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3 years ago

Neutral Atom: Na, Ca, I, O

Physics

1 answer:

Nina [5.8K]3 years ago

5 0

Answer:

An atom which had neither gained any extra electron nor had lost any of its own electron is a Neutral Atom.

If an atom loses or gains one or more electron it becomes charged ie it becomes ion.

Na is neutral atom with no charge

Ca+2 is an atom which has lost two electrons to become positively charged ion

O-2 is an atom which has gained two electrons to become negatively charged ion

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What is the fundamental frequency on a 8 m rope that is tied at both ends if the speed of the waves is 16 m/s?

lana [24]

Answer:

1 Hz

Explanation:

For rope fixed on both ends the length corresponds to λ/2 (λ is wavelength)\

Thus L = λ/2

=> λ = 16 m

We know that frequency and wavelength are related as

f x λ = v where f is frequency and v is speed of the wave

thus f = v/λ

f = 16/16 =1 Hz

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3 years ago

A motorist drives south at 24.0 m/s for 3.00 min, then turns west and travels at 25.0 m/s for 2.20 min, and finally travels nort

grigory [225]

Answer:

magnitude m = 5440.26 M

average speed is = 25.05 m/s

average velocity = 14.62 m/s

Explanation:

given data

speed v1 = 24 m/s

time t1 = 3 min = 180 s

speed v2 = 25 m/s

time t2 = 2.2 min = 132 s

speed v3 = 30 m/s

time t3 = 1 min = 60 s

total time = 6.2 min = 372 s

to find out

displacement in m and average speed and average velocity

solution

so we find here displacement

displacement = vt .............1

displacement 1 = 24 × 180 = 4220 m south = -4220 j ..........2

displacement 2 = 25 × 132 = 3300 m west = -3300 i ...........3

distance 3 = 30 × 60 = 1800 m

displacement = 1800 cos45 -i + 1800 cos45 j

displacement = -1272.79 i + 1272.79 j .............4

so total displacement D = equation 2 + equation 3 + equation 4

total displacement D = -4220 j -3300 i -1272.79 i + 1272.79 j

total displacement D = -2947.21 j - 4572.79 i

so magnitude m = √(-2947.21)² + (-4572.79)² )

so magnitude m = 5440.26 M

and

average speed is = total distance / time

average speed is = (4220 + 3300+ 1800 ) / 372

average speed is = 25.05 m/s

and

average velocity = total displacement / time

average velocity = 5440.26 / 372

average velocity = 14.62 m/s

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4 years ago

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Jet001 [13]

The amount of energy is ALWAYS conserved based on the law of conservation of energy. Therefore, the amount of energy will remain the same.

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3 years ago

A 20 kg girl runs up the staircase to a floor 4 m higher in 5 seconds. Whats her power output?

Zina [86]

Answer:

Explanation:

P = mgh/t = 20(9.8)(4) / 5 = 156.8 W(atts)

6 0

2 years ago

Momentum ap physics 1

11111nata11111 [884]

Answer:

The correct option is;

B. Object X travels at -2 m/s and object Y travels at 4 m/s after the spring is no longer compressed

Explanation:

The given parameters are;

The mass of object Y = M

The mass of object X = 2·M

The initial velocity of object X and object Y = 0 m/s

Let A represent the velocity of object X after the spring is released and B represent the velocity of object Y after the spring is released, therefore, by the principle of the conservation of linear momentum, we have;

(M + 2·M) × 0 = M × B + 2·M × A

∴ (M + 2·M) × 0 = 0 = M × B + 2·M × A

M × B = -2·M × A

∴ B = -2·A

Therefore, the velocity of the object Y = -2 × The velocity of the object X

Whereby the velocity of the object X = -2, The velocity of the object Y = -2 × -2 = 4

Which gives, object X travels at -2 m/s and object Y travels at 4 m/s after the spring is no longer compressed.

8 0

3 years ago