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3 years ago

Which occurs when a wave is reflected

Physics

2 answers:

Schach [20]3 years ago

3 0

Reflection. It occurs when a wave bounces from the surface of an obstacle

allsm [11]3 years ago

3 0

Answer:

It can flip upside down

Explanation:

I did Gradpoint :)

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Light waves and sound waves have many similar behaviors, such as reflection and refraction. One behavior they do not share is

Leto [7]

Answer:

light waves can travel in vacuum but sound waves require a medium to travel

also light waves are electromagnetic waves while sound waves are mechanical, light waves are transverse waves while sound waves are longitudinal waves

8 0

2 years ago

Suppose you are planning a trip in which a spacecraft is to travel at a constant velocity for exactly six months, as measured by

mylen [45]

Answer:

<em>I must travel with a speed of 2.97 x 10^8 m/s</em>

Explanation:

Sine the spacecraft flies at the same speed in the to and fro distance of the journey, then the time taken will be 6 months plus 6 months

Time that elapses on the spacecraft = 1 year

On earth the people have advanced 120 yrs

According to relativity, the time contraction on the spacecraft is gotten from

$t$ = $t_{0} /\sqrt{1 - \beta ^{2} }$

where

$t$ is the time that elapses on the spacecraft = 120 years

$t_{0}$ = time here on Earth = 1 year

$\beta$ is the ratio v/c

where

v is the speed of the spacecraft = ?

c is the speed of light = 3 x 10^8 m/s

substituting values, we have

120 = 1/ $\sqrt{1 - \beta ^{2} }$

squaring both sides of the equation, we have

14400 = 1/ $(1 - \beta ^{2} )$

14400 - 14400 $\beta ^{2}$ = 1

14400 - 1 = 14400 $\beta ^{2}$

14399 = 14400 $\beta ^{2}$

$\beta ^{2}$ = 14399/14400 = 0.99

$\beta = \sqrt{0.99}$ = 0.99

substitute β = v/c

v/c = 0.99

but c = 3 x 10^8 m/s

v = 0.99c = 0.99 x 3 x 10^8 = <em>2.97 x 10^8 m/s</em>

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3 years ago

A rogue band of colonists on the moon declares war and prepares to use a catapult to launch large boulders at the earth. Assume

insens350 [35]

Answer:

2.3 km/s
11 km/s

Explanation:

The system is made up of three body system which are the boulder, earth and the moon also the sum of potential ad kinetic energies are assumed to be the same also note that the boulder was launched from the moon at an initial velocity

A ) Minimum speed of the boulder for it to reach the earth = 2.3 km/s

B) ignoring air resistance the impact speed on earth of a boulder launched at this minimum speed = 11 km/s

find attached the solution in details

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3 years ago

The federal government spends the most on which of the following?

sveta [45]

As Figure A suggests, Social Security is the single largest mandatory spending item, taking up 38% or nearly $1,050 billion of the $2,736 billion total. The next largest expenditures are Medicare and Income Security, with the remaining amount going to Medicaid, Veterans Benefits, and other programs.

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3 years ago

Which of the following statements does not represent a benefit of peer relationships? A. Jason and Sean argued over whose turn i

Wewaii [24]

C does not represent a benefit, so that seems most logical.

A) they comprised.
B) at least ones listening
D) nothings wring with that

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3 years ago

Read 2 more answers