The difference between the above velocities is that they exist in opposite direction of each other. or it can be said that they are negative vectors of each other.
Answer:
The average acceleration of the bearings is 
Explanation:
Given that,
Height = 1.94 m
Bounced height = 1.48 m
Time interval 
Velocity of the ball bearing just before hitting the steel plate
We need to calculate the velocity
Using conservation of energy

Put the value into the formula



Negative as it is directed downwards
After bounce back,
We need to calculate the velocity
Using conservation of energy

Put the value into the formula



We need to calculate the average acceleration of the bearings while they are in contact with the plate
Using formula of acceleration

Put the value into the formula



Hence,The average acceleration of the bearings is 
Answer:
Heliocentrism is the astronomical model in which the Earth and planets revolve around the Sun at the center of the Universe.
Explanation:
13.6g
136g
Explanation:
Given parameters:
Density of mercury = 13.6g/cm³
Unknown:
Mass of :
1cm³ of mercury
10cm³ of mercury
Solution:
Density is the mass per unit volume of a substance. It is the amount of matter in a given volume.
Density = 
Since the unknown in the problem is mass;
Mass = density x volume
Mass of 1cm³ of mercury = 13.6 x 1 = 13.6g
Mass of 10cm³ of mercury = 10 x 13.6 = 136g
learn more:
Density problems brainly.com/question/3433940
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