When a metal surface is illuminated with light of wavelength 437 nm, the stopping potential for photoelectrons is 1.67 V
(c = 3.00 × 108 m/s, h = 6.626 × 10-34 J • s, e = - 1.60 × 10-19 C, 1 eV = 1.60 × 10-19 J, mel = 9.11 × 10-31 kg)
(a) What is the work function of the metal, in eV?
(b) What is the maximum speed of the ejected electrons?
(a) 1.17 eV (b) 7.66 × 105 m/s
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A projectile leaves the ground at 150 m/s and reaches a maximum height of 0.57 km. If there was no air resistance, at what angle above the horizontal did it leave the ground?
What will be an ideal response?