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4 years ago

Metals in group 1 on the periodic table most commonly form which type of ion

Physics

1 answer:

givi [52]4 years ago

7 0

Answer:

Group 1 - the alkali metals. The Group 1 elements in the periodic table are known as the alkali metals.

Explanation:

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It is winter. You are very cold. Your body systems cooperate and respond to the cold in three ways in an effort to keep you warm

erica [24]

Answer:

Explanation:

im sure that the last one and the first are correct and the second one is wrong .

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3 years ago

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What is the name for the change in a stars spectrum when it moves wawy from the earth

Katarina [22]

When a source of light moves away from you, you see the characteristic lines in its spectrum move toward slightly longer wavelengths. Lines in the visible part of the spectrum move toward the red end.

When a source of light moves toward you, you see the characteristic lines in its spectrum move to slightly shorter wavelengths. Lines in the visible part of the spectrum move toward the violet end.

We see these 'shifts' when we look at the spectra of stars. "Red shift" is the change in the spectrum of a star when it's moving away from us, and "Blue shift" is the change when it's moving toward us. These measurements are the only way we have of measuring the radial motion of stars, and their speeds toward or away from us.

The whole subject of why a spectrum shifts toward longer or shorter wavelengths was explained by the Austrian physicist Christian Doppler in 1842, and it's known as the "Doppler Shift" in honor of him and his work.

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4 years ago

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A gas cylinder contains argon atoms (m=40.0 u). The temperature is increased from 286 K (13°C) to 362 K (89°C) (a) What is the c

Rama09 [41]

Answer:

(a). The change in the average kinetic energy per atom is $1.57\times10^{-21}\ eV$ .

(b). The change in vertical position is 2413 m.

Explanation:

Given that,

Mass = 40.0 u

The increased temperature from 286 K to 362 K.

(a). We need to calculate the change in the average kinetic energy per atom

Using formula of kinetic energy

$\Delta K.E=\dfrac{3}{2}k\Delta t$

Put the value into the formula

$\Delta K.E=\dfrac{3}{2}\times1.38\times10^{-23}\times(362-286)$

$\Delta K.E=1.57\times10^{-21}\ eV$

(b). The change in potential energy of the container due to change in the vertical position

We need to calculate the change in vertical position

Using formula of potential energy

$\Delta U=mg\Delta h$

$\Delta h =\dfrac{\Delta U}{mg}$

$\Delta h=\dfrac{1.57\times10^{-21}}{40.0\times1.66\times10^{-27}\times9.8}$

$\Delta h=2412.7=2413\ m$

Hence, (a). The change in the average kinetic energy per atom is $1.57\times10^{-21}\ eV$ .

(b). The change in vertical position is 2413 m.

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4 years ago

The distance between Earth and Mars is 225 million km. When converted using the conversion factor 1 AU = 1.5 × 108 km, the dista

SIZIF [17.4K]

I guess the problem is asking for the distance between Earth and Mars in Astronomical Units (AU).

Since $1 AU = 1.5 \cdot 10^8 km$
and the distance between the two planets is
$d=225 mil. km= 2.25 \cdot 10^8 km$
we can convert this distance into AU by using the following proportion:
$1 AU : 1.5 \cdot 10^8 km = x : 2.25 \cdot 10^8 km$

from which we find
$x= \frac{1 AU \cdot 2.25 \cdot 10^8 km}{1.5 \cdot 10^8 km} =1.5 AU$

7 0

3 years ago

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A bullet is accelerated down the barrel of a gun by hot gases produced in the combustion of gun powder. What is the average forc

elena-14-01-66 [18.8K]

Answer:4.259 kN

Explanation:

Given

mass of bullet $m=0.02 kg$