PHYSICS HIGH SCHOOL

Help with number 32
Apparently the answer is 4 but I have no idea why
Help with number 32 Apparently the answer is 4 but - 1

Answers

Answer 1
Answer: All you have to remember is that when the source is APPROACHING the observer,
the frequency seems HIGHER than what's actually leaving the source.

The siren is wailing at 1,000 Hz.

(1). 30.0 Hz . . . that's way lower

(2). 9.19 x 10² Hz = 919 Hz . . . that's lower

(3). 1.00 x 10³ Hz = 1,000 Hz . . . that's exactly the same

(4). 1.10 x 10³ Hz = 1,100 Hz . . . that's the only choice that's higher than 1,000 Hz.

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How does the use of mobile phones affect the stopping distance of a vehicle?

Answers

when a driver is using a phone,they pay less attention to the road and are less able to notice any changes

The LIGHT/DARKcontrol of an automatic toaster is placed at a particular setting. The toast at this setting will always be the same color because the toaster uses

Answers

The toast at this setting will always be the same color because the toaster uses a compensating thermostat. Depending on the setting, the compensating thermostat will be used to regulate the heat settings at different amounts of time. In one setting, the compensating thermostat could go on for much longer than the other setting before shutting off.

How high does the atmosphere extend from the earth

Answers

The atmosphere extend from the Earth up to  10,000 km.

What is atmosphere?

An atmosphere is the layers of gases surrounding a planet Earth. It's atmosphere is composed of about 78% nitrogen, 21% oxygen, and other gases.

Earth's atmosphere has five major layers. From lowest to highest, the layers are the troposphere, stratosphere, mesosphere, thermosphere and exosphere.

The exosphere is the topmost layer of Earth's atmosphere . It extends from the end of thermosphere, about 700 km above sea level, to about 10,000 km.

Thus, the atmosphere extend from the Earth up to  10,000 km.

Learn more about atmosphere

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The exosphere is the outermost layer of Earth's atmosphere (i.e. the upper limit of the atmosphere). It extends from the exobase, which is located at the top of the thermosphere at an altitude of about 700 km above sea level, to about 10,000 km (6,200 mi; 33,000,000 ft) where it merges into the solar wind.

What is the difference between a meteorite and a asteroid?

Answers

What's the DiDifference Between Asteroids & MeteoritesBy Karen S. Garvin, eHow ContributorSharePrint this articleAsteroids can become meteorites if they fall to Earth.Both asteroids and meteorites originate in outer space. Asteroids are small planet-like bodies that orbit the sun, and known as planetoids or minor planets. The asteroid belt that lies between Earth and Mars contains hundreds of thousands of these planetoids. Sometimes asteroids fall out of orbit and hit the Earth, and then they become meteorites. However, not all meteorites are asteroids, and meteorites may be from the Moon or another planet.Other People Are ReadingThe Characteristics of Comets, Meteors & AsteroidsWhat Kind of Sediment Is a Piece of Meteorite?AsteroidsAsteroids are small rocky bodies that orbit the sun. Between Mars and Jupiter is the asteroid belt, thought to be a planet that broke apart. Asteroids are inactive, which means they do not have ongoing geologic processes, such as plate tectonics or active volcanoes. An asteroid can become a meteorite if it escapes from orbit and collides with Earth.MeteoritesMeteorites are meteoroids that have impacted the Earth's surface. A meteorite may in fact originate as an asteroid, but meteorites can also come from outside of the solar system. These rocky extraterrestrials can be iron, iron compounds, or stone. Iron meteorites comprise only about 10 percent of all meteorites and contain nickel, which tells scientists they are from outer space.Sponsored Links3D Ground/Earth ScannersGraphical Measuring Results. No Need For A Computer-Get A Quote Nowokm-emirates.com/GroundScannerThe Makeup of Asteroids and MeteoritesScientists once thought asteroids and meteorites consisted of the same materials: stone and iron compounds. However, spectral analyses showed a difference in the reflectance patterns between asteroids and meteorites. It turns out that space weathering, caused by the flow of high-energy ions and small particles, erodes the surface of an asteroid by vaporizing it, and then depositing a layer of film that makes the surface appear dark red. Common meteorites do not have this discoloration.Why Scientists Study AsteroidsScientists study the asteroid belt to gain an understanding of the formation of our solar system and its planets. Asteroids within the asteroid belt between Mars and Jupiter consist of melted minerals. Asteroids from the outer solar system tend to be carbon. The largest asteroid in our solar system is Ceres, which is 580 miles in diameter.The Asteroid MenaceMost asteroids occupy the asteroid belt and orbit the sun in an elliptical orbit. However, some follow different orbits that may bring them into close proximity to Earth. Some scientists believe an asteroid impact caused the extinction of the dinosaurs about 65 millions years ago. Some scientists worry that another asteroid could hit the Earth and wreak havoc on our planet.fference Between an Asteroid and a Meteor?
Asteroids are a rocks which are a part of asteroid belt in our solar system. Sometimes these asteroids get deflected from their paths and attracted towards earth. When the rocks enter earth's atmosphere, they get burnt due to friction with atmosphere. Some asteroids are large enough and get burnt only partially and reach earth's surface. The rocks which reach the earth's surface are called meteorites.

A dolphin leaps out of the water at an angle of 36.6° above the horizontal. The horizontal component of the dolphin's velocity is 7.87 m/s. Calculate the magnitude of the vertical component of the velocity.

Answers

Answer:

Explanation:

Given

Dolphin leaps out an angle \theta =36.6^(\circ)

Horizontal component of dolphin velocity u_x=7.87\ m/s

Suppose u is the launch velocity of dolphin

therefore u\cos \theta =u_x---1

and vertical velocity u_y=u\sin \theta ----2

divide 1 and 2 we get

\tan \theta =(u_y)/(u_x)

u_y=u_x\tan \theta

u_y=7.87\cdot \tan (36.6)

u_y=5.84\ m/s

Suppose that at room temperature, a certain aluminum bar is 1.0000 m long. The bar gets longer when its temperature is raised. The length l of the bar obeys the following relation: l=1.0000+2.4×10−5T, where T is the number of degrees Celsius above room temperature. What is the change of the bar's length if the temperature is raised to 14.1 ∘C above room temperature?

Answers

Answer:

0.00034 m

Explanation:

Since the length of the aluminium bar, L is given by , L = 1.0000 + 2.4 × 10⁻⁵T and T = 14.1°C, we substitute the value of T into L. So, we have L = 1.0000 + 2.4 × 10⁻⁵ × 14.1°C = 1.0000 + 0.0003384 = 1.0003384 m. The change in length is thus 1.0003384 - 1.0000 = 0.0003384 m ≅ 0.00034 m
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