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3 years ago

Dinitrogen oxide has?

1 answer:

3 0

Two atoms of the element bind to form dinitrogen and it’s a colourless and odorless diatomic gas with the formula N2. Also Dinitrogen forms up about 78% of earths atmosphere

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When you hear sound pulses (beats), describe how you will determine the beat frequency. Include in your answer what steps you wi

garik1379 [7]

Answer:

Beat frequency is determined by the number of beats per second one hears from the sound. It can also be determined by taking the difference in frequency of the two notes that interfere to produce the beat.

Explanation:

Beat frequency is determined by the number of beats per second one hears from the sound.

Assuming the sound pulses is coming from two tuning forks;

Frequency of the first tuning fork (F₁) is known as 240Hz

Frequency of the second tuning fork (F₂) is not known

there are 8 beats in 2 seconds

Beat Frequency = number of beats/time

Beat Frequency = 8/2 = 4Hz

Beat Frequency = F₂ - F₁

±4 = F₂ - 240

4 = F₂ - 240

4+240 = F₂

244 = F₂

F₂ = 244 Hz

-4 = F₂ - 240

-4 + 240 = F₂

F₂ = 236 Hz

The percentage uncertainty in the beat frequency is

4 /240 = 0.0167 = 1.67%

To reduce the percentage uncertainty in the beat frequency

A tuning fork of almost the same frequency as the first tuning fork are used to produce sound pulses, let's say the frequency of the second tuning fork is 241 Hz.

The beat frequency = 241Hz -240Hz = I Hz

Then, the percentage uncertainty = 1/240 = 0.00416 =0.416%

7 0

4 years ago

The magnitude of the electrostatic force between two identical ions that are separated by a distance of 8.3 × 10-10m is 192.9 ×

iragen [17]

Answer:

(a) 1.215 x 10^-13 J

(b) n = 7.6 x 10^5

Explanation:

distance, r = 8.3 x 10^-10 m

Force, F = 192.9 x 10^-9 N

Let the charge is q.

(a) According to the Coulomb's law

$F=\frac{Kq\times q}{r^{2}}$

$192.9\times10^{-9}=\frac{9\times10^{9}\times q\times q}{\left (8.3\times 10^{-10} \right )^{2}}$

q = 1.215 x 10^-13 C

(b) Let n number of electrons are missing.

$n = \frac{q}{e}=\frac{1.215\times10^{-13}}{1.6\times10^{-19}}$

n = 7.6 x 10^5

4 0

4 years ago

To determine the amplitude of a wave, you would need to know the . A) distance from the crest to the trough. B) maximum displace

Alexxx [7]

To determine the amplitude of a wave, you would need to know the : B. Maximum displacement of the wave from the equilibrium position

You can find out the displacement by counting the waves that is
written on the Graph

Hope this helps

4 0

3 years ago

Read 2 more answers

A Doppler blood flow unit emits ultrasound at 4.8 MHz. What is the frequency shift of the ultrasound reflected from blood moving

Vedmedyk [2.9K]

Answer:

1300 Hz

Explanation:

f' = Actual frequency = 4.8 MHz

f = Observed frequency

$v_r$ = Relative velocity of blood = 0.21 m/s

v = Velocity of ultrasound = 1540 m/s

From the Doppler effect formula we have

$f=f'\dfrac{v+v_r}{v-v_r}\\\Rightarrow f=4.8\dfrac{1540+0.21}{1540-0.21}\\\Rightarrow f=4.80130\ Hz$

Frequency shift is given by

$\Delta f=f-f'\\\Rightarrow \Delta f=4.8013-4.8\\\Rightarrow \Delta f=0.0013\ MHz=1300\ Hz$

The frequency shift in the sound is 1300 Hz

6 0

3 years ago

Plz help i really need this

ddd [48]

Answer:

The reactivity of metals increases as you move left in a period and as you move down in a group, so Marie needs to know the period and group of the element inside each box. Boxes that show locations in groups 1 or 2 or in period 8 contain the most reactive elements.

Explanation:

6 0

3 years ago

Read 2 more answers