2 years ago

Which of the three kinds of radiation is dangerous to us and why?

1 answer:

4 0

There is alpha, beta, and gamma radiation. Gamma radiation can damage our tissue and DNA. Alpha and Beta can deflected but even gamma radiation can somewhat pass through concrete.

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What are prevailing winds?

Tems11 [23]

Answer:

D) winds that blow in the same direction at a consistent speed

Explanation:

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7 0

3 years ago

Created from the ...... of ..... in layers over long periods of time

Setler79 [48]

Sedimentary rocks. Not sure though

8 0

3 years ago

How many PO43? ions are in a mole of K3PO4?

adoni [48]

K₃PO₄ → 3K⁺ (aq) + PO₄³⁻(aq)

One mole of PO₄³⁻ ion gets dissociated from one mole of K₃PO₄

As per the definition of Avogadro's number, 1 mole = 6.022 x 10²³ ions

One mole of PO₄³⁻ ions x (6.022 x 10²³ ions/ 1 mole of PO₄³⁻ ions )

= 6.022 x 10²³ ions

Therefore , there are 6.022 x 10²³ PO₄³⁻ ions in a mole of K₃PO₄.

7 0

2 years ago

Please help me. Quickly!!!

Tomtit [17]

Answer:

500

Explanation:

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3 years ago

Las capas del lecho marino del Mar Mediterráneo cuentan la historia de los cambios ambientales en el hoy desértico norte de Afri

slamgirl [31]

Answer:

160.000 años corresponde a 16.000 décadas.

Explanation:

Para resolver correctamente el ejercicio debemos plantear la regla de tres simple de la siguiente manera:

1 década equivale a 10 años; A cuantas decadas equivalen 160.000 años?

1 década→10 años

x ←160.000 años

Debemos multiplicar 160.000 por 1 y luego dividir entre 10 ;

x=( $\frac{160.000x1}{10}$ )=16.000 décadas; en notación científica sería 16x10^3.

Respuesta: 160.000 años corresponde a 16.000 décadas.

5 0

3 years ago