How long would it take a sound wave from a car alarm to travel 1 km if the temperature is 0 degrees Celsius

Answers

Answer 1

Answer: The speed of sound in dry air at 0°C is 331.3 meters per second.

(1,000 meters) x (1 second / 331.3 meters) = 3.018 seconds .

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The longest wavelength within the visible spectrum is _______ light. A. blue B. orange C. red D. violet
The part of the cerebrum that controls voluntary movements is located in the _______ lobe. A. frontal B. parietal C. temporal D. occipital
As a liquid is added to a beaker, the pressure exerted by the liquid on the bottom of the beaker ________.
Poise under pressure, dealing with adversity, and self-esteem are all parts of which type of health? A. emotional health B. mental heal C. physical health D. social health

A radio wave has a frequency of 5.5 × 104 hertz and travels at a speed of 3.0 × 108 meters/second. what is its wavelength? a. 5.5 × 104 meters b. 5.0 × 103 meters c. 5.5 × 103 meters d. 3.0 × 108 meters

Answers

The wavelength of the radio wave is 5.5 × 10³ m. If the frequency of the wave is 5.5 × 10⁴ hertz and the speed of the wave is 3.0 × 10⁸ m/sec.

The speed(v) of a wave is the product of wavelength(λ) and the frequency(η). We can understand this relation by the definition of the speed, which is the distance travelled by the object in unit time. The unit of distance is meter, also the unit of the wavelength is meter. On the other hand the unit of frequency is sec⁻¹. So,

Speed of a wave(v) = wavelength(λ) × Frequency(η)

Wavelength(λ) = speed of the wave(v)/Frequency(η)

Wavelength(λ) = (3.0 × 10⁸)/(5.5 × 10⁴)

Wavelength(λ) = 5.5 × 10³ m

To know more about wavelength, here

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The three major scales used to measure earthquakes are Mercalli Scale, Richter Scale and Magnitude Scale.

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The statement ‘The three major scales used to measure earthquakes are Mercalli Scale, Richter Scale and Magnitude Scale’ is true. These three scales used to measure the seismic waves released by the earthquake.

Answer:true

Explanation:

A cannon is shot from the ground with a speed of 100 m/s at an unknown angle, if itlands after being in the air for 6 s, what was the angle of the launch?

Answers

Answer:

The angle of the launch is 17.09 degrees.

Explanation:

Given that,

The initial speed of a cannon is 100 m/s

It is launched at some angle and it lands after being in the air for 6 s.

We need to find the angle of the launch.

The time taken by the projectile to reach the ground is called the time of flight. It is given by the formula as follows :

$T=(2u\sin\theta)/(g)$

Here, $\theta$ = launch angle

$\sin\theta=(Tg)/(2u)\n\n\sin\theta=(6* 9.8)/(2* 100)\n\n\theta=\sin^(-1)(0.294)\n\n\theta=17.09^(\circ)$

Hence, the angle of the launch is 17.09 degrees.

Suppose you are standing in front of a concave spherical mirror. Which of the following image properties are possible? Your image is upright.Your image is inverted.

Your image is enlarged.

Your image is reduced.

Your image is real.

Your image is virtual.

All of the above.

Answers

Answer:

All are correct

Explanation:

A concave spherical mirror produces both types of images real and virtual of an object.

The concave spherical mirror forms a real image when the object placed between the focus and infinity.

The concave spherical mirror forms a virtual image when the object is placed between focus and the pole of the mirror.

So, it forms real and virtual both types of images and it forms the image size is more than object size, equal to object size and less than the object image.

All the options are correct.

Can somebody please explain to me how the acceleration in simple hormonic motion is proportional to the displacement..

Answers

When you graph simple harmonic motion in an acceleration versus displacement graph, the graph at any point would be linear. The graph would also pass through the origin giving proportionality of acceleration to negative displacement. Definition of proportionality neglects the negative value of the displacement so therefore acceleration is proportional to displacement. The acceleration of the motion is always directed towards equilibrium and so at maximum displacement, there would be greatest negative acceleration and vise versa.At the origin, the displacement would be zero and acceleration would also be zero

Which of these qualities most likely helped Ptolemy construct the scientific explanation of the solar system? originality and creativity
generosity and helpfulness
consideration and compassion
kind-heartedness and flexibility

Answers

Scientific models or explanations are a way of interpreting and analyzing huge amounts of data. Scientists must be able to find patterns in this data, and this requires originality and creativity (this is the correct answer), as they need to look at the data through different metaphorical lenses.

Answer:

originality and creativity

Explanation:

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