False
False, it cannot
false
true
False. You can have total internal reflection where the effective angle is greater than 90 deg
true
false
false
False
false !
true
No, it is not true. Adolescents need as much physical activity as an adult. The human body was meant to move not be immobile. Physical activity for all ages, is good for mental health as well as physical health.
false
false
False
its false :))((:
False.
Yes, listening is a passive activity