4 years ago

Interference is the ___________ of two or more waves.

Physics

2 answers:

Leokris [45]4 years ago

3 0

Explanation:

its the 1 one

Zina [86]4 years ago

3 0

Answer:superimposition.

Explanation:it occurs when two or more waves pass through one another.

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a loaded sack of total mass is 1000 gramme falls down from the floor of a lorry 200cm high, calculate the workdone by the gravit

Helen [10]

Answer:

W = 20 J

Explanation:

Given that,

The mass of a loaded sack, m = 1000 g = 1 kg

It falls down from the floor of a lorry 200 cm high, h = 2 m

We need to find the work done by the gravity. The work done by an object under the action of gravity is given by :

W = mgh

Substitute all the values,

W = 1 × 10 × 2

= 20 J

Hence, the required work done by gravity is equal to 20 J.

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3 years ago

The number of kilograms of water in a human body varies directly as the mass of the body. Upper AA 9393-kg person contains 6262

Pie

Answer:

54 kg

Explanation:

Mass of person = 93 kg = $m_p$

Mass of water = 62 kg = $m_w$

Dividing the above two masses we get

$\frac{m_p}{m_w}=\frac{93}{62}\\\Rightarrow \frac{m_p}{m_w}=1.5\\\Rightarrow m_p=1.5m_w$

Hence, the mass of the person is 1.5 times the mass of the water in them

Now, Mass of person = 81 kg = $m_p$

$m_p=1.5m_w\\\Rightarrow m_w=\frac{1}{1.5} m_p\\\Rightarrow m_w=\frac{1}{1.5} \times 81\\\Rightarrow m_w=54\ kg$

So, the mass of water in a person that has mass of 81 kg is 54 kg

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How to make a force field for your house

Lelu [443]

That is not yet possible. that technology has not yet been invented.

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Which statement is always true about objects which exert gravitational force on each other? (3 points)

kumpel [21]

Answer:

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Its called evaporation so its B

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