Fill in the Blanks

Which of the following would notbe taken into consideration when describing the quality of a sound? A.The frequency of the overt

Natalija [7]

<span>the one that should be taken as consideration when describing the quality of a sound is: D.The number of the overtones in the sound Too many overtones indicated that there is too many unrelated sound that make a lot of the sound's part became redundant and unecessary</span>

6 0

3 years ago

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A capacitor is connected across an AC source. Suppose the frequency of the source is doubled. What happens to the capacitive rea

Slav-nsk [51]

Answer:

the capacitive reactance is reduced by a factor 2

Explanation:

The capacitive reactance is given by:

$X_C = \frac{1}{2\pi f C}$

where

f is the frequency of the source

C is the capacitance

In this case, the frequency of the source is doubled:

f' = 2f

while the capacitance does not change. So the new capacitive reactance will be

$X_C' = \frac{1}{2\pi f' C}=\frac{1}{2\pi (2f)C}=\frac{1}{2}X_C$

so the capacitive reactance is reduced by a factor 2.

5 0

3 years ago

Think about how geothermal energy is captured and used. Explain how geothermal energy shows the flow of thermal energy from hot

kumpel [21]

Answer:

People can capture geothermal energy through: Geothermal power plants, which use heat from deep inside the Earth to generate steam to make electricity. Geothermal heat pumps, which tap into heat close to the Earth's surface to heat water or provide heat for buildings

When the weather is cold, the water or refrigerant heats up as it travels through the part of the loop that's buried underground. Once it gets back above ground, the warmed water or refrigerant transfers heat into the building. The water or refrigerant cools down after its heat is transferred.

8 0

3 years ago

7. Una locomotora de 80.000 kilogramos de masa, parte del reposo y a los 10 segundos lleva una velocidad de 36Km/h. Halla: A. La

Tasya [4]

Answer:

a) La aceleración del movimiento es 1 metros por segundo al cuadrado, b) La fuerza que causa el movimiento es 80.000 newtons.

Explanation:

a) Supóngase que la locomotora acelera uniformemente, la aceleración se está descrita por la siguiente ecuación cinemática:

$v = v_{o}+a\cdot t$

Donde:

$v_{o}$ - Rapidez inicial, medida en metros por segundo.

$v$ - Rapidez final, medida en metros por segundo.

$a$ - Aceleración, medida en metros por segundo al cuadrado.

$t$ - Tiempo, medido en segundos.

Se despeja la aceleración:

$a = \frac{v-v_{o}}{t}$

Si $v_{o} = 0\,\frac{m}{s}$ , $v = 10\,\frac{m}{s}$ y $t = 10\,s$ , la aceleración del movimiento es:

$a = \frac{10\,\frac{m}{s}-0\,\frac{m}{s}}{10\,s}$

$a = 1\,\frac{m}{s^{2}}$

La aceleración del movimiento es 1 metros por segundo al cuadrado.

b) Dado que una locomotora es un sistema de masa constante, la fuerza ( $F$ ) que genera el movimiento es igual a:

$F = m\cdot a$

Donde:

$m$ - Masa, medida en kilogramos.

$a$ - Aceleración, medida en metros por segundo al cuadrado.

Dados que $m = 80.000\,kg$ y $a = 1\,\frac{m}{s^{2}}$ , la fuerza que causa el movimiento es:

$F = (80.000\,kg)\cdot \left(1\,\frac{m}{s^{2}} \right)$

$F = 80.000\,N$

La fuerza que causa el movimiento es 80.000 newtons.

8 0

3 years ago

At an amusemlec 27 collisions and powerent park, a 96.0 kg car moving with a speed v bounces elastically off a 135-kg bumper car

kap26 [50]

By conservation of momentum :

$m_1u_1 + m_2u_2 = m_1v_1 + m_2v_2\\\\96v + 0 = 96v_1 + 135\times 1.03\\\\96v = 96v_1 +139.05 \ \ \ \ \ \ .....1$

By conservation of energy :

$\dfrac{m_1u_1^2}{2}+\dfrac{m_1u_2^2}{2} =\dfrac{m_2v_1^2}{2} +\dfrac{m_2v_2^2}{2}\\\\96v^2 + 0 = 96v_1^2 + 135(1.03)^2\\\\96v^2 = 96v_1^2 +143.22 \ \ \ \ \ ....2)$

Solving equation 1 and 2, we get :

v = 1.23 m/s

Therefore, the initial speed of 96 kg car is 1.23 m/s .

4 0

3 years ago