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3 years ago

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A motor is used to pump water from a depth of 5m to fill a volume of 10cubic meter in 5 min . If 50 percent of the power is wast

ed , What is the power of the motor?

1 answer:

JulijaS [17]3 years ago

4 0

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The Balmer series in hydrogen atom produces only infrared emission. O True O False

lorasvet [3.4K]

Answer:

False

Explanation:

As we know that, the Balmer series gives the n values as,

$n_{i}=2$ .

$[tex]n_{f}=3,4,5,.....\infty$ .

Now the value of wavelength can be calculated as,

$\frac{1}{\lambda}=R(\frac{1}{n_{i} }-\frac{1}{n_{f} } )z^{2}$ .

Here, $R=109677 cm^{-1}$ .

And $n_{f}=3$ .

Now,

$\frac{1}{\lambda}=109677 cm^{-1}(\frac{1}{2}-\frac{1}{3})$ .

Therefore,

$\lambda=\frac{6}{109677} cm\\\lambda=547\times 10^{-9} m\\ \lambda=547 nm$

Therefore, the wavelength of Balmer series lies in visible region which is 547 nm.

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3 years ago

Read 2 more answers

What is glucose made of

tigry1 [53]

Glucose is a simple sugar.

Its chemical formula is C₆ H₁₂ O₆ .

That tells you that every glucose molecule is made of 6 atoms of carbon,
12 atoms of hydrogen, and 6 atoms of oxygen.

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4 years ago

If two objects are the same size, will they have the same mass?

jeka57 [31]

No because they could be different materials for example one could be concrete and one could be aluminium

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3 years ago

How is biomass energy better than geothermal energy

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If you search that click the first link ;)

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3 years ago

What tension would you need to make a middle c (261.6 hz) fundamental mode on a 1 m string (for example, on a harp)? the linear

Allisa [31]

The frequency of middle C on a string is
f = 261.6 Hz.

The given linear density is
ρ = 0.02 g/cm = (0.02 x 10⁻³ kg)/(10⁻² m)
= 0.002 kg/m

The length of the string is L = 1 m.

Let T = the tension in the string (N).
The velocity of the standing wave is
$v= \sqrt{ \frac{T}{\rho} }$

In the fundamental mode, the wavelength, λ, is equal to the length, L.
That is
Because v = fλ, therefore
$\sqrt{ \frac{T}{\rho} } =f \lambda = fL \\\\ \frac{T}{\rho} = (fL)^{2} \\\\ T = \rho (fL)^{2}$

From given information, obtain
T = (0.002 kg/m)*(261.6 1/s)²*(1 m)²
= 136.87 N

Answer: 136.9 N (nearest tenth)

4 0

3 years ago