How does fresh water enter the ocean

PLEASE HELP ASAP!! CORRECT ANSWER ONLY PLEASE!!

Lunna [17]

I think the answer is x axis

6 0

4 years ago

A piano wire with mass 3.00 g and length 80.0 cm is stretched with a tension of 25.0 N. A wave with frequency 120.0 Hz and ampli

lys-0071 [83]

Answer:

(a) $P_{avg}$ = 0.22 W

(b) $P_{avg,2}$ = 0.056 W

Explanation:

given information:

the mass of piano wire, m = 3.00 g = 0.003 kg

tension, F = 25 N

length, l = 80 cm = 0.8 m

frequency, f = 120 Hz

amplitude, A = 1.6 mm = 0.0016 m

(a) the average power carried by the wave, $P_{avg}$

$P_{avg}$ = $\frac{1}{2}$ (√μF)ω²A²

where,

ω = 2πf = 2π120 = 754 $s^{-1}$

μ = $\frac{m}{l}$

= $\frac{0.003}{0.8}$

= 0.00375 kg/m

thus,

$P_{avg}$ = $\frac{1}{2}$ (√(0.00375)(25))(754)²(0.0016)²

$P_{avg}$ = 0.22 W

(b) What happens to the average power if the wave amplitude is halved.

based on the equation above, we know that the average power is proportional to the square amplitude. therefore

$\frac{P_{avg,1} }{P_{avg,2} } = \frac{A_{1} ^{2} }{A_{2} ^{2} } }$

$\frac{P_{avg,1} }{P_{avg,2} } = \frac{A_{1} ^{2} }{(0.5A_{1} )^{2} } }$

$P_{avg,2}$ = $\frac{0.22}{4}$

$P_{avg,2}$ = 0.056 W

4 0

3 years ago

Circle the path function(s) which are affected by a detailed path from one state to another: (A) Temperature (B) Boundary work (

Naddika [18.5K]

Answer:

(B) Boundary work

(D) Heat

Explanation:

Boundary work and heat quantitatively describe the transition between equilibrium states of thermodynamic systems. They are not only a function of the initial and final states, but also of the successive intermediate states through which the system passes, this is, depend on the path taken to reach one state from another. Thus, are path functions.

4 0

3 years ago

Air at 20ºC with a convection heat transfer coefficient of 20 W/m2·K blows over a pond. The surface temperature of the pond is 2

dimulka [17.4K]

Answer:

The heat flux between the surface of the pond and the surrounding air is<em> 60 W/</em> $m^{2}$ <em> </em>

Explanation:

Heat flux is the rate at which heat energy moves across a surface, it is the heat transferred per unit area of the surface. This can be calculated using the expression in equation 1;

q = Q/A ...............................1

since we are working with the convectional heat transfer coefficient equation 1 become;

q = h ( $T_{sf} -T_{sd}$ ) ........................2