Answer:
Explanation:
For moving particle , the wavelength is given by the expression
E is kinetic energy of the particle
Here particle is electron and its kinetic energy
E = 150 nm
= 1244 / 150
= 8.3 eV
8.3 X 1.6 X 10⁻¹⁹ J
=13.28 X 10⁻¹⁹ J
Putting these values in the expression for wavelength as given above we have
λ = .425 nm
Wave length of electron wave will be 0.425 nm
Hence its wavelength will be smaller and therefore magnitude of angle made by it will also be smaller. So magnitude of β will be smaller than that of α .
Simply put, our solar system is a speck compared to the Milky Way. Our Milky Way galaxy is a whopping 587 trillion light-years across.
Answer:
Factors Affecting the Strength of the Magnetic Field of an Electromagnet: Factors that affect the strength of electromagnets are the nature of the core material, strength of the current passing through the core, the number of turns of wire on the core and the shape and size of the core
Explanation:
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Answer:
Approximately 
(assuming that the car was on level ground.)
Explanation:
When an object of mass 
is moving at a speed of 
, the kinetic energy of that object would be 
.
Initial kinetic energy of the car:
.
After the car comes to a stop, the kinetic energy of this car would be 
because the car would not be moving.
Change to the kinetic energy of the car: 
.
If the car is traveling on level ground, friction would be the only force that contributed to this energy change. Hence:
.
The value of the work that friction did is negative. The reason is that at any instant before the car comes to a stop, friction would be exactly opposite to the direction of the movement of the car.
The work of a force on an object is the dot product of that force and the displacement of that object. The dot product of two vectors of opposite directions is negative. Hence, in this question, the work that friction did on the car would be negative because the friction vector would be opposite to the movement of the car.
