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4 years ago

The weight on the moon is....that of earth.

Physics

1 answer:

Elena L [17]4 years ago

6 0

Answer:

16.5% that of on earth

Explanation:

from google:

Your weight on the Moon is 16.5% what you would experience on Earth. In other words, if you weighed 100 kg on Earth, you would weigh a mere 16.5 kg on the Moon.

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A hydrogen atom contains a single electron that moves in a circular orbit about a single proton. Assume the proton is stationary

riadik2000 [5.3K]

Answer:

Radius between electron and proton $= 6.804\times 10^{-10}m$

Explanation:

The motion of the electron is carried out in the orbit due to the balancing of the electrostatic force between the proton and the electron and the centripetal force acting on the electron.

The electrostatic force is given as = $\frac{kq_1q_2}{r^2}$

Where,

k = coulomb's law constant (9×10⁹ N-m²/C²)

q₁ and q₂ = charges = 1.6 × 10⁻¹⁹ C

r = radius between the proton and the electron

Also,

Centripetal force on the moving electron is given as:

= $\frac{m_eV^2}{r}$

where,

$m_e$ = mass of the electron (9.1 ×10⁻³¹ kg)

V = velocity of the moving electron (given: 6.1 ×10⁵ m/s)

Now equating both the formulas, we have

$\frac{kq_1q_2}{r^2}$ = $\frac{m_eV^2}{r}$

⇒ $r = \frac{kq_1q_2}{m_eV^2}$

substituting the values in the above equation we get,

$r = \frac{9\times 10^{9}\times (1.6\times 10^{-19})^2}{9.1\times 10^{-31}\times (6.1\times 10^5)^2}$

⇒ $r = 6.804\times 10^{-10}m$

3 0

3 years ago

A wire 95.0 mm long is bent in a right angle such that the wire starts at the origin and goes in a straight line to x = 40.0 mm

qaws [65]

Answer:

0.1040512455 N

$36.03^{\circ}\ or\ 323.97^{\circ}in\ CCW\ direction$

0.05925 N

$29.74^{\circ}\ or\ 330.26^{\circ}in\ CCW\ direction$

Explanation:

I = Current

B = Magnetic field

Separation between end points is

$l=\sqrt{40^2+55^2}\\\Rightarrow l=68.00735\ mm$

Effective force is given by

$F=IlB\\\Rightarrow F=5.1\times 68.00735\times 10^{-3}\times 0.3\\\Rightarrow F=0.1040512455\ N$

The force is 0.1040512455 N

$tan\theta=\dfrac{55}{40}\\\Rightarrow \theta=tan^{-1}\dfrac{55}{40}\\\Rightarrow \theta=53.97^{\circ}$

The angle the force makes is given by

$\alpha=\theta-90\\\Rightarrow \alpha=53.97-90\\\Rightarrow \alpha=-36.03^{\circ}\ or\ 323.97^{\circ}in\ CCW\ direction$

The direction is $36.03^{\circ}\ or\ 323.97^{\circ}in\ CCW\ direction$

$F=IlB\\\Rightarrow F=4.9\times \sqrt{20^2+35^2}\times 10^{-3}\times 0.3\\\Rightarrow F=0.05925\ N$

The force is 0.05925 N

$tan\theta=\dfrac{35}{20}\\\Rightarrow \theta=tan^{-1}\dfrac{35}{20}\\\Rightarrow \theta=60.26^{\circ}$

$\alpha=\theta-90\\\Rightarrow \alpha=60.26-90\\\Rightarrow \alpha=-29.74^{\circ}\ or\ 330.26^{\circ}in\ CCW\ direction$

The direction is $29.74^{\circ}\ or\ 330.26^{\circ}in\ CCW\ direction$

4 0

3 years ago

Explain why the speed of light is lower than 3.0 × 108 m/s as it goes through different media.

alexandr1967 [171]

Answer:

air or vacuum is the least refractive index medium of most rare medium

all other medium has more value of refractive index and hence the speed will be less than the speed of the air

Explanation:

As we know that speed of light in any medium and speed of light in air is related to each other by the equation

$v = \frac{c}{\mu}$

here we know that

$c = 3 \times 10^8 m/s$

[tex]\mu [tex] = refractive index of the medium

so we know that air or vacuum is the least refractive index medium of most rare medium

all other medium has more value of refractive index and hence the speed will be less than the speed of the air

4 0

3 years ago

Read 2 more answers

Which<br> factors will increase the speed of a sound wave in the air?

Dafna11 [192]

A higher temperature, stiffer materials, and less dense materials increase the speed of sound.

7 0

4 years ago

Do you think that rubbing two pieces of woods together would have more or less friction than wood rubbing against smooth metal ?

jek_recluse [69]

I think rubbing two pieces of woods together will have more friction than wood rubbing against a smooth metal.

<u>Explanation:</u>

The friction offered by surfaces has a great role in deciding the ease of movement of objects along the surface.

The friction of the surface depends upon its roughness. Rough surfaces offer greater friction than smooth surfaces.

In this question wooden pieces have greater friction than that of smooth metal. So rubbing two wooden pieces together will have greater friction than rubbing a wooden piece against a smooth metal.

5 0

4 years ago

The weight on the moon is....that of earth.​

The weight on the moon is....that of earth.