A machinist is required to manufacture a circular metal disk with area 1300 cm2. (a) What radius produces such a disk
1 answer:
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<h2>Given :</h2>
- mass (m) = 0.77 kg
- velocity (v) = 2.33 m/s
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Answer:
The value is
Explanation:
From the question we are told that
The wavelength is
The velocity is
The mass of electron is
Generally the energy of the incident light is mathematically represented as
Here c is the speed of light with value
h is the Planck constant with value
So
=>
Generally the kinetic energy is mathematically represented as
=>
=>
Generally the ionization energy is mathematically represented as
=>
Answer:
A) They have the same kinetic energies, but different momenta.
Explanation:
Before answering, let's remind that:
- Kinetic energy is a scalar quantity, which is given by:
where m is the mass of the object and v is the speed.
- Momentum is a vector quantity, whose magnitude is given by:
where m is the mass of the object and v is the velocity, and whose direction is the same as the velocity.
By looking at the two definitions, we can say that:
- the two cars have same kinetic energy, because they have same mass and same speed
- The two cars have different momenta, because they do not have same velocity (in fact, their directions are different, since one is heading east and the other one is heading north)