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Makovka662 [10]
3 years ago
13

When all group iia elements lose their valence electrons, the remaining electron configurations are the same as for what family

of elements? family 1a, the alkali metals family 2a, the alkaline metals family 7a, the halogens family 8, the noble gases
Physics
2 answers:
Orlov [11]3 years ago
8 0
Noble Gases

I hope I helped

ΩΩΩΩΩΩΩΩΩΩ

ArbitrLikvidat [17]3 years ago
7 0
Im going to say, the answer is the halogens family 8. not completely sure<span />
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To determine the muzzle velocity of a bullet fired from a rifle, you shoot the 2.47-g bullet into a 2.43-kg wooden block. The bl
Elza [17]

Answer:

The velocity of the bullet on leaving the gun's barrel is 236.36 m/s.

Explanation:

Given;

mass of the bullet, m₁ = 2.47 g = 0.00247 kg

mass of the wooden block, m₂ = 2.43 kg

initial velocity of the wooden block, u₂ = 0

height reached by the bullet-block system after collision = 0.295 cm = 0.00295 m

let the initial velocity of the bullet on leaving the gun's barrel = v₁

let final velocity of the bullet-wooden block system after collision = v₂

Apply the principle of conservation of linear momentum;

Total initial momentum = Total final momentum

m₁v₁ + m₂u₂ = v₂(m₁ + m₂)

0.00247v₁  + 2.43 x 0  =  v₂(2.43 + 0.00247)

0.00247v₁ = 2.4325v₂ -------(1)

The kinetic energy of the bullet-block system after collision;

K.E = ¹/₂(m₁ + m₂)v₂²

K.E = ¹/₂ (2.4325)v₂²

The potential energy of the bullet-block system after collision;

P.E = mgh

P.E = (2.4325)(9.8)(0.00295)

P.E = 0.07032

Apply the principle of conservation of mechanical energy;

K.E = P.E

¹/₂ (2.4325)v₂² = 0.07032

1.21625 v₂²  = 0.07032

v₂²  = 0.07032  / 1.21625

v₂² = 0.0578

v₂ = √0.0578

v₂ = 0.24 m/s

Substitute v₂ in equation (1), to obtain the initial velocity of the bullet;

0.00247v₁ = 2.4325v₂

0.00247v₁ = 2.4325 (0.24)

0.00247v₁ = 0.5838

v₁ = 0.5838 / 0.00247

v₁ = 236.36 m/s

Therefore, the velocity of the bullet on leaving the gun's barrel is 236.36 m/s.

5 0
3 years ago
If someone walkes 1000m <br> in 20min, what is their speed?
slava [35]

Answer:

Distance - 1000m

Time - 20min

Speed - ?

Use the formula of distance ÷ time = speed.

s = d/t

s = 1000m/20min

s = 50 m/min

Hope this helps, thank you !!

6 0
2 years ago
What do we call a solution that has as many ions as it can hold?
igomit [66]
A saturated solution
7 0
2 years ago
Read 2 more answers
A cruise took 6 hours to fulfill its trip. It travelled at an average
kramer

Answer: 1035

Explanation:

4 0
3 years ago
A gas cylinder at a pressure of 4408 torr contains a mixture of N2, O2, and helium gases. If the partial pressure of N2 gas is 1
inessss [21]

Answer:

P subscript 2 = 4408 - 1520 + 25

P subscript 2 = 4408 - 1545

P subscript 2 = 2863 torr

Partial Pressure for O2 = 2863 torr

Explanation:

In order to get the partial pressure for O2, you are expected to sum that of N2 and Helium then subtract it from the pressure of the gas cylinder

6 0
3 years ago
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