El ángulo critico se define como aquel ángulo de incidencia para el cual
el ángulo de refracción es 90. Si hago ø2-90° en la ley de Snell, podemos
ver que el ángulo critico viene dado por: n1 senø crítico=n 2 sen 90°=n2 (1)
Luego tenemos que sen ø critco=n2 / n¹
Un vidrio determinado posee un indice de refracción n=1.50. Cuál es el
ángulo critico para la reflexión total de la
luz que sale de este vidrio y entra en el aire,
para el cual, n=1?
a) 45°
b) 42°
c) 32°
D) 30°

If angle "a" is 25°, angle "b" is: a) equal to angle c b) less than angle c c) greater than angle c

Emmy kicks a soccer ball up at an angle of 45° over a level field. she watches the ball's trajectory and notices that it lands, two seconds after being kicked, about 20 m away to the north. assume that air resistance is negligible, and plot the horizontal and vertical components of the ball's velocity as a function of time. consider only the time that the ball is in the air, after being kicked but before landing. take "north" and "up" as the positive ‑ and ‑directions, respectively, and use ≈10 m/s2 for the downward acceleration due to gravity.

Aleaky 10-kg bucket is lifted from the ground to a height of 15 m at a constant speed with a rope that weighs 0.7 kg/m. initially the bucket contains 45 kg of water, but the water leaks at a constant rate and finishes draining just as the bucket reaches the 15-m level. find the work done. (use 9.8 m/s2 for g.) show how to approximate the required work by a riemann sum. (let x be the height in meters above the ground. enter xi* as xi.) lim n → ∞ n (9.8)(45−3 xi) i = 1 δx express the work as an integral. 0 dx evaluate the integral. (round your answer to the nearest integer.) j