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3 years ago

Water molecules are made of slightly positively charged hydrogen atoms and slightly negatively charged oxygen

Physics

1 answer:

adelina 88 [10]3 years ago

8 0

Answer:

Surface tension.

Explanation:

Water has this thing called surface tension, where the water, most of the time, is hard to split.

A few examples of surface tension in action:

If you spill some water, you can see that they seem to connect together as if they were magnetic.
You can put around 20-30 drops of water on average on a penny. This shows that water has better surface tension than other liquids, like oil, that can the penny can only hold around 10-15.
Lastly, water bugs (which are kind of like mosquitos) can actually stay on top of the water, because they do not break the surface tension of it.

Hope this helps you!

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In what way does Isaac represent us?

Andrews [41]

Answer:

Derived from the Hebrew יִצְחָק (Yitzhak), the name Isaac means “one who laughs” or “one who rejoices.” In the Old Testament of the Bible, Isaac is the firstborn son of Abraham. He is one of the three biblical patriarchs revered by Jews, Christians, and Muslims. ... Gender: Isaac is traditionally a masculine name.

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2 years ago

The hight A note on the piano has a wavelength of 0.0487 m what’s the frequency ?

Brrunno [24]

Answer:

A modern piano has 88 keys and is tuned to twelve-tone equal temperament. It has its 49th key, the fifth A, also called A4, tuned to a frequency of 440 Hz (referred to as A440).

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3 years ago

A Texas cockroach of mass 0.117 kg runs counterclockwise around the rim of a lazy Susan (a circular disk mounted on a vertical a

kozerog [31]

Answer

given,

mass of cockroach = 0.117 Kg

radius = 17.3 cm

rotational inertia = 5.20 x 10⁻³ Kg.m²

speed of cockroach = 1.91 m/s

angular velocity of Susan (ω₀)= 2.87 rad/s

final speed of cockroach = 0 m/s

Initial angular velocity of Susan

L_s = I ω₀

L_s = 5.20 x 10⁻³ x 2.87

L_s=0.015 kg.m²/s

initial angular momentum of the cockroach

L_c = - mvr

L_c = - 0.117 x 1.91 x 0.173

L_c = - 0.0387 kg.m²/s

total angular momentum of Both

L = 0.015 - 0.0387

L = - 0.0237 kg.m²/s

after cockroach stop inertia becomes

I_f = I + mr^2

I_f = 5.20 x 10⁻³+ 0.117 x 0.173^2

I_f = 8.7 x 10⁻³ kg.m²/s

final angular momentum of the disk

L_f = I_f ω_f

L_f = 8.7 x 10⁻³ x ω_f

using conservation of momentum

L_i = L_f

-0.0237 =8.7 x 10⁻³ x ω_f

$\omega_f = \dfrac{-0.0237}{8.7 \times 10^{-3}}$

$\omega_f = -2.72\ rad/s$

angular speed of Susan is $\omega_f = -2.72\ rad/s$

The value is negative because it is in the opposite direction of cockroach.

$|\omega_f |= 2.72\ rad/s$

b) the mechanical energy is not conserved because cockroach stopped in between.

7 0

3 years ago

Earth's atmosphere is constantly bombarded by cosmic ray protons that originate somewhere in space. If the protons all passed th

nignag [31]

Answer:

Electric current in amperes = 1.1808 A

Explanation:

Given:

Intercept protons rate = 1800 protons per second

Area = 41 × 10⁷ km²

Find:

Electric current in amperes

Computation:

Current density = Intercept protons rate × 1.6 × 10⁻¹⁹

Current density = 1800 × 1.6 × 10⁻¹⁹

Current density = 2.88 × 10⁻¹⁶

1 km² = 10⁶m²

So,

Electric current in amperes = 2.88 × 10⁻¹⁶ × 41 × 10⁷ × 10⁶

Electric current in amperes = 1.1808 A

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3 years ago

How are convergent boundaries different from divergent boundaries

fenix001 [56]

Convergent boundaries: the tectonic plates move toward each other

Divergent boundaries: the tectonic plates move away from each other

5 0

3 years ago