Answer:
Explanation:
Kinetic energy gained by alpha particle
= charge x potential difference
1/2 mv² = 3.2 x 10⁻¹⁹ x 3.45 x 10⁻³
.5 x 6.68 x 10⁻²⁷ V² = 11.04 x 10⁻²²
V² = 3.3 x 10⁵
V = 5.74 x 100
= 574 m / s
Mechanical energy is conserved in respect of A , C and D .
Part B
B , C, are unknown .
The marshmallow shrunk because of the increased amount of air pressure. I know this because I have once decreased the air pressure, (put a marshmallow in vacuum chamber), and it expanded.
To solve this problem it is necessary to apply the continuity equations for which it is defined that the proportion of Area in the initial section is equal to the final section. In other words,
Where,
Cross sectional area at each section
Velocities of fluid at each section
The total area of the branch is eighteen times of area of smaller artery. The average cross-sectional area of each artery is 
Therefore the Cross-sectional area at the end is
Applying the previous equation we have then
The ratio of the velocities then is
Therefore the factor by which the velocity of blood will reduce when it enters the smaller arteries is 0.1349
Answer: 9.81m/s^2
Explanation: since it’s free fall and friction is neglected, the magnitude of the ball’s acceleration will be equal to the general acceleration due to gravity which is 9.81m/s^2
