Answer:(a)10 ft/s
(b)4 ft/s
Explanation:
Given
height of light 
height of man
From diagram
differentiate both sides
Tip of shadow is moving at the rate of
(b)rate at which length of his shadow is changing
Length of shadow is 
differentiating w.r.t time
Answer:
5km
Explanation:
Magnitude of displacement is found by getting the resultant. Resultant is same as the bypotenuse hence
where x is the displacement in west direction and y is displacement in North direction. Substituting x with 3km and y with 4 km then
Answer:
It is a misconception that theories turn into laws with enough research.
Hope it helps
Answer:
Explanation: y’all taking the same test as me hahahahah I got the answers but I can’t attach the picture here so hit me up on snap daniela_0789
Because water is more dense than the object but rubbing alcohol is less dense than the object
