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Physics

1 answer:

postnew [5]2 years ago

5 0

Explanation:

TEMPLE HINDUS MOSQUE MUSLIMS TEMPLE HINDUS MOSQUE MUSLIMS

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Why would a atomic nucleus give off a particle

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<span>A atomic nucleus would give off a particle to become stable.

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A particular conductor has 3.0 × 10^27 mobile electrons per cubic meter. The material is in the shape of a cylinder of length 6.

irina1246 [14]

Answer:

Explanation:

Given

Length of cylinder $L=6 cm$

diameter of cylinder $d=1 cm$

Area of cross-section $A=\frac{\pi\times d^2}{4}$

$A=\frac{\pi \times 10^{-4}}{4}=7.855\times 10^{-5} m^2$

$Emf =2.5 V$

current $I=5 mA$

$Resistance=\frac{V}{I}=\frac{2.5}{5\times 10^{-3}}$

$R=500 \Omega$

R is also given by

$R=\rho \frac{L}{A}$

where $\rho =resistivity$

$\rho =\frac{RA}{L}=\frac{500\times 7.85\times 10^{-3}}{6}$

$\rho =0.654 \Omega -m$

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A 102.1 kg cannon at rest contains a 9.8 kg cannon ball. When fired, the cannon ball leaves the cannon with a speed of 88.03 m/s

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Answer:

8.45m/s = recoil speed

Explanation:

Momentum = mass • velocity

9.8kg • 88.03m/s = 102.1kg • recoil speed

862.694kg•m/s = 102.1kg • recoil speed

divide both sides by 102.1kg

8.45m/s = recoil speed

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Two trains, each having a speed of s, are headed at each other on the same straight track. A bird that can fly at speed 2s flies

juin [17]

Answer:

The total distance the bird travels is d.

Explanation:

Each train travels at the speed s. They will meet at the center, a distance d/2 (which is where the bird might be crushed). Each train travels the same distance d/2 in a time t which is also equal for both. This is also the time the bird spends travelling between them.

For any of the train, the time t is the distance divided by the speed.

$t = \dfrac{d/2}{s} = \dfrac{d}{2s}$

The bird travels at the speed of 2s. Its distance is given by the product of its speed and the time taken.

$d_\text{Bird} = \dfrac{d}{2s}\times 2s = d$

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What can cause matter to change from one state to another?

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The answer is Both A and B

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