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seropon [69]
3 years ago
14

Gamma rays have a _____ frequency and a _____ wavelength.

Physics
2 answers:
Troyanec [42]3 years ago
6 0

Answer: D

Explanation:

stiv31 [10]3 years ago
5 0

Answer:

the correct answer is D

Explanation:

Electromagnetic radiation is described by two equations, the first that gives the speed of light

        c = λ f

Where c is the speed of light, λ the wavelength and f the frequency

And the equation that gives the energy of the wave

         E = h f

In general, based on these two equations and their applications, the different areas of the electromagnetic spectrum have different names.  

The gamma radiation is in the high energy range, so it has a high frequency and if the frequency is high, the wavelength must be short. to keep the speed of light constant.

Based on the above, the correct answer is D

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A toy car goes over a small ramp at a horizontal velocity of 1.21 m/s and decelerates at 0.131 m/s2 while in the air. The total
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We need to considerate only the horizontal component of the motion of the toy car.

The formula for the distance in a decelerated motion is:
s = s₀ + v₀·t - 1/2·a·t²

where:
s₀ = initial position = 0
v₀ = initial velocity = 1.21 m/s
t = time elapsed = 0.342 s
a = deceleration = 0.131 m/s²

Plugging in numbers:
s = 0 + 1.21×0.342 - 0.5×0.141×(0.342)²
  = 0.406 m

Hence, the toy car traveled a distance of about 41 cm.

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A 0.5-kilogram apple falls from a height of 2 meters to 1.50 meters. Ignoring frictional effects, what is the kinetic energy of
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The  final kinetic energy of the ball is 2.45 J

Explanation:

We can solve this problem by using the law of conservation of energy.

In absence of frictional effect, the mechanical energy of the apple must be conserved during the fall. So we can write:

U_i +K_i = U_f + K_f

where :

U_i is the initial potential energy, at the top

K_i is the initial kinetic energy, at the top

U_f is the final potential energy, at the bottom

K_f is the final kinetic energy, at the bottom

By explicing the potential energy, we can rewrite the equation as:

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where:

m = 0.5 kg is the mass of the apple

g=9.8 m/s^2 is the acceleration of gravity

h_i = 2 m is the initial height

h_f=1.50 m is the final height

The initial kinetic energy is zero, since the ball starts from rest:

K_i = 0

Therefore we can solve the equation for K_f, the final kinetic energy of the ball:

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Learn more about kinetic energy and potential energy:

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