All categories

3 years ago

Where does wave reflection occur?

2 answers:

7 0

Wave reflection occurs when waves reflect or rebound off of a surface. This is like an echo because the sound waves are reflected from a distant surface

Galina-37 [17]3 years ago

3 0

Answer:

- at boundaries between two different media

Explanation:

Reflection is one phenomenon that occurs with waves. Reflection can occur when a wave meets the boundary between two different media: when this happens, the wave bounces back into the first media, but changing direction.

In fact, there is a precise relationship between the original direction of the wave and its final direction: calling "angle of incidence" the angle between the original direction and the normal to the surface, and "angle of reflection" the angle between the final direction and the normal to the surface, we have that

angle of reflection = angle of incidence

and this is called "law of reflection".

You might be interested in

This is a change in an object's position. Net Force Gravitational Pull Motion Force

alexira [117]

Answer:

Motion

Explanation:

because when something moves its call motion

3 0

3 years ago

Which of the following terms refers to the amount of thermal energy needed

frosja888 [35]

Latent heat
bddisjsjsjsjsixjsj

8 0

3 years ago

Read 2 more answers

Over a span of 6.0 seconds, a car changes it's speed from 89 km/h to 37 km/h. What is its average acceleration in meters per sec

scoundrel [369]

Acceleration = (change in speed) / (time for the change)

change in speed = (speed at the end) - (speed at the beginning)

change in speed = (37 km/hr) - (89 km/hr) = -52 km/hr

Acceleration = (-52 km/hr) / (6 sec)

Acceleration = (-26/3) km/(hr·sec)

Units: (1/hr·sec) · (hr/3600 sec) = 1 / 3600 sec²

(-26/3) km/(hr·sec) = (-26/3) km/(3600 sec²)

= -26,000/(3 · 3600) m/s²

Acceleration = -2.41 m/s²

3 0

4 years ago

17 copper wires of length l and diameter d are connected in parallel to form a single composite conductor of resistance R. What

Lubov Fominskaja [6]

Answer:

$\frac{D}{d} = 4.12$

Explanation:

As we know that resistance of one copper wire is given as

$r = \rho \frac{L}{a}$

here we know that

$a = \pi (\frac{d}{2})^2$

now we have

$r = \rho \frac{L}{\pi (\frac{d^2}{4})}$

$r = \rho \frac{4L}{\pi d^2}$

now we know that such 17 resistors are connected in parallel so we have

$R = \frac{r}{17}$

$R = \rho \frac{4L}{17 \pi d^2}$

Now if a single copper wire has same resistance then its diameter is D and it is given as

$R = \rho \frac{4L}{\pi D^2}$

now from above two equations we have

$\rho \frac{4L}{\pi D^2} = \rho \frac{4L}{17 \pi d^2}$

$D^2 = 17 d^2$

now we have

$\frac{D}{d} = 4.12$

3 0

3 years ago

What is the internal energy of 3.00 mol of N2 gas at 25 degrees C? To solve this problem, use the equation: U electronic gas = 5

allochka39001 [22]

Given data

Determine Internal energy of gas N₂, (U) = ?

Temperature (T) = 25° C

= 25+273 = 298 K,

Gas constant (R) = 8.31 J/ mol-K ,

Number of moles (n) = 3 moles,

Internal energy of N₂

Internal energy is a property of thermodynamics, the concept of internal energy can be understand by ideal gas. For example N₂, the observations for oxygen and nitrogen at atmospheric temperatures, f=5, (where f is translational degrees of freedom).

So per kilogram of gas,

The internal energy (U) = 5/2 .n.R.T

= (5/2) × 3 × 8.31 ×298

= 18572.85 J

The internal energy of the N₂ is 18,572.85 J and it is approximately equal to 18,600 J given in the option B.

8 0

3 years ago

Read 2 more answers