1. Escribe V, si la afirmación es verdadera o F, si es falsa. Justifica tu respuesta. 1)Un rayo de luz es una línea imaginaria que se traza en dirección perpendicular a la onda.
2)Una onda reflejada es aquella que viaja por el mismo medio de la onda incidente después de alcanzar la frontera entre dos medios.
3) La normal es una recta perpendicular a la línea que divide los dos medios.
4)En los espejos planos el ángulo de incidencia es igual al ángulo de reflexión.
5)En los espejos convexos la luz incide por la parte interna de la superficie esférica.
6)El foco está a una distancia equivalente al doble del radio de curvatura de un espejo esférico.
7)En un espejo esférico una imagen derecha es aquella que está por encima del eje óptico.

Explain the difference between each pair of concepts. a. frequency and relative frequency b. percentage and relative frequency a. select the correct choice below. a. frequency is the total number of observations in a data set. relative frequency is the number of times a particular distinct value occurs. b. frequency is the number of times a particular distinct value occurs. relative frequency is the ratio of the frequency of a value to the total number of observations. c. frequency is the total number of observations in a data set. relative frequency is the ratio of the number of times a particular distinct value occurs to the frequency. d. frequency is the number of times a particular distinct value occurs. relative frequency is the ratio of the frequency of two different values.

When you push downward on a book at rest on a table, you feel an upward force. does this force depend on friction? defend your answer.

Calculate the ratio of h+ ions to oh– ions at a ph = 6. find the concentration of h+ ions to oh– ions listed in table b of your student guide. then divide the h+ concentration by the oh– concentration. record this calculated ratio in table a of your student guide. compare your approximated and calculated ratios of h+ ions to oh– ions at a ph = 6. are they the same? why or why not? record your explanation in table a. what is the concentration of h+ ions at a ph = 6? mol/l what is the concentration of oh– ions at a ph = 6? mol/l what is the ratio of h+ ions to oh– ions at a ph = 6? : 1