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Naddika [18.5K]
3 years ago
12

Please help me, anyone????

Physics
1 answer:
sergeinik [125]3 years ago
7 0

Answer:

I don't exactly understand this but the child should hear a beep lower than 500 hz when he/she moves the car further away. If you don't find my answer appealing sorry but I don't do physics.

Explanation:

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Yakvenalex [24]

Answer:

3

Explanation:

the answer is number three

5 0
3 years ago
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Calculate the root mean square velocity of nitrogen molecules at 25°c.
umka2103 [35]

Answer:

515.22 m/s

Explanation:

Formula for root mean square velocity is SQRT (3RT/M)

Where,

R = Rydberg's constant = 8.314 Kg. m²/ s². K. mol

T = Temperature in Kelvin

M = Molar mass in Kg/mol

First calculate molar mass,

As nitrogen is diatomic molecule,

Its molar mass is

M = 2(14) = 28 g/mol

Convert unit into Kg/mol

28 g/mol x 1 Kg/1000g = 2.8x10¯² Kg/mol

Convert temperature into kelvin

T = 25 + 273 = 298K

Put all values in formula

Vrms = SQRT (3RT/M)

Vrms = SQRT (3x8.314x298/2.8x10¯²)

Vrms = SQRT (265454. 14)

Vrms = 515.22 m/s

5 0
2 years ago
The electric field intensity between two large,
Ivahew [28]

Answer:

300 is the answer

Explanation:

Hope that this answer will help you

8 0
2 years ago
What is the effective dose to a worker who receives uniform, whole-body dose of 8.4 mGy from gamma-rays and 1.2 mGy from 80-Kev
Vera_Pavlovna [14]

Given :

Whole-body dose of 8.4 mGy from gamma-rays and 1.2 mGy from 80-Kev neutrons.

To Find :

The effective dose to a worker.

Solution :

By the given information effective dose to a worker is given by :

E.D = ( 8.4 × 1.2 × 0.12 ) + ( 1.2 × 1 × 1 )

E.D = 1.2096  + 1.2

E.D = 2.4096

Therefore, the effective dose to a worker is 2.4096 .

3 0
2 years ago
How does a pie chart help form conclusion
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Its easy to create a visual and see major differences between data. If something takes up a large portion of the pie, its easy for you to tell just by looking at it
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3 years ago
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