Answer:
Explanation:
Given that,
The speed of an electron,
We need to find the wavelength of this electron. It can be calculated using De -broglie wavelength concept as :
h is the Planck's constant
So, the wavelength of the electron is . Hence, this is the required solution.
Answer:
yes that is true because if you put the solar thing in the sunlight it gets converted to electricity
velocity=displacement/time
displacement=∆velocity x ∆time
displacement=4x4
16m
Answer:
a)
1.73 m/s
b)
6.43 x 10⁻⁴ m
Explanation:
m = mass of the flea = 1.8 x 10⁻⁴ kg
v₀ = initial speed of the flea = 0 m/s
v = final speed of the flea
W = work done by the force on the flea = 2.7 x 10⁻⁴ J
Using work-change in kinetic energy, Work done is given as
W = (0.5) m (v² - v₀²)
Inserting the values
2.7 x 10⁻⁴ = (0.5) (1.8 x 10⁻⁴) (v² - 0²)
v = 1.73 m/s
b)
d = distance moved by the flea while pushing off
F = Upward force applied on the flea by ground = 0.42 N
Work done is also given as
W = F d
2.7 x 10⁻⁴ = (0.42) d
d = 6.43 x 10⁻⁴ m
The answer is C (They are inversely proportional). I have had this question before and C is the correct answer.