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Leviafan [203]
2 years ago
7

2. A car is sitting at the top of a hill that is 14 m high. The car has a mass of 53 kg. The car has

Physics
1 answer:
Mamont248 [21]2 years ago
5 0
The car has gravitational potential energy (Eg)

Eg = mgh
Eg = (53kg) (9.81N/kg) (14m)
Eg = 7 279.02 J
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The bending of waves such as sound waves, light waves, and waves in water, around obstacles or the edges of openings is called.
kolezko [41]

Answer:

Diffraction

Explanation:

Diffraction is the bending of waves around obstacles and openings. The amount of diffraction increases with increasing wavelength.

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1 year ago
What is the longest possible wavelength for a line in the balmer series
MariettaO [177]

Answer:

" In the Balmer series, the transitions happening in visible range are considered, which range from around 400 nm to 700 nm. The longest wavelength visible in the Balmer series is 656 nm."

Explanation:

Hope this is helpful :)

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3 years ago
a man checked himself into seattle hospital. he didnt know who he was and had no idea how he got to seattle. the hospital staff
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Amnesia would be the answer

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3 years ago
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A 4.0 kg circular disk slides in the x- direction on a frictionless horizontal surface with a speed of 5.0 m/s as shown in the a
finlep [7]

Solution :

Let $m_1=m_2=4$ kg

$u_1 = 5$ m/s

Let $v_1$ and $v_2$ are the speeds of the disk $m_1$ and $m_2$  after the collision.

So applying conservation of momentum in the y-direction,

$0=m_1 .v_1_y -m_2 .v_2_y $

$v_1_y = v_2_y$

$v_1 . \sin 60=v_2. \sin 30$

$v_2 = v_1 \times \frac{\sin 60}{\sin 30}$

$v_2=1.732 \times v_1$

Therefore, the disk 2 have greater velocity and hence more kinetic energy after the collision.

Now applying conservation of momentum in the x-direction,

$m_1.u_1=m_1.v_1_x+m_2.v_2_x$

$u_1=v_1_x+v_2_x$

$5=v_1. \cos 60 + v_2 . \cos 30$

$5=v_1. \cos 60 + 1.732 \times v_1 \cos 30$

$v_1 = 2.50$ m/s

So, $v_2 = 1.732 \times 2.5$

          = 4.33 m/s

Therefore, speed of the disk 2 after collision is 4.33 m/s

5 0
3 years ago
the speed of sound in the air is about 340m/s. what is the wavelength of a sound wave with a frequency of 400Hz?
olga2289 [7]

Wavelength = (speed) / (frequency)

Wavelength = (340 m/s) / (400 /s)

<em>Wavelength = 0.85 meter</em>

5 0
3 years ago
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