Bartolomeu Dias’s trip around the Cape of Good Hope.Gil Eannes’s trip around Cape Bojador
Answer: The mean of the samples is 32.325.
Proportion of the defective unit is =
Explanation:
The point estimate of the mean of the sample:
First calculate the mean of the 40 samples:
The mean of the samples is 32.325.
Defected pieces in the samples whose life span is less than the 26 days = 2
Proportion of the defective unit is =
Answer:
virtual
Explanation:
because the light rays do not meet at the image position
the other options are definitely wrong because
characteristics of a plane mirror images are that,
it is the same size as the object
it is upright
Answer:
The change in momentum of the two cars is equal and opposite
Explanation:
The change in momentum of an object is given by:
where
m is the mass of the object
is the change in velocity
According to Newton Laws of motion, the force experienced by an object is equal to the rate of change of its momentum:
(1)
where
is the time interval during which the force is applied.
According to Newton's third law of motion, the force exerted by vehicle 1 on vehicle 2 during the collision is equal and opposite to the force exerted by vehicle 2 on vehicle 1. Therefore, we can write:
Using (1), we can rewrite this as:
Where are the changes in momentum of car 1 and 2, and is the duration of the collision. Simplifying, we get
So, the change in momentum of the two cars is equal and opposite.