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3 years ago

11

If 20 beats are produce with one second which of the following frequency could possibly be held by two sound waves traveling thr

ough a medium a long a common path at the same time

1 answer:

musickatia [10]3 years ago

8 0

ANY two frequencies whose difference is 20 Hz.

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Which energy transformations occur when a candle burns

gayaneshka [121]

The heat from the wick melts the wax which gets absorbed in the wick and then gets burnt (which is really oxidation) to produce heat energy<span> as well as light </span>energy. The energy<span> transforms from chemical </span>energy<span> to heat and light </span>energy<span>. Because when the </span>candle burns<span> a chemical reaction </span>occurs<span>, and produces heat and light.

</span>

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3 years ago

Read 2 more answers

goldfiish [28.3K]

Answer:

b

Explanation:

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3 years ago

A 16000 kg railroad car travels along on a level frictionless track with a constant speed of 23.0 m/s. A 5400 kg additional load

Alisiya [41]

Answer:

The speed of the car when load is dropped in it is 17.19 m/s.

Explanation:

It is given that,

Mass of the railroad car, m₁ = 16000 kg

Speed of the railroad car, v₁ = 23 m/s

Mass of additional load, m₂ = 5400 kg

The additional load is dropped onto the car. Let v will be its speed. On applying the conservation of momentum as :

$m_1v_1=(m_1+m_2)v$

$v=\dfrac{m_1v_1}{m_1+m_2}$

$v=\dfrac{16000\ kg\times 23\ m/s}{(16000+5400)\ kg}$

v = 17.19 m/s

So, the speed of the car when load is dropped in it is 17.19 m/s. Hence, this is the required solution.

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3 years ago

Can someone help me out??? I need this done ASAP TYSM!!

Reil [10]

Answer:

Answer is D

Explanation:

By changing the direction of the current moving through the wire will change polarity of the magnet but it will not affect the strength of the magnet.

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3 years ago

When particles spread out due to an increase of thermal energy this is called?

Lelechka [254]

This sounds like thermal expansion.

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