With their up-and-down and side-to-side motions, s waves shake the ground surface and can do severe damage to buildings.

If the speed of light in a substance is 2.26 x 10^8 m/s, what is the index of refraction of that substance?

vladimir1956 [14]

Answer:

1.33

Explanation:

speed of light in vacuum, c = 3 x 10^8 m/s

speed of light in medium, v = 2.26 x 10^8 m/s

The refractive index of the medium is given by

μ = speed of light in vacuum / speed of light in medium

μ = (3 x 10^8) / (2.26 x 10^8)

μ = 1.33

4 0

3 years ago

a 0.0215m diameter coin rolls up a 20 degree inclined plane. the coin starts with an initial angular speed of 55.2rad/s and roll

marissa [1.9K]

Answer:

$h = 0.0362\,m$

Explanation:

Given the absence of non-conservative force, the motion of the coin is modelled after the Principle of Energy Conservation solely.

$U_{g,A} + K_{A} = U_{g,B} + K_{B}$

$U_{g,B} - U_{g,A} = K_{A} - K_{B}$

$m\cdot g \cdot h = \frac{1}{2}\cdot I \cdot \omega_{o}^{2}$

The moment of inertia of the coin is:

$I = \frac{1}{2}\cdot m \cdot r^{2}$

After some algebraic handling, an expression for the maximum vertical height is derived:

$m\cdot g \cdot h = \frac{1}{4}\cdot m \cdot r^{2}\cdot \omega_{o}^{2}$

$h = \frac{r^{2}\cdot \omega_{o}^{2}}{g}$

$h = \frac{(0.0108\,m)^{2}\cdot (55.2\,\frac{rad}{s} )^{2}}{9.807\,\frac{m}{s^{2}} }$

$h = 0.0362\,m$

3 0

3 years ago

The spheres are connected by a uncharged teflon rod. what is the charge on the left sphere after the charged plastic rod touches

vodomira [7]

The charge on the left sphere negatively charged.

<h3 /><h3>What is charge?</h3>

Due to the physical property of electric charge, charged material experiences a force when it is subjected to an electromagnetic field. You might be electrically positive or negative. While similar charges repel one another, opposite charges attract.

In order for the neutral metal sphere and negatively charged metal rod to have the same potential, some negative charge must flow from the rod to the sphere in order for them to both have negative charges.

The sum of the negative charges in them would be equal to the initial negative charge in the rod since the entire charge is preserved.

to learn more about charge go to -

brainly.com/question/18102056

#SPJ4

8 0

2 years ago

A child and her mother are at the park. The child walks around the rectangular park while her mom waits on a bench. The child re

kati45 [8]

the correct answer is 0

7 0

3 years ago

If the ammeter is 07 mA and the resistor is 56 ohms what is the voltage ?

maxonik [38]

Answer:

V = 0.0392 volt

Explanation:

given that the

Current I = 0.7 mA

Resistance R = 56 Ohms

According to Ohm's law,

V = IR

Where V is the Voltage in the circuit.

Substitute I and R into the formula

V = 0.7 ×10^-3 × 56

V = 0.0392 volt

The ammeter can be use to read current in a circuit when it is connected to the device in which the resistors are connected in series.

While for the Voltmeter, the resistors are connected in parallel.

6 0

3 years ago