You push horizontally on a 120-N box that is initially resting on a horizontal table. The coefficient of static friction between the box and the table is 0.75, and the coefficient of kinetic friction is 0.40
Find the friction force on the box if the push is equal to (a) 84 N; (b) 94 N.
(a) 84 N (b) 48 N
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An electron is confined in a harmonic oscillator potential well. What is the longest wavelength of light that the electron can absorb
if the net force on the electron behaves as though it has a spring constant of 74 N/m? (mel = 9.11 × 10-31 kg, c = 3.00 × 108 m/s, 1 eV = 1.60 × 10-19 J, h = 1.055 × 10-34 J ? s, h = 6.626 × 10-34 J ? s) A) 200 nm B) 230 nm C) 220 nm D) 210 nm
An object placed 12 cm from a concave mirror produces a real image 8.0 cm from the mirror. If the object is now moved to a new position 15.0 cm from the mirror, where is the new image located as measured from the mirror?
a. 6.5 cm c. 7.1 cm b. 14.6 cm d. 3.0 cm
A charged particle creates an electric ________ in the space around it
Fill in the blank(s) with correct word
A quantity that has only a magnitude but no direction associated with it is called a __________
Fill in the blank(s) with correct word