3 years ago

Which type of wave needs a medium to travel?

Physics

2 answers:

aev [14]3 years ago

7 0

what's the doubt?

u already gave the answer

Kazeer [188]3 years ago

4 0

Answer:

Mechanical Waves

Why I Know:

Science Class

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Explain an amusement park you've ridden discuss the conversion of energy on that ride

nika2105 [10]

Roller coaster...

going up... building the potential energy....

SCREAM... AND SCREAM... kinetic energy upon kinetic energy being used

rinse and repeat

6 0

3 years ago

You flip a coin straight up if the coin reaches a high point of 0.25 m above where you released it what was the initial speed?

Julli [10]

Answer: 2.21 m/s

Explanation:

Given

Coin reaches a height of 0.25 m above the launch point

Suppose u is the initial speed of the coin

Using the equation of motion

$\Rightarrow v^2-u^2=2as\\$

Putting values

$\Rightarrow 0^2-u^2=2\times g\times s=2\times (-9.8)\times 0.25\\\Rightarrow u^2=4.9\\\Rightarrow u=2.21\ m/s$

Thus, the initial velocity is 2.21 m/s

6 0

2 years ago

The region of the globe directly beneath the Sun is warmer because it ____. A. sees more intense wavelengths reaching the surfac

sineoko [7]

The answer is A. Sees more intense wavelengths reaching the surface

4 0

2 years ago

As you stand by the side of the road, a car approaches you at a constant speed, sounding its horn, and you hear a frequency of 8

kap26 [50]

Answer: velocity of the car is 113.33m/s

Explanation:

From Doppler effect,

in the case which the source is moving towards the observer at rest

f2 = v/(v-vs) *f1

where f2 is the final observed frequency

f1 is the initial observed frequency

v = 340m/s (speed of sound in air)

vs = velocity of the source of sound.

rearranging the above equation

f2*(v - vs) = f1* v

vs = (f1* v/f2) - v

but f1 = 80Hz

f2 = 60Hz

v = 340m/s

substituting,

vs = (80 x 340)/60 - 340

vs = 453.33 - 340

vs = 113.33m/s

velocity of the car is 113.33m/s

5 0

3 years ago

If the absolute pressure of a gas is 550.280 kPa, its gage pressure is A. 101.325 kPa. B. 651.605 kPa. C. 448.955 kPa. D. 277.28

guajiro [1.7K]

Answer:

Option C is the correct answer.

Explanation:

Absolute pressure is sum of gauge pressure and atmospheric pressure.

That is

$P_{abs}=P_{gauge}+P_{atm}$

We have

$P_{abs}=550.280 kPa\\\\P_{atm}=1atm=101325Pa=101.325kPa$

Substituting

$P_{abs}=P_{gauge}+P_{atm}\\\\550.280=P_{gauge}+101.325\\\\P_{gauge}=448.955kPa$

Option C is the correct answer.

7 0

3 years ago