Which action packs down the soil and depletes vegetation? A. wind erosion B. overgrazing C. sedimentation D. sand dune formation
2 answers:
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Answer:
The potential energy when it reads 40 N is
Explanation:
From the question we are told that
The lowest reading of the spring balance is 0 N and this is at 0 cm = 0 m
The height reading of the spring balance is 60 N and this is at 20 cm = 0.20 m
Generally the length corresponding to the reading of 40 N is mathematically represented as
=>
Generally the potential energy is mathematically represented as
Here
So
=>
Answer: 3MeV electron
Explanation:
m_e={9.1\times 10^{-31} m_α=4\times m_e m_a={9.1\times 10^{-31}
m_p=1.67\times 10^{-27}
(a) K.E. Energy of electron ==3MeV
=1.05\times10^{18}
(b) K.E. Energy of alpha particle ==10MeV
=0.88\times10^{18}
(c) K.E. Energy of auger particle ==0.1MeV
=0.035\times10^{18}
(d) K.E. Energy of proton particle ==400keV
=0.766\times10^{14}
from (a),(b),(c),and (d) we can clearly say that the velocity of the electron is more so the penetration of the electron will be deepest.
Answer:
1.25 s
Explanation:
The motion of the soccer ball is an example of a projectile motion.
So, time taken by the ball to reach the top of the trajectory is exactly half of the total time of flight of the soccer ball.
In a projectile motion, the projectile is thrown at an angle to the ground with some initial velocity. The motion can be divided into two independent direction motions; one in the horizontal direction and the other in the vertical direction.
The time of flight is the time taken by the projectile to reach the ground again.
The formula for time of flight is given as:
Here, . Therefore,
Now, the time taken to reach the top is half of the total time. Therefore,
Therefore, it takes 1.25 s for the ball to reach the top of its trajectory.