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3 years ago

As a piece of paper burns, its physical properties change. So why is paper's ability to bum

Physics

1 answer:

sleet_krkn [62]3 years ago

4 0

Because it changes what the substance is and creates a new substance.

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Which describes why the sun is a renewable resource? The sun creates biomass. The sun is continuously releasing energy. The sun

Fynjy0 [20]

Renewable source means that it can never run out or run out in a long time. In this case the sun is expected to shine for about five billion years because of the high amount of hydrogen that is stored in its core. So the answer should be "The sun is continuously releasing energy". This answer is the best because there are many other renewable resources on earth that can cause pollution.

6 0

3 years ago

3. What is the temperature if a 545-Hz sound wave has a wavelength of 0.651 m

KATRIN_1 [288]

Answer:

19.33°C

Explanation:

To find the value of T you use the following formula:

$v=343+0.61T$

v: speed of sound

To calculate v you use:

$v=\lambda f$

λ: wavelength = 0.651m

f: = 545Hz

by replacing :

$v=(0.651m)(545s^{-1})=354.79m/s$

Finally, by replacing in the first formula you obtain:

$354.79=343+0.61T\\\\T=19.33\°C$

T = 19.33°C

7 0

3 years ago

A 100-kg astronaut is floating in outer space. If the astronaut throws a 2-kilogram wrench at a speed of 10 meters per second, w

sergey [27]

Since Astronaut and wrench system is isolated in the space and there is no external force on it

So here momentum of the system will remain conserved

so here we can say

$m_1v_{1i} + m_2v_{2i} = m_1v_{1f} + m_2v_{2f}$

initially both are at rest

so here plug in all values

$0 = 100 v_{1f} + 2\times 10$

$v_{1f} = -0.20 m/s$

so here the astronaut will move in opposite direction and its speed will be equal to 0.20 m/s

3 0

3 years ago

Making payments to a victim in order to repay them for losses they incurred during or as a result of the crime is called

FrozenT [24]

<span>the answer is victim restitution</span>

3 0

3 years ago

Properties of convex mirror

Ahat [919]

Answer:

The image result of an object reflected by a convex mirror is typically virtual, upright, and smaller. Discover how moving the object farther away from the mirror's surface affects the size of the virtual image formed behind the mirror

Explanation:

6 0

4 years ago