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3 years ago

O Which two elements will be the most alike and why?

Physics

2 answers:

katrin [286]3 years ago

8 0

LITHIUM AND SODIUM BECAUSE THEY ARE BOTH METALS SODIUM IS AN EARTH METAL WHILE SODIUM IS AN ALKALINE EARTH METAL

Pavel [41]3 years ago

5 0

C. Because they are in the same group, so they have the same number of valence (outer) electrons

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marta [7]

This gots to be the answer, average, seawater in the world's oceans has a salinity of approximately 3.5%, or 35 parts per thousand.

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2 years ago

Give 5 examples of physical properties that could be used to describe a solid

ycow [4]

1.) appearance
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3 years ago

The electric flux through a spherical surface is 1.4 ✕ 105 N · m2/C. What is the net charge (in C) enclosed by the surface?

Anit [1.1K]

Answer:

The value is $Q_{net} = 1.239 *10^{-6} \ C$

Explanation:

From the question we are told that

The electric flux is $\Phi = 1.4*10^{5} \ N\cdot m^2/C$

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$Q_{net} = \Phi * \epsilon_o$

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$\epsilon_o = 8.85*10^{-12} \ \ m^{-3} \cdot kg^{-1}\cdot s^4 \cdot A^2$

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2 years ago

A cue ball, moving with 9.0 N·s of momentum strikes the nine-ball at rest. The nine-ball moves off with 2.0 N·s in the original

lisov135 [29]

Answer:

P = 7.28 N.s

Explanation:

given,

initial momentum of cue ball in x- direction,P₁ = 9 N.s

momentum of nine ball in x- direction, P₂ = 2 N.s

momentum in perpendicular direction i.e. y - direction,P'₂ = 2 N.s

momentum of the cue after collision = ?

using conservation of momentum

in x- direction

P₁ + p = x + P₂

p is the initial momentum of the nine balls which is equal to zero.

9 + 0 = x + 2

x = 7 N.s

momentum in x-direction.

equating along y-direction

P'₁ + p = y + P'₂

0 + 0 = y + 2

y = -2 N.s

the momentum of the cue ball after collision is equal to resultant of the momentum .

$P = \sqrt{x^2+y^2}$

$P = \sqrt{7^2+(-2)^2}$

P = 7.28 N.s

the momentum of the cue ball after collision is equal to P = 7.28 N.s

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2 years ago

Calculate the mass of a liquid with a density of 2.5 g/ml and a volume of 15ml

Nana76 [90]

Using the density equation and clearing mass:

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3 years ago