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4 years ago

Define the following terms:

1 answer:

6 0

Chemical Energy is energy stored in the bonds of chemicalcompounds (atoms and molecules). It is released in achemical reaction, often producing heat as a by-product (exothermic reaction). Batteries, biomass, petroleum, natural gas, and coal are examples of stored chemical energy.

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Two sources of in-phase coherent sound are located at the points (0 m, 2 m) and (-2 m, 0 m). An observer at the origin hears con

Korolek [52]

Answer:

c) 335 Hz

Explanation:

Given that the two sources:

S₁ ≡ (0 m, 2 m)

S₂ ≡ (-2 m, 0 m)

The lady hears the destructive interference for the first time when she reaches the point (0.6 m, 0 m).

So, the path difference = Δx = |S₂P - S₁P|

$S_2P=\sqrt {(-2-0.6)^2+(0-0)^2}=2.6\ m$

$S_1P=\sqrt {(0-0.6)^2+(2-0)^2}=2.0881\ m$

So,

Δx = |2.6 - 2.0881| = 0.5119 m

For, first destructive interference, Δx = λ / 2

So,

Wavelength = 1.0238 m

Also,

c = ν×λ

Where,

c is the speed of sound wave having value as 346 m/s

ν is the frequency

λ is the wavelength

So,

ν = c / λ = 346 m/s / 1.0238 m ≈ 335 Hz

3 0

3 years ago

Which fact is true during a fission chain reaction?

Free_Kalibri [48]

Answer:

The number of freely-moving neutrons decreases over time.

Explanation:

8 0

3 years ago

An air balloon is moving upward at a constant speed of 3 m/s. Suddenly a passenger realizes that she left her camera on the grou

frosja888 [35]

Answer:t=0.3253 s

Explanation:

Given

speed of balloon is $u=3\ m/s$

speed of camera $u_1=20\ m/s$

Initial separation between camera and balloon is $d_o=5\ m$

Suppose after t sec of throw camera reach balloon then,

distance travel by balloon is

$s=ut$

$s=3\times t$

and distance travel by camera to reach balloon is

$s_1=ut+\frac{1}{2}at^2$

$s_1=20\times t-\frac{1}{2}gt^2$

Now

$\Rightarrow s_1=5+s$

$\Rightarrow 20\times t-\frac{1}{2}gt^2 =5+3t$

$\Rightarrow 5t^2-17t+5=0$

$\Rightarrow t=\dfrac{17\pm \sqrt{17^2-4(5)(5)}}{2\times 5}$

$\Rightarrow t=\dfrac{17\pm 13.747}{10}$

$\Rightarrow t=0.3253\ s\ \text{and}\ t=3.07\ s$

There are two times when camera reaches the same level as balloon and the smaller time is associated with with the first one .

(b)When passenger catches the camera time is $t=0.3253\ s$

velocity is given by

$v=u+at$

$v=20-10\times 0.3253$

$v=16.747\ m/s$

and position of camera is same as of balloon so

Position is $=5+3\times 0.3253$

$=5.975\approx 6\ m$

8 0

3 years ago

Do all metals stick to magnets? Give an example. I NEED HELP FASTT

ludmilkaskok [199]

Answer:

Explanation:

Not all metals stick to magnets. Like aluminum. if you were to stick a magnet on to an aluminum it would fall off.

6 0

3 years ago

What is sir Richard Branson's personal dilemma ?

kakasveta [241]

Answer:

Sir Richard Branson's personal dilemma is that he is concerned about the environment and climate change, but he has made his fortune with an airline industry that contributes to the greenhouse gases.

brainliest plz

4 0

3 years ago