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4 years ago

PLEASE I NEED HELP ASAPPPP

Physics

2 answers:

lesya692 [45]4 years ago

7 0

1. 4

2. carbon

3. Bond

blondinia [14]4 years ago

5 0

1. Each carbon atom has 4 valence electrons for forming bonds.
2. C<span>arbon atoms can bond with carbon atoms and with other elements in many different ways.
3. A(n) bond is the force that holds two atoms together.
Hope I helped, and good luck! (:</span>

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How do speed and velocity differ

Elanso [62]

Answer: Speed is a scalar

LVelocity is a vector quantity

Explanation: Scalar quantity such as speed only have magnitude in them. It only indicates the strength on how an object is moving. For velocity it is a vector quantity it both have magnitude and involves direction where the object is moving.

4 0

3 years ago

You need to get to class, which is 282 meters away. You can only walk in the hallway at about 2.0 m/s (if you go any faster, you

worty [1.4K]

Answer:

Time, t = 141 seconds

Explanation:

Given that,

Distance between the class and the person, d = 282 m

Speed of the person, v = 2 m/s

We need to find the time taken by the person to get to your class. Let the time taken is t. The speed of the person is given by :

$v=\dfrac{d}{t}$

$t=\dfrac{d}{v}$

$t=\dfrac{282\ m}{2\ m/s}$

t = 141 seconds

So, the time taken by the person to get to your class is 141 seconds. Hence, this is the required solution.

6 0

3 years ago

A sound wave (a periodic longitudinal wave) from a loudspeaker travels from air into water. The frequency of the wave does not c

Tanzania [10]

Answer:

When the sound wave enters the water its wavelength increase.

Explanation:

Given:

Speed of sound in air $v = 343 \frac{m}{s}$

Speed of sound in fresh water $v' = 1482 \frac{m}{s}$

We know that when wave travel into one medium to another medium frequency doesn't change.

Velocity is given by,

$v = f \lambda$

In above equation frequency is constant,

So when sound wave enters the water wavelength increase because speed sound is increase in water as compare to air.

Therefore, when the sound wave enters the water its wavelength increase.

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3 years ago

Which organism would be a top consumer in a food chain

Kruka [31]

Answer: A herbivore.

Explanation:

A herbivore would be a top consumer in a food chain because they are primary consumers which leads you to secondary consumers who are carnivores to make sure they don't get to over populated and keep balance.

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3 years ago

4. A plane accelerates down a runway due to the constant resultant force of

Doss [256]

Answer:

See below

Explanation:

Net force acting on the plane after overcoming frictional forces is

2.7 x 10^6 - 6.8 x 10^4 - 8.5 x 10^5 = 1 782 000 N

Work = F x d

= 1 782 000 x 1400 m = 2.5 x 10^9 J or 2.5 x 10^6 kJ

4 0

2 years ago