Answer:
The given vector can be represented in unit vector as
The magnitude of any vector 
is given by
Applying values we get
We know that positive x axis in vertorial form is represented as
taking dot product of both the vector's we get
Answer:
0.78m/s
Explanation:
Now the momentum ensued by the boy throwing the package Is
Mass of package × velocity of package =4.5×13=58.5m/s
This momentum initiated a momentum on the boy-boat system
Total mass of the boy-boat system is 24+53=75kg
Let the velocity ensued by the boat be v.
Hence from conservation of momentum
58.5 =75×v
v= 58.5/75= 0.78m/s
Well latent fingerprints are made of oil and sweat and generally materials that you can't see very easily, so it should be that.
Hope this helps :D
The absence of external force in the outer space, allows the piece of rock to continue moving at the same velocity for thousands of years.
<h3>Absence of external force on the outer space</h3>
The outer space is almost an absolute vacuum, because it's nearly empty. There is no matter such as air in the outer space that will provide an external force needed to change the velocity of the piece of rock.
From Newton's first law of motion, an object in a state of rest or uniform motion in a straight line, will continue in that state unless it is acted upon by an external force.
Thus, the absence of external force in the outer space, allows the piece of rock to continue moving at the same velocity for thousands of years.
Learn more about outer space here: brainly.com/question/24701339
