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3 years ago

6) What force should be applied to compress a spring

Physics

1 answer:

valina [46]3 years ago

7 0

Answer:

26.6N

Explanation:

Using Hooke’s law

F = kx

Where F = force

K = spring constant

x = displacement

From the question

F= ?

K = 140 N/m

x = 0.19m

Therefore,

F = 140 x 0.19

= 26.6N

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When a particular hanging mass is suspended from the string, a standing wave with two segments is formed. When the weight is red

ahrayia [7]

Solution :

Mass is varied keeping frequency constant.

Wavelength, λ $=\frac{2l}{n}$

where length of spring = l

number of segments = n

Velocity, v = λ x f

= $\sqrt{\frac{T}{\mu}}$

$\mu$ = mass density, T = tension in string

$T=\frac{4 \mu l^2f^2}{n^2}$

$T=mg = \frac{4 \mu l^2f^2}{n^2}$ , n = 2

$T = (m-2.2)g = \frac{4 \mu l^2f^2}{n^2}, n = 5$

$\Rightarrow \frac{m}{m-2.2}=\frac{25}{4}$

$\Rightarrow m = 2.619\ kg$

Therefore, μ = 0.002785 kg/ m

Frequency is varied keeping T constant

$T=\frac{4 \mu l^2f^2}{n^2}, f=60 , \ \ n = 2$

$T=\frac{4 \mu l^2f^2}{n^2}, f=? , \ \ n = 7$

$\Rightarrow \frac{60^2}{4}=\frac{f^2}{49}$

f = 210 Hz

8 0

3 years ago

→ 7Ti2(SO4)3 Which number represents a coefficient? 2 3 4 7

Firdavs [7]

The answer is 7. A coefficient is a number paired with a variable. Because T is paired with 7, it is therefore the coefficient.

6 0

3 years ago

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El tubo de entrada que suministra presión de aire para operar un gato hidráulico tiene 2 cm de diámetro. El pistón de salida es

Bess [88]

Answer:

La presión neumática para levantar un automóvil de 17,640 newtons es 220,500 pascales.

Explanation:

Asumiendo que la presión ( $P$ ), medida en pascales, tiene una distribución uniforme sobre la superficie del pistón, se calcula a partir de la siguiente expresion:

$P = \frac{F}{A}$

Donde:

$F$ - Fuerza motriz, medida en newtons.

$A$ - Área del pistón, medida en metros cuadrados.

La fuerza motriz es equivalente al peso del automóvil. El área del pistón ( $A$ ), medido en metros cuadrados, es determinado por:

$A=\frac{\pi}{4}\cdot D^{2}$

Donde $D$ es el diámetro del pistón, medido en metros.

Si $D = 0.32\,m$ y $F =17,640\,N$ , entonces la presión neumática es:

$A = \frac{\pi}{4}\cdot (0.32\,m)^{2}$

$A \approx 0.080\,m^{2}$

$P = \frac{17,640\,N}{0.080\,m^{2}}$

$P = 220,500\,Pa$

La presión neumática para levantar un automóvil de 17,640 newtons es 220,500 pascales.

8 0

3 years ago

Calculate δe, if the system absorbs 7.24 kj of heat from the surroundings while its volume remains constant (assume that only p−

butalik [34]

I believe the answer is 7.24 kJ.
From the equation ΔE = dW + dQ; where W is the work done on/by the system and Q is the heat the system absorbs/loses.
Therefore; ΔE = 72.4 kJ since the system has bot done any p-v work (dV= zero) and has absorbed heat.

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3 years ago

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Is a spectral line with wavelength 656.5 nm seen in the absorption spectrum of hydrogen atoms?

Karo-lina-s [1.5K]

Yes. Since the wavelength of the red line in the Hydrogen spectrum is 656.5 nanometer. This confirms the possibility of seeing the spectral line with the same wavelength in the absorption spectrum of hydrogen atoms. The Hydrogen spectrum has the lower limit of 656.5 nm which still includes 656.5 nm in the range.

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3 years ago