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4vir4ik [10]
3 years ago
6

When air is heated it expands and ________. when air is heated it expands and ________. contracts burns lowers its pressure sink

s explodes?
Physics
1 answer:
Svetradugi [14.3K]3 years ago
8 0
<span>When air is heated it expands and sinks. 

When air is heated it expands and becomes lighter and then it rises, but the cold air from the surrounding rushes in to fill the gap. It cools the hot air and then it becomes denser and heavier, so it eventually sinks down. </span>
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A double-slit diffraction pattern is formed on a distant screen. If the separation between the slits decreases, what happens to
STALIN [3.7K]

Answer:

The distance between interference fringes increases.

Explanation:

In a double-slit diffraction pattern, the distance of the n-order fringe from the centre of the pattern is

y=\frac{n \lambda D}{d}

where \lambda is the wavelength of the light, D the distance of the screen, and d the separation between the slits.

If we take two adjacent fringes, n and (n+1), their distance is

\Delta y = \frac{(n+1)\lambda D}{d}-\frac{n\lambda D}{d}=\frac{\lambda D}{d}

so, we see that it is inversely proportional to the slit separation, d.

Therefore, if the separation between the slits decreases, the distance between the interference fringes increases.

6 0
3 years ago
Three grams of Bismuth-218 decay to 0.375 grams in one hour. What is the half-life
alina1380 [7]

Explanation:

Use half life equation:

A = A₀ (½)^(t / T)

where A is the final amount,

A₀ is the initial amount,

t is time,

and T is half life.

0.375 = 3 (½)^(1 / T)

0.125 = (½)^(1 / T)

(½)^3 = (½)^(1 / T)

3 = 1 / T

T = 1/3 hours

T = 20 minutes

6 0
3 years ago
A 10 kg plank 3 meters in length extends off the edge of a pirate ship so that only 0.5 m remains on the deck. This is held in p
labwork [276]

Answer:

sorry I've never took in this class before I will not be able to help you

3 0
4 years ago
What separates the terrestrial planets from the jovian or gas planets in space?
Flura [38]
In our solar system, terrestrial planets are separated from the gas giants by the asteroid belt. The asteroid belt is a region in the solar system between Mars and Jupiter where asteroids are located. Gas giants do not have a solid surface and possible a small rocky core. The gas giants are Jupiter, Saturn, Uranus and Neptune. The first four planets, Mercury, Venus, Earth and Mars.  
8 0
3 years ago
A two-turn circular wire loop of radius 0.63 m lies in a plane perpendicular to a uniform magnetic field of magnitude 0.219 T. I
Basile [38]

Answer:

The magnitude of the average induced emf in the wire during this time is 9.533 V.

Explanation:

Given that,

Radius r= 0.63 m

Magnetic field B= 0.219 T

Time t= 0.0572 s

We need to calculate the average induce emf in the wire during this time

Using formula of induce emf

E=-\dfrac{d\phi}{dt}

E=-B\dfrac{dA}{dt}

E=-B\dfrac{A_{2}-A_{1}}{dt}

E=B\dfrac{A_{1}-A_{2}}{dt}.....(I)

In reshaping of wire, circumstance must remain same.

We calculate the length when wire is in two loops

l=2\times 2\pi\times r_{1}

l=2\times 2\pi\times 0.63

l=7.916\ m

The length when wire is in one loop

l=2\pi\times r_{2}

7.916=2\times \pi\times r_{2}

r_{2}=\dfrac{7.916}{2\times \pi}

r_{2}=1.259\ m

We need to calculate the initial area

A_{1}=N\times\pi\times r_{1}^2

Put the value into the formula

A_{1}=2\times3.14\times(0.63)^2

A_{1}=2.49\ m^2

The final area is

A_{2}=N\times\pi\times r_{2}^2

A_{2}=1\times\pi\times(1.259)^2

A_{2}=4.98\ m^2

Put the value of initial area and final area in the equation (I)

E=0.219\dfrac{2.49-4.98}{0.0572}

E=-9.533\ V

Negative sign shows the direction of induced emf.

Hence, The magnitude of the average induced emf in the wire during this time is 9.533 V.

6 0
3 years ago
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