10:00
Work requires a force which causes: potential energy or motion
Answers: 2
When light of wavelength 345 nm falls on a potassium surface, electrons are emitted that have a maxi...
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