Which rule states that electrons occupy the lowest available energy orbital?
1 answer:
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Answer:
(a)
(b) I =428
(c)
Explanation:
GIVEN
mass = 18.2 kg
radial arm length = 3.81 m
velocity = 49.8 m/s
mass of arm = 22.6 kg
we know using relation between linear velocity and angular velocity
for angular acceleration, use the following equation.
since
here for one circle is 2 π radians. therefore for one quarter of a circle is π/2 radians
so for one quarter
on solving
(b)
For the catapult,
moment of inertia
For the ball,
so total moment of inertia = 428
(c)
(a) the initial kinetic energy of the projectile is equal to:
The projectile is fired straight up, so at the top of its trajectory, its velocity is zero; this means that it has no kinetic energy left, so for the law of conservation of energy, all its energy has converted into potential energy, which is equal to
b) If the projectile is fired with an angle of
, its velocity has 2 components, one in the x-direction and one in the y-direction:
This means that at the top of its trajectory, only the vertical velocity will be zero (because the horizontal velocity is constant, since the motion on the x-axis is a uniform motion). Therefore, at the top of the trajectory, the projectile will have some kinetic energy left:
For the conservation of energy, the initial energy mechanical energy must be equal to the mechanical energy at the highest point:
the initial kinetic energy is the same as point a), so we can re-arrange this equation to find the new potential energy at the top of the trajectory:
The projectile is fired straight up, so at the top of its trajectory, its velocity is zero; this means that it has no kinetic energy left, so for the law of conservation of energy, all its energy has converted into potential energy, which is equal to
b) If the projectile is fired with an angle of
This means that at the top of its trajectory, only the vertical velocity will be zero (because the horizontal velocity is constant, since the motion on the x-axis is a uniform motion). Therefore, at the top of the trajectory, the projectile will have some kinetic energy left:
For the conservation of energy, the initial energy mechanical energy must be equal to the mechanical energy at the highest point:
the initial kinetic energy is the same as point a), so we can re-arrange this equation to find the new potential energy at the top of the trajectory: