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3 years ago

What two statements are true about energy transformations

Physics

1 answer:

Arisa [49]3 years ago

4 0

Answer:

First statement:

Energy can neither be created nor destroyed.

Second statement:

Energy can be converted from one form to another.

Explanation:

According to the law of conservation of energy:energy can neither be created nor destroyed but can be converted from one form to another

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The sixth harmonic of a 70 cm long guitar string has a frequency of 557.14 Hz. What is the velocity of sound in the guitar strin

Crazy boy [7]

Answer:

The velocity of sound in the guitar string = 129.99 m/s

Explanation:

Harmonics: A harmonic is a note with frequency equal to an integral multiple of that of the fundamental frequency.

Note: The harmonics of a string is the same as the harmonics of an open pipe.

f₆ = 3v/l ............................ Equation 1

making v the subject of the equation,

v = f₆l/3 ......................... Equation 2

Where f₆ = Is the sixth harmonics of the the string, v = velocity of sound in the guitar string, l = length of the guitar string.

Given: f₆ = 557.14 Hz, l = 70 cm = 0.7 m.

Substituting into equation 2

v = (557.14×0.7)/3

v = 129.99 m/s

Thus the velocity of sound in the guitar string = 129.99 m/s

7 0

3 years ago

. When using straight ladders, the base of the ladder should be _____ away from the wall or other vertical surface for every ___

guapka [62]

one foot; four feet is the answer

3 0

3 years ago

Read 2 more answers

Be sure to answer all parts. Assume the diameter of a neutral helium atom is 1.40 × 102 pm. Suppose that we could line up helium

ss7ja [257]

Answer:

The number of atoms are $1.86\times10^{8}$ .

Explanation:

Given that,

Diameter $D = 1.40\times10^{2}\ pm$

$D=1.40\times10^{2}\times10^{-12}\ m$

Distance = 2.60 cm

We calculate the number of atoms

Using formula of numbers of atoms

$Number\ of\ atoms =\dfrac{2.60\times10^{-2}}{1.40\times10^{2}\times10^{-12}}$

$Number\of\atoms =1.86\times10^{8}$

Hence, The number of atoms are $1.86\times10^{8}$ .

8 0

3 years ago

Hermal energy is a form of... A. Potential energy. B. Kinetic energy. C. Chemical energy.

aev [14]

Thermal energy also known as 'heat energy' is a form of kinetic energy.

6 0

3 years ago

Scientists are able to use body waves to determine what makes up the different layers of the Earth's interior. What characterist

k0ka [10]

Answer:

P-waves travel through liquids and solid while S-waves only travel through solids.

Explanation:

Scientists are able to use the fact that P-waves travel through both solids and liquids and waves travel through only solids to determine what makes the different layers of the Earth.

5 0

2 years ago