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3 years ago

Reflection occurs when a wave _____.

Physics

2 answers:

madam [21]3 years ago

8 0

Answer: The correct answer is " bounces off an object".

Explanation:

Reflection occurs when a wave bounces off an object.

For example, when a ray of light incidents on the surface of a plane mirror. The light gets reflected from the plane mirror because of the silver polishing on the backside of the mirror.

There are two laws of reflection:

(1) The reflected ray, the incident ray and the normal to the surface of the mirror are all lie in the same plane.

(2) The angle of reflection is equal to the angle of incidence.

faust18 [17]3 years ago

3 0

When they bounce off a barrier

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A train traveled at an average speed of 80 mph for 4.2 hours. Then, it traveled at an average speed of 60 mph for 1.5 hours. Wha

Alenkasestr [34]

Answer:

The answer is four hundred twenty six or 426

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4 years ago

How to find instantaneous velocity physics?

evablogger [386]

You should have the velocity as a function of time either given explicitly or implicitly (a graph)

v = ds/dt (differentiating the position vector)

integrating the acceleration.

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3 years ago

What is the average kinetic energy of helium atoms in a region of the solar corona where the temperature is 5.90 x 10^5 K?

OLEGan [10]

Answer: The average kinetic energy of helium atoms is $1.222\times 10^{-17}J$

Explanation:

To calculate the average kinetic energy of the atom, we use the equation:

$K=\frac{3}{2}kT$

where,

K = average kinetic energy = ?

k = Boltzmann constant = $1.3807\times 10^{-23}J/K$

T = temperature = $5.9\times 10^5K$

Putting values in above equation, we get:

$K=\frac{3}{2}\times 1.3807\times 10^{-23}J/K\times 5.9\times 10^5K\\\\K=1.222\times 10^{-17}J$

Hence, the average kinetic energy of helium atoms is $1.222\times 10^{-17}J$

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3 years ago

Which of these is a concave lens?

Stella [2.4K]

Answer:

I think its last one picture

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3 years ago

Read 2 more answers

A wheel of radius 30 cm is rotating at a rate of 2.0 revolutions every 0.080 s. (A) through what angle, in radians, does the whe

Alchen [17]

A)
2revs in 0.08s
so in 1s thats 25revs
therefore thats 50π radians in one second

b)
well, ω=2π/T
therefore ω=50π = 157.079rads^-1
and v=rω where r is in meters;
v=0.3x157.079
v=47.123ms^-1

c)
f=1/T
f=1/period for one rotation
1 rotation = 0.08/2 = 0.04
f=1/0.04
f=25Hz

6 0

3 years ago