A farsighted person cannot see clearly objects that are closer to her eyes than 60.0 cm
Which one of the following combinations represents the correct focal length and the refractive power of the contact lenses that will enable her to comfortably see the objects at a distance of 25.0 cm from her eyes? A) -42.9 cm, +2.33 diopters
B) -42.9 cm, -2.33 diopters
C) +42.9 cm, +2.33 diopters
D) +42.9 cm, -2.33 diopters
E) +60 cm, +42.9 diopters
C
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A horizontal force of 850 N is needed to overcome the force of static friction between a level floor and a 350-kg crate. If g = 9.8 m/s2, what is the coefficient of static friction?
a. 24.8 b. 2.48 c. 4.04 d. 0.248 e. 2.43
In a double slit experiment, the distance between the slits is 0.2 mm and the distance to the screen is 150 cm. What is the phase difference (in degrees) between the waves from the two slits arriving at a point P when the angular distance of P is 10° relative to the central peak, and the wavelength is 500 nm? (Convert your result so the angle is between 0 and 360°.)
a. 145° b. 155° c. 165° d. 135° e. 95°
Answer the following statement(s) true (T) or false (F)
To create an interference pattern, a quanton beam’s de Broglie wavelength must be larger than an individual quanton.
A ball rolling down an incline has its maximum potential energy at
A) the top. B) a quarter of the way down. C) halfway down. D) the bottom.