3 years ago

#1- How much Magnesium is consumed in this reaction? *input # only.

Physics

1 answer:

____ [38]3 years ago

4 0

Answer:

use the mole concept

Explanation:

the mole to mole ratio

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What is the most effective means of establishing awareness of hazards in commercial, industrial, and storage facilities with lar

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C: Contacting the facilities.

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3 years ago

A student slides down a slide at recess. After getting off the slide he goes to cross the monkey bars. As he touches the metal o

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3 years ago

There is evidence that elephants communicate via infrasound, generating rumbling vocalizations as low as 14 Hz that can travel u

amid [387]

Answer:

$L = 96.2 dB$

Explanation:

As we know that the level of intensity is given as

$\beta = 10Log(\frac{I}{I_o})$

here we know

$\beta = 104 dB$

$104 = 10Log(\frac{I}{10^{-12}})$

$I = 0.025 W/m^2$

now the sound is travelling in all possible directions so we have

$\frac{I_1}{I_2} = \frac{r_2^2}{r_1^2}$

$\frac{0.025}{I_2} = \frac{10^2}{4.1^2}$

$I_2 = 4.2 \times 10^{-3} W/m^2$

now for level of sound we have

$L = 10Log(\frac{4.2 \times 10^{-3}}{10^{-12}})$

$L = 96.2 dB$

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3 years ago

Define principal focus of concave mirror.Where should we place a candle in front of a concave mirror to get an enlarged,erect im

Mars2501 [29]

Answer

The image formed by a concave mirror will be virtual, erect and magnified when the object is placed only between the pole and the principal focus of the mirror.

Hope it helped u if yes mark me brainliest!

Tysm!

3 0

4 years ago

Which object has the most thermal energy?

Valentin [98]

Answer:

Explanation:

The object with the most thermal energy is the choice B. This is because from the given choices, it has the most mass and highest temperature of all the bricks.

Thermal energy is the sum total of the average kinetic energy within the system.

It is mathematically expressed as:

Quantity of energy = mass x specific heat x change in temperature

We see that the quantity of the thermal energy is directly proportional to mass and temperature changes.

3 0

3 years ago