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3 years ago

Which elements have similar behavior? barium silicon aluminum strontium osmium beryllium

Physics

1 answer:

choli [55]3 years ago

5 0

Answer:

barium strontium and beryllium

Explanation:

they all are reactive to air and are alkaline earth metals

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3 years ago

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When you jump from an elevated position you usually bend your knees upon reaching the ground. By doing this, you make the time o

dsp73

Answer:

c. about 1/10 as great.

Explanation:

While jumping form a certain height when we bend our knees upon reaching the ground such that the time taken to come to complete rest is increased by 10 times then the impact force gets reduced to one-tenth of the initial value when we would not do so.

This is in accordance with the Newton's second law of motion which states that the rate of change in velocity is directly proportional to the force applied on the body.

Mathematically:

$F\propto\frac{d}{dt} (p)$

$\Rightarrow F=\frac{d}{dt} (m.v)$

since mass is constant

$F=m\frac{d}{dt}v$

when $dt=10t$

then,

$F'=m.\frac{v}{10\times t}$

$F'=\frac{1}{10} \times \frac{m.v}{t}$

$F'=\frac{F}{10}$ the body will experience the tenth part of the maximum force.

where:

$\frac{d}{dt} =$ represents the rate of change in dependent quantity with respect to time

$p=$ momentum

$m=$ mass of the person jumping

$v=$ velocity of the body while hitting the ground.

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3 years ago

When two objects with electrical charges interact, which affect the strength of that interaction?

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The two objects with electrical charges interact, which affect the strength of that interaction <span>amount of charge. The answer is letter A. The rest of the choices do not answer the question above.</span>

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3 years ago

Which elements have similar behavior? barium silicon aluminum strontium osmium beryllium ​

Which elements have similar behavior? barium silicon aluminum strontium osmium beryllium