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Andrew [12]
2 years ago
7

It is known as a basic unit of all living things.

Physics
1 answer:
andrezito [222]2 years ago
4 0

hello, the answer is..

cell

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The musical tone a piano has a frequency of 346HZ and a wavelength of 1.3 M what is the speed of the sound
prohojiy [21]

Answer:

v= 449.8 m/s

Explanation:

Given data

Frequency=  346Hz

Wave length= 1.4m

The expression below is used to find the speed

v= f \lambda\\\\

substitute

v= 346*1.3\\\\v= 449.8 m/s

Hence the speed is v= 449.8 m/s

5 0
3 years ago
On your first day at work as an electrical technician, you are asked to determine the resistance per meter of a long piece of wi
Lostsunrise [7]

Answer:

0.06\Omega/m

Explanation:

Firstly, when you measure the voltage across the battery, you get the emf,

E = 13.0 V

In order to proceed we have to assume that the voltmeter offers no loading effect, which is a valid assumption since it has a very high resistance.

Secondly, the wires must be uniform. So the resistance per unit length is constant (say z). Now, even though the ammeter has very little resistance it cannot be ignored as it must be of comparable value/magnitude when compared to the wires. This is can seen in the two cases when currents were measured. Following Ohm's law and the resistance of a length of wire being proportional to it's length, we should have gotten half the current when measuring with the 40 m wire with respect to the 20 m wire (I=\frac{V}{R}). But this is not the case.

Let the resistance of the ammeter be r

Hence, using Ohm's law we get the following 2 equations:

\frac{13}{20z+r} =7.6   .......(1)

\frac{13}{40z+r} =4.5     ......(2)

Substituting the value of r from (2) in (1), we have,

13=152z+7.6\times\frac{13-180z}{4.5}

which simplifying gives us, z=0.0589\Omega/m\approx0.06\Omega/m (which is our required solution)

putting the value of z in either (1) or (2) gives us, r = 0.5325 \Omega

3 0
2 years ago
6. A woman weighs 650 N and wears high heels with a
Anna [14]

Answer:

12.5

Explanation:

Pressure: Force/Area = 650/52

=12.5

6 0
3 years ago
At what minimum speed must a roller coaster be traveling when upside down at the top of a circle so that the passengers do not f
Basile [38]
Jjjjbhubhhbvfvgvgvggb. v vvbbhhhhb
7 0
3 years ago
Which of the following is true?
shusha [124]

Answer:

C.

The Earth and Moon both exert a gravitational force on each other.

Explanation: just did it booom

4 0
3 years ago
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