Which two atmospheric gases do not react with many substances?

Two charged particles, with charges q1=q and q2=4q, are located at a distance d= 2.00cm apart on the x axis. A third charged par

Murrr4er [49]

Answer:

X₃₁ = 0.58 m and X₃₂ = -1.38 m

Explanation:

For this exercise we use Newton's second law where the force is the Coulomb force

F₁₃ - F₂₃ = 0

F₁₃ = F₂₃

Since all charges are of the same sign, forces are repulsive

F₁₃ = k q₁ q₃ / r₁₃²

F₂₃ = k q₂ q₃ / r₂₃²

Let's find the distances

r₁₃ = x₃- 0

r₂₃ = 2 –x₃

We substitute

k q q / x₃² = k 4q q / (2-x₃)²

q² (2 - x₃)² = 4 q² x₃²

4- 4x₃ + x₃² = 4 x₃²

5x₃² + 4 x₃ - 4 = 0

We solve the quadratic equation

x₃ = [-4 ±√(16 - 4 5 (-4)) ] / 2 5

x₃ = [-4 ± 9.80] 10

X₃₁ = 0.58 m

X₃₂ = -1.38 m

For this two distance it is given that the two forces are equal

7 0

3 years ago

A runner is training and runs past meter mark 65 and starts a stopwatch. After the runner passes meter mark 15 the stopwatch sto

denis-greek [22]

Answer:

6.25 m/s

Explanation:

Given parameters

Initial mark = 65

Final mark = 15

time taken = 8s

Unknown:

Velocity of the runner = ?

Solution:

Velocity is the displacement divided by time;

Velocity = $\frac{displacement}{time}$

Displacement = Initial mark - final mark = 65 - 15 = 50m

Now, insert the parameters and solve;

Velocity = $\frac{50}{8}$ = 6.25m/s

7 0

3 years ago

A Young'sdouble-slit interference experiment is performed with monochromatic light. The separation between the slits is 0.44 mm.

Artyom0805 [142]

Answer:

Explanation:

The double slit interference phonemene is described for the case of constructive interference

d sin θ= m λ (1)

let's use trigonometry to find the sinus

tan θ = y / L

in general in interference phenomena the angles are small

tan θ = sin θ / cos θ = sin θ

The double slit interference phonemene is described for the case of constructive interference

d sin θ = m lam (1)

let's use trigonometry to find the sinus

tan θ = y / L

in general in interference phenomena the angles are small

tan θ = sin θ / cos θ = sin θ

we substitute

sin θ = y / L

we substitute in equation 1

d y / L = m λ

λ = dy / L m

let's reduce the magnitudes to the SI system

d = 0.44 mm = 0.44 10⁻³ m

y = 5.5 mm = 5.5 10⁻³ m

L = 4.2m

m = 1

let's calculate

λ = 0.44 10⁻³ 5.5 10⁻³ / (4.2 1)

λ = 5.76190 10-7 m

let's reduce to num

lam = 5.56190 10-7 m (109 nm / 1m)

lam = 556,190 nmtea

we substitute

without tea = y / L

we substitute in equation 1

d y / L = m lam

lam = dy / L m

let's reduce the magnitudes to the SI system

d = 0.44 me = 0.44 10-3 m

y = 5.5 mm = 5.5 10-3

L = 4.2m

m = 1

let's calculate

lam = 0.44 10⁻³ 5.5 10⁻³ / (4.2 1)

lam = 5.76190 10⁻⁷ m

let's reduce to num

lam = 5.56190 10⁻⁷ m (109 nm / 1m)

lam = 556,190 nm

6 0

4 years ago

Why is sky blue and why moon appear in daytime

Elena L [17]

Answer:

The sky is blue because of the tiny molecules in the air and we see the moon in the day because the light of the sun is reflecting off the moon

Explanation:

Blue light is scattered in all directions by the tiny molecules of air in Earth's atmosphere. Blue is scattered more than other colors because it travels as shorter, smaller waves. This is why we see a blue sky most of the time. Closer to the horizon, the sky fades to a lighter blue or white.

We can see the moon during the day for the same reason we see the moon at night. The surface of the moon is reflecting the sun's light into our eyes. ... "When we see the moon during the day it's because the moon is in the right spot in the sky and it's reflecting enough light to be as bright, or brighter, than the sky."

4 0

3 years ago

Read 2 more answers

a sound wave is determined to have a frequency of 1,000 hz and wavelength of 35cm. what is the speed of this wave?

natulia [17]

Answer:

The speed of the sound wave is 350 m $s^{-1}$

Explanation:

Given

Frequency of sound wave = 1000Hz = 1000 $s^{-1}$ (since 1 $s^{-1}$ = 1 Hertz (Hz))

Wavelength of sound wave = 35 cm

Speed of sound wave = ?

All waves have same the relation among frequency, sound and speed which is given by

v=fλ , where

v is the speed

f is frequency

λ is wavelength

Therefore, the speed of sound wave = 1000 $s^{-1}$ x 35 cm

= 35000 cm $s^{-1}$

= 350 m $s^{-1}$

Hence the speed of the sound wave is 350 m $s^{-1}$

3 0

4 years ago