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The velocity of the boat relative to an observer standing on either bank = u = 18 
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Explanation:
Let speed of the boat in still water = u
speed of the river water = v
Relative speed of the boat in the water against the river flow is given by
Upstream speed = u - v ------- (1)
⇒ u - v = 12 ------ (2)
Given that speed of the water = 6
Now velocity of the boat is given From equation (2)
⇒ u = 12 + v
Put the value of v = 6 , we get
⇒ u = 12 + 6
⇒ u = 18
therefore , the velocity of the boat relative to an observer standing on either bank = u = 18
Answer:
A = [L*T^-3]
B = [L*T^1]
Explanation:
The equation
x = A*t^3 + B*t
has multiple terms that when added together result in x. We know x has dimension of length, so all the terms must have dimensions of length too.
A*t^3 = [L]
A*[T^3] = [L]
A = [L/T^3]
A = [L*T^-3]
And
B*t = [L]
B*[T] = [L]
B = [L/T]
B = [L*T^-1]
Answer:
2.28 s
Explanation:
Let g = 9.8 m/s2 and neglect air resistance. The box of sand with an initial velocity of 4.2m/s in free fall would yield the following equation of motion
t = 2.28 or t = -3.14
Since t can only be positive we will pick t = 2.28
s
Because she fell out of a tree
I would say Conduction because you are touching the cookie sheet, even though it is hot (so heat) you are physically touching it so it would not be radiation
