3 years ago

What term is used to describe the hot ash, gases, and materials being erupted at speeds of up to 400 mph?

1 answer:

fomenos3 years ago

7 0

The word 'magma' is used to refer to the hot ash, gases and material expelled by a volcano during an eruption. To be more precise, when all these materials reach the ground, the word 'lava' is also used.

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Why is hip-hop & Zumba dance exercises so popular? does dancing make you a better person?

Studentka2010 [4]

Answer:

not realy

Explanation:

dancing is a way of exercise and liking a song or you're just happy etc.

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2 years ago

You drop an ice cube into an insulated flask full of water and wait for the ice cube to completely melt. The ice cube initially

3241004551 [841]

Answer: $T=12.69^{\circ}C$

Explanation:

Given

Mass of ice $m=60 gm$

mass of water $M=760 gm$

Initial Temperature of water $T_i=20^{\circ}C$

Let T be the Final Temperature of mixture

Latent heat of Fusion $L=334 J/gm$

heat required to melt ice completely is

$Q_1=60\times 334=20.04 kJ$

Heat released by water is taken by ice thus

$Mc_{water}(20-T)=mL+mc_{water}(T-0)$

$0.76\times 4.184\cdot (20-T)=20.04+0.06\times 4.184\cdot (T)$

$T=12.69^{\circ}C$

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2 years ago

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2 years ago

which equations represent the relationship between wavelength and frequency for a sound wave? check all that apply

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2 years ago

the half-life of carbon-14 is 5,730 years. After 11,460 year, how much of original carbon-14 remains?

Inessa [10]

Via the half-life equation:

$A_{final}=A_{initial}(\frac{1}{2})^{\frac{t}{h}}$

Where the time elapse is 11,460 year and the half-life is 5,730 years.

$A_{final}=A_{initial}(\frac{1}{2})^\frac{11460}{5730} \\\\A_{final}=A_{initial}\frac{1}{4} \\\\A_{final}=\frac{1}{4}A_{initial}$

Therefore after 11,460 years the amount of carbon-14 is one fourth (1/4) of the original amount.

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2 years ago