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OverLord2011 [107]
3 years ago
11

Sam is walking through the park. He hears a police car siren moving on the street coming toward him. What happens to the siren s

ound as it approaches and then passes Sam?
Physics
2 answers:
xeze [42]3 years ago
7 0
The sound gets louder as it gets closer and when it passes is gets softer
nekit [7.7K]3 years ago
5 0
As it approaches the siren is loud but as it passes the sound is softer and not that loud anymore
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This is a group of elements with few valence electrons that conducts heat and electricity.
k0ka [10]

Answer:

Metals

Explanation:

The group of elements with few valence electrons that conducts heat and electricity is known metals. Metals are good conductors of heat and electricity. The outer electrons in metals are loosely bound to the atom and are thus able to freely move around and conduct electricity and heat.

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A boy takes 20 minutes to cover 3.2 km on a bicycle find the speed in km/hr​
Murrr4er [49]

Answer:

9.6 km/h

Explanation:

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Answer: 9.6 km/h

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2 years ago
The voltage between two parallel plates separated by a distance of 3. 0 cm is 120 v. The electric field between the plates is?
Lapatulllka [165]

The electric field between plates is 4000V/m.

An electric field (sometimes E-field) is the physical field that surrounds electrically charged particles and exerts force on all other charged particles in the field, either attracting or repelling them. It also refers to the physical field for a system of charged particles.

The value of the electric field has dimensions of force per unit charge. In the metre-kilogram-second and SI systems, the appropriate units are newtons per coulomb, equivalent to volts per metre.

The voltage between points A and B is

V=E.d

E =V/d  (uniform E- field only)  

where  d is the distance from A to B, or the distance between the plates.

Given:

distance d = 3 cm

voltage V = 120 V

Electric field E = V/d

                     E = 120 V / 3cm

                     E = 40 V / 1 cm               [ 1 cm = 1/100 m ]

                    E = 4000 V/m.

Learn more about Electric field here:

brainly.com/question/8971780

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Gases have two specific heat values .....?
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A At one constant temp and another at a constant pressure
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The ability of the brain to change in response to experience is called____
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Answer:

I think its structural plasticity.

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