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2 years ago

What is the answer to this question number 2?

Physics

1 answer:

anzhelika [568]2 years ago

3 0

Answer:

1⁺ ion

Explanation:

Metals in the first group on the periodic table will prefer to form 1⁺ ion. This is because the 1 valence electron in their orbital.

Most metals are electropositive and would prefer to lose electrons than to gain it.

Like all metals, the group 1 elements called the alkali metals would prefer to lose and electron.

On losing an electron the number of protons is then greater than the number of electrons. This leaves a net positive charge.

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3. What exerts a greater force on the table of 2 kg book lying flat or a 2 kg book on its

Darina [25.2K]

Answer:

A book on its side exerts a greater force.

Explanation:

Pressure = Force / Area

Assuming that 1kg = 10N

2kg = 20N

Area of book lying flat = 0.3m × 0.2m

= 0.6m²

Pressure of book lying flat = 20N / 0.6m²

= 30Pa (1 s.f.)

Area of book on its side = 0.2m × 0.05m

= 0.01m²

Pressure of book on its side = 20N / 0.01m²

= 2000Pa (1 s.f.)

Since 2000Pa (1 s.f.) > 30Pa (1 s.f.), a book on its side applies greater pressure than lying flat.

5 0

2 years ago

To make a given sound seem twice as loud, how should a musician change the intensity of the sound?

Serhud [2]

Answer:

C. Quadruple the intensity

Explanation:

The intensity of the sound is proportional to square of amplitude of the sound.

I ∝ A²

$\frac{I_1}{A_1^2} = \frac{I_2}{A_2^2}\\\\I_2 = \frac{I_1A_2^2}{A_1^2}$

When the given sound is twice loud as the initial value, then the new amplitude is twice the former.

A₂ = 2A₁

$I_2 = \frac{I_1A_2^2}{A_1^2} \\\\I_2 = \frac{I_1(2A_1)^2}{A_1^2} \\\\I_2 = \frac{4I_1A_1^2}{A_1^2}\\\\ I_2 = 4I_1$

Thus, to make a given sound seem twice as loud, the musician should Quadruple the intensity

3 0

3 years ago

How did the continental Shelf form? Please help, thank you!! :)

shutvik [7]

The movements of the tectonic plates

6 0

3 years ago

Give 5 real life examples of a tension

Delvig [45]

1.car towing

2.pulling bucket of water

3.gym equipment 

4.crane machine

5.tug of war

6 0

1 year ago

If a proton were released in the electric field above, what direction would it move?

Afina-wow [57]

Answer:

d because the proton would move towards the negative plate

Explanation:

5 0

3 years ago