Eric throws a basketball straight up into the air. As it rises, which form of energy is increasing? A. elastic potential energy
2 answers:
Answer:
C) Gravitational potential energy
Explanation:
As ball is thrown upwards then we can say that speed of the ball will decrease as it will move upwards.
This is due to gravity which act opposite to the motion of the ball
So as the ball is thrown upwards the initial kinetic energy of the ball will start decreasing as it will move upwards
Here we also know that gravitational potential energy of the ball is given as
so as the ball start rising upwards the potential energy of the ball will increase
so here correct answer will be
C) Gravitational potential energy
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Answer:
Explanation:
When a charged particle moves perpendicularly to a magnetic field, the force it experiences is:
where
q is the charge
v is its velocity
B is the strength of the magnetic field
Moreover, the force acts in a direction perpendicular to the motion of the charge, so it acts as a centripetal force; therefore we can write:
where
m is the mass of the particle
r is the radius of the orbit of the particle
The equation can be re-arranges as
where in this problem we have:
is the magnitude of the charge of the electron
is the strength of the magnetic field
The beam penetrates 3.45 mm into the field region: therefore, this is the radius of the orbit,
is the mass of the electron
So, the electron's speed is
Answer:
Explanation:
The Planck Eistein relation, states that the energy of a photon is proportional to its frequency:
h is the Plank constant.The frequency of a photon is defined as the speed of light over its wavelength:
Replacing (2) in (1):