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3 years ago

Using the ideas from this section and the periodic table, choose the more reactive metal. Cs or Na

Physics

2 answers:

devlian [24]3 years ago

4 0

Explanation:

It is known that both sodium (Na) and cesium (Cs) are group 1 elements. This group is also known as alkali metal group.

Both Na and Cs has one valence electron but size of cesium is much larger than the size of sodium.

This means that larger is the size of atom farther away will be the valence electron(s) from the nucleus. Hence, there will be very less or no force of attraction between the nucleus and valence shell.

Therefore, it will be much easy for a larger atom to lose its valence electron. So, the atom will become more reactive in nature.

Thus, we can conclude that Cs is more reactive than sodium metal.

Elodia [21]3 years ago

3 0

Cs would be most reactive.

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Semenov [28]

The velocity of the eagle is 7.0 m/s

Explanation:

The motion of the fish is a projectile motion, which consists of two independent motions:

- A uniform motion (constant velocity) along the horizontal direction, where the horizontal velocity of the fish is equal to the horizontal velocity of the eagle

- An accelerated motion with constant acceleration (acceleration of gravity) in the vertical direction

We start by analyzing the vertical motion, using the following suvat equation:

$s=ut+\frac{1}{2}at^2$

where:

s = 6.1 m is the vertical displacement of the fish

u = 0 is the initial vertical velocity of the fish

$a=g=9.8 m/s^2$ is the acceleration of gravity

t is the time

Solving for t, we find the time of flight of the fish:

$t=\sqrt{\frac{2s}{a}}=\sqrt{\frac{2(6.1)}{9.8}}=1.12 s$

Now we know that during this time, the fish travels a horizontal distance of

x = 7.9 m

Therefore, the horizontal velocity of the fish is

$v_x = \frac{x}{t}=\frac{7.9}{1.12}=7.0 m/s$

And therefore, this is the initial velocity of the eagle.

Learn more about projectile motion:

brainly.com/question/8751410

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3 years ago

11. A candle is placed in front of a plane mirror. The calculated value of m,

PtichkaEL [24]

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(I think, I was also stuck on this question for a bit)

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2 years ago

21. If the Sun's rays were at 45° to a vertical pillar, how would

diamong [38]

Answer:

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Explanation:

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3 years ago

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2 years ago

A man pushes on piano with mass 170 kg; it slides at constant velocity down a ramp that is inclined at 20.0 ∘ above the horizont

nikdorinn [45]

Answer

given,

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angle of the inclination = 20°

moves with constant velocity hence acceleration = 0 m/s²

neglecting friction

so, force required to pull the piano

F = m g sin θ

F = 170 × 9.81 × sin 20°

F = 570.39 N

so, force required by the man to push the piano is F = 570.39 N

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2 years ago