So, I believe an <em>isobar</em> connects areas of the same atmospheric pressure, and an <em>isotherm</em> connects areas of the same temperature. Hope this helped :)

8 0

3 years ago

A nonmechanical water meter could utilize the Hall effect by applying a magnetic field across a metal pipe and measuring the Hal

Serga [27]

Answer:

The velocity is $v =2.455 \ m/s$

Explanation:

From the question we are told that

The diameter of the pipe is $d = 4.25 \ cm = 0.0425 \ m$

The magnetic field is $B = 0.575 \ T$

The hall voltage is $V_H = 60.0 mV = 60 *10^{-3} \ V$

Generally the average fluid velocity is mathematically represented as

$v = \frac{V}{ B * d }$

=> $v = \frac{60*10^{-3}}{ 0.575 * 0.0425 }$

=> $v =2.455 \ m/s$

5 0

3 years ago

An object has 4J of kinetic energy and 16J of potential energy. How much mechanical energy does it have?

Ostrovityanka [42]

Answer: C. 20J

Explanation: im pretty sure sorry if im wrong :(

7 0

3 years ago

For a home sound system, two small speakers are located so that one is 52 cm closer to the listener than the other. For what val

Veseljchak [2.6K]

We want a sound wave with a wavelength of 0.52 meters or a natural fraction thereof. We'll work in MKS.

w = 0.52/n

That's length. We have speed 344 meters/second so w corresponds to a frequency of

f = 344 / w = n (344/.52)

f = 661.5 n Hertz

I don't really agree with how they're saying it, but all the fundamental talk is probably trying to tell us n=1,

Answer: 661.5 Hertz

Any multiple of that will also produce constructive interference; we can go to about n=30 before we're out of the audio range.

7 0

3 years ago