When the net force of opposite forces is zero, the forces are

A coin is located 35.0 mm from the center of a turntable which accelerates from rest to a speed of 7.95 rad/s in 0.270 s. What i

beks73 [17]

The minimum coefficient of friction to avoid slippage of the coin is 0.23.

<h3>Minimum coefficient of friction</h3>

The minimum coefficient of friction can determined from the maximum speed of the coin.

ma = μmg

mv²/r = μmg

v²/r = μg

v² = μgr

μ = v²/(gr)

μ = (ωr)²/(gr)

μ = ω²r/g

μ = (7.95² x 0.035)/(9.8)

μ = 0.23

Learn more about coefficient of friction here: brainly.com/question/20241845

#SPJ11

5 0

2 years ago

A charge Q acts on a point charge to create an electric field. Its strength, measured a distance of 40 cm away is 100 N/C. What

KIM [24]

Answer:

$E_2=80N/C$

Explanation:

From the question we are told that:

Initial Distance $d_1=40cm=>0.4m$

Initial Electric field strength $E_1=100N/C$

Final Distance $d_2=20cm=>0.20m$

Generally the equation for Electric field is mathematically given by.

$E=\frac{kq}{d^2}$

$q=\frac{100*(0.4)^2}{K}$

Substituting q for $d=20cm$

$E_2=\frac{k}{0.2}*\frac{100*(0.4)^2}{K}$

$E_2=80N/C$

6 0

3 years ago

A museum sets up a display of fluorescent minerals. which best describes how electromagnetic waves can be used to enhance the di

IRISSAK [1]

Answer:

ultraviolet light shining on the minerals will cause them to give off visible light.

Explanation:

Here we know that in all electromagnetic waves have certain range of energy

Here in the above case when a given frequency range of electromagnetic wave incident on the fluorescent mineral then that mineral will absorb few amount of energy and the remaining energy will throw back into the surrounding again.

So here the main concept is that when a electromagnetic wave which is higher in energy then visible light incident on fluorescent material then it will absorb some amount of energy and the remaining energy is released in form of light

So here energy more than visible light is for ultraviolet light only

so here the correct answer would be

ultraviolet light shining on the minerals will cause them to give off visible light.

3 0

3 years ago

Read 2 more answers

Earth turns on its axis about once every 24 hours. The Earth's equatorial radius is 6.38 x 106 m. If some catastrophe caused Ear

san4es73 [151]

To solve this problem it is necessary to apply the concepts related to the Period of a body and the relationship between angular velocity and linear velocity.

The angular velocity as a function of the period is described as

$\omega = \frac{2\pi}{T}$

Where,

$\omega =$ Angular velocity

T = Period

At the same time the relationship between Angular velocity and linear velocity is described by the equation.

$v = \omega r$

Where,

r = Radius

Our values are given as,

$T = 24 hours$

$T = 24hours (\frac{3600s}{1 hour})$

$T = 86400s$

We also know that the radius of the earth (r) is approximately

$6.38*10^6m$

Usando la ecuación de la velocidad angular entonces tenemos que

$\omega = \frac{2\pi}{T}$

$\omega = \frac{2\pi}{86400}$

$\omega = 7.272*10^{-5}rad/s$

Then the linear velocity would be,

$v = \omega *r$

x $v = \omega *r$

$v= 463.96m/s$

The speed would Earth's inhabitants who live at the equator go flying off Earth's surface is 463.96

3 0

3 years ago

When storm clouds produce lightning and thunder, energy changes to energy and energy.

balandron [24]

When storm clouds produce lightening and thunder, then, potential energy changes into kinectic energy.

The clouds become negatively charged,and the ground is positively charged during a storm. So there creates a potential difference between the charged clouds and the ground. And when this becomes huge so much that it over comes the electrical insulation cover of air, the electrons jump to the ground.i.e. the potential energy changes into kinetic energy.

8 0

3 years ago

Read 2 more answers