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3 years ago

What is carried by a wave?

Physics

2 answers:

prohojiy [21]3 years ago

6 0

Answer

Energy

Explanation

wave is a disturbance which travels through a medium carrying energy from one point to another without causing any permanent displacement in that medium. So energy is carried by a wave.

Nata [24]3 years ago

3 0

Waves carry energy from one place to another. Because waves carry energy, some waves are used for communication, eg radio and television waves and mobile telephone signals. ... Some types of waves need to be transmitted through matter, either a solid, liquid or a gas. For example, water waves have to travel in water.

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Fusion is the change of phase from: O gas to liquid O liquid to solid O liquid to gas O solid to liquid

PolarNik [594]

Answer:

Fusion is the change of phase from: solid to liquid.

Explanation:

Fusion is defined as change of of a substance from solid state to liquid state.Also known as melting.

Solid → liquid (Fusion)

Vaporization is defined as change of of a substance from liquid state to gaseous state.

liquid → gas (vaporization)

Freezing is defined as change of of a substance from liquid state to solid state.

liquid → solid (solidification)

Deposition is defined as change of of a substance from gaseous state to solid state.Also known as melting.

Gas→ solid (deposition)

Sublimation is defined as change of of a substance from solid state to gaseous state.Also known as melting.

Solid → gas (sublimation)

Condensation is defined as change of of a substance from gaseous state to solid state.Also known as melting.

Gas→ liquid (Condensation)

4 0

3 years ago

A rock is thrown horizontally from a cliff with a speed of 15 m/s. It falls half the height of the cliff in the last three secon

klemol [59]

Answer:

A) 10.243 s

B) 514.64 m

C) 153.645 m

Explanation:

From projectile motion;

y(t) = h - ½gt²

Where;

h is the height of cliff

t is the time taken to fall from top of cliff down to half the height of the cliff

y(t) is height of the rock as function of time

We are told the rock falls half way of the cliff height.

Thus;

y = h/2

So;

h/2 = h - ½gt²

This gives;

h - h/2 = ½gt²

h/2 = ½gt²

h = gt² - - - - (1)

Also,the total free fall time from top of the cliff to ground would be;

T = t + 3

Thus, distance at this point is zero.

So;

0 = h - ½gT²

h = ½gT²

Putting t + 3 for T, we have;

h = (1/2)g(t + 3)² - - - 2

Inspecting eq 1 and eq 2,we have;

gt² = (1/2)g(t + 3)²

g will cancel out to give;

2t² = t² + 6t + 9

t² - 6t - 9 = 0

The roots are -1.243 or 7.243.

We will pick the positive value as time can't be negative.

Thus, T = 7.243 + 3 = 10.243 s

h = gt² = 9.81 × 7.243²

h = 514.64 m

Formula for horizontal distance is given by;

x = uT

Where u is initial speed given as;

u = 15 m/s

Thus;

x = 15 × 10.243

x = 153.645 m

8 0

3 years ago

A refrigerator has a power of 90 w and is left on for 24 hours. A hair dryer has a power of 900 w an is on for 20 minutes. Which

Musya8 [376]

The refrigerator has consumed more energy

Explanation:

The relationship between power and energy consumed by a device is given by

$E=Pt$

where

E is the energy

P is the power

t is the time elapsed

For the refrigerator, we have

P = 90 W

$t = 24 h \cdot 3600 = 86400 s$

Therefore the energy consumed is

$E=(90)(86400)=7.78\cdot 10^6 J$

For the hair dryer, we have

P = 900 W

$t = 20 min \cdot 60 = 1200 s$

Therefore the energy consumed is

$E=(900)(1200)=1.08\cdot 10^6 J$

Therefore, the refrigerator has consumed more energy.

Learn more about power:

brainly.com/question/7956557

#LearnwithBrainly

4 0

3 years ago

Astronomers discover a planet orbiting around a star similar to our sun that is 35 light years away. How fast must a rocket ship

liubo4ka [24]

Answer:

$v = 0.7071c$

Explanation:

Given

Distance to the planet = 35 light years. So, the entire distance is: 2 * 35 = 70.

$\triangle{x'} = 70$

$T_0 = 70\ years$ i.e time of travel of the ship.

For the observer on earth, the time is:

$T' = \gamma T_0$

The required speed so that it does not take more than 70 years is then calculated using:

$\triangle x' = vT'$

Substitute $T' = \gamma T_0$

$\triangle x' = v\gamma T_0$

$\gamma = \frac{1}{\sqrt{1 - v^2/c^2}}$

So, we have:

$\triangle x' = \frac{vT_0}{\sqrt{1 - v^2/c^2}}$

Make v the subject of formula.

Square both sides

$\triangle x'^2 = \frac{v^2T^2_0}{1 - v^2/c^2}$

Cross Multiply

$(1 - \frac{v^2}{c^2}) *\triangle x'^2 = v^2T^2_0$

Divide both sides by $\triangle x'^2$

$(1 - \frac{v^2}{c^2}) = \frac{v^2T^2_0}{\triangle x'^2}$

Divide through by $v^2$

$(\frac{1}{v^2} - \frac{v^2}{v^2*c^2}) = \frac{v^2T^2_0}{v^2\triangle x'^2}$

$\frac{1}{v^2} - \frac{1}{c^2} = \frac{T^2_0}{\triangle x'^2}$

Make $\frac{1}{v^2}$ the subject

$\frac{1}{v^2} = \frac{T^2_0}{\triangle x'^2} + \frac{1}{c^2}$

Inverse both sides

$v^2 = \frac{1}{\frac{T^2_0}{\triangle x'^2} + \frac{1}{c^2}}$

Take square root of both sides

$v = \sqrt{\frac{1}{\frac{T^2_0}{\triangle x'^2} + \frac{1}{c^2}}}$

Substitute values for $T_0$ and $\triangle x$

$v = \sqrt{\frac{1}{\frac{70^2}{(70c)^2} + \frac{1}{c^2}}}$

$v = \sqrt{\frac{1}{\frac{70^2}{70^2*c^2} + \frac{1}{c^2}}}$

$v = \sqrt{\frac{1}{\frac{1}{c^2} + \frac{1}{c^2}}}$

$v = \sqrt{\frac{1}{\frac{2}{c^2}}}$

$v = \sqrt{\frac{c^2}{2}}$

$v = c\sqrt{\frac{1}{2}}$

$v = c * 0.7071$

$v = 0.7071c$

7 0

2 years ago

Which term best describes the important pieces of information that scientists gather and record during an experiment?

weeeeeb [17]

Answer:

It will for sure be <em>data</em>, that is the name for information gathered from any experiment

4 0

2 years ago

Read 2 more answers