Answer:
They are reflected back at the same angle they came in
Explanation:
When parallel light rays hit a convex mirror they reflect outwards and travel directly away from an imaginary focal point (F). Each individual ray is still reflecting at the same angle as it hits that small part of the surface.
A) change in ht after 180m = 180 * sin(4-deg.) = 12.56m
net work done by gravity on the cyclist = mass * gravity * height diff.
= 85 * 9.8 * 12.56
= 10470J
= 10.5kJ
B) Kinetic energy = 1/2 * mass * vel.^2 = work done by gravity = 10470J
vel.^2 = 10470 * 2 / 85 = 246.4
vel. = 15.7m/s
Answer:
B. 83.3 cfm
Explanation:
given that the rate of change is,
= 10000 ft³ per 2 hour (note 2 hours = 60 min x 2 = 120 min)
= 10000 ft³ per 120 min
= 10000 / 120 ft³ per min
= 83.3 ft³ per min
The nucleus is a Negative charge I believe