PHYSICS HIGH SCHOOL

In a motor, the combined effect of electric currents and magnetic forces turn electrical energy into which of the following? A. A battery

B. A generator

C. Mechanical energy

D. Electromagnetic energy

Answers

Answer 1
Answer: When you turn on a ceiling fan it turns the electrical energy that is running into the motor in the fan into motion. This motion is described as Mechanical energy. Therefore your answer would be C mechanical energy.

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A group of physics teachers is taking some time off for a little putt-putt golf. The 15th hold has a large metal rim that putters must use to guide their ball towards the hole. Mr S guides a golf ball around the metal rim. When the ball leaves the rim, which path (1,2 & 3) will the golf ball follow and why?
Which is occurring when work is being done? energy is being reverted. energy is being decreased. energy is being increased. energy is being transferred.?

The hottest objects with temperatures in the millions of Kelvins, give off most of their radiation in which part of the electromagnetic spectrum? The hottest objects with temperatures in the millions of Kelvins, give off most of their radiation in which part of the electromagnetic spectrum? radio visible X-ray gamma ray ultraviolet

Answers

Answer:

The hottest objects with temperatures in the millions of Kelvins, give off most of their radiation in the form of X-rays and gamma rays.

Explanation:

The electromagnetic (EM) spectrum contains radio waves, microwaves, infrared light, visible light, ultraviolet light, X-rays and gamma-rays. All these different types of radiation are made up of photons having specific wavelengths and different amounts of energy. In the EM spectrum, the photons of radio waves have the lowest energy and the energy of photons increases through microwaves, infrared, visible light, ultraviolet, X-rays, and the photons of gamma-rays have the highest energy (the energy of photons is measured in electron volts).

All warmer objects such as stars, planets, etc emit photons having a specific range of wavelengths and it depends on the surface temperature of those objects. The very hot objects with temperatures in the millions of Kelvins or more mainly emit photons with shorter wavelengths, such as gamma rays and X-rays while cooler objects emit radiation such as infrared or radio waves, having longer wavelengths.

The ultraviolet radiation has the energy in the range of a few electron volts to about 100 eV. The energy of X-ray photons is in the range of 100 eV to 100 keV and the energy of gamma-rays is greater than 100 keV. The nuclear explosions, radioactive decay, the hottest and most energetic objects in the universe such as neutron stars, supernova explosions, etc produce gamma rays.

Objects with temperatures in the millions of Kelvins emit most of their radiation in the X-ray and gamma-ray parts of the electromagnetic spectrum.

Objects with temperatures in the millions of Kelvins primarily give off most of their radiation in the X-ray and gamma-ray parts of the electromagnetic spectrum. As an object's temperature increases, the wavelengths of radiation it emits become shorter. This phenomenon is described by Wien's displacement law.

At lower temperatures, such as those found on Earth or in stars like our Sun, objects emit most of their radiation in the visible and infrared parts of the spectrum. However, as temperatures rise to millions of Kelvins, the emitted radiation shifts to shorter wavelengths, eventually falling into the X-ray and gamma-ray regions.

In the X-ray and gamma-ray parts of the electromagnetic spectrum, radiation has extremely high energy and short wavelengths. These types of radiation are associated with the very high temperatures and intense energy found in extremely hot objects, such as the cores of massive stars, supernovae, and certain high-energy astrophysical phenomena. Scientists use X-ray and gamma-ray telescopes to study these extreme environments and the radiation they emit.

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Suppose you have two magnets. Magnet A doesn't have its poles labeled, but Magnet B does have a clearly labeled north and south pole. If these two are brought into contact with one another, which of the following could you expect? A. The side of Magnet A that's attracted to Magnet B's north pole must be Magnet A's north pole.
B. The side of Magnet A that's repelled by Magnet B's south pole must be Magnet A's north pole.
C. The side of Magnet A that's attracted to Magnet B's south pole must be Magnet A's north pole.
D. The side of Magnet A that's repelled by Magnet B's north pole must be Magnet A's south pole

Answers

Like poles of 2 magnets Repel each other and unlike poles attract each other. so the answer would be C. the side of magnet A that's attracted to Magnet B's South pole must be Magnet A's North pole.
The right answer here would be option C - the side of Magnet A that's attracted to Magnet B's south pole must be Magnet A's north pole. This is due to the magnetic rule of opposites attracting.

Calculate the force between one grapefruit as described above and Earth. Earth has a mass of5.9742 × 1024 kg and a radius of 6.3710 × 106 meters. Assume the grapefruit is resting on Earth’s surface.

Answers

the formula is G=mass(1)x mass(2)
                         -------------------------------
                         6.67x10x-11

note that 10x-11 is in standard form but i could not write it. It is 10 raised to power negative 11

What’s the kinetic energy of the object? Use .Erica is competing in the shot put event at a track meet. She hurls a shot with a mass of 4 kilograms at a speed of 9 meters/second. The shot’s kinetic energy is joules.

Answers

The kinetic energy of an object varies directly with the square of the speed of an object. The required kinetic energy of the shot is f 162 J.

What is Kinetic Energy?

The energy possessed by an object by its motion is known as the object's kinetic energy. It depends on the speed and mass of the given object.

Given data -

The mass of shot put is, m = 4 kg.

The speed of shot put is, v = 9 m/s.

The mathematical expression for the kinetic energy of the shot put is,

KE = (1)/(2) m v^(2)

Solving as.

KE = (1)/(2) * 4 * 9^(2)\n\nKE = 162 \;\rm J

Thus, we can conclude that the required kinetic energy of the shot is of 162 J.

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Answer:

We have: K.E. = mv² / 2

here, m = 4 Kg

v = 9 m/s

Substitute their values into the expression:

K.E. = (4)(9)² / 2

K.E. = (4)(81) / 2

K.E. = 324 / 2

K.E. = 162 Joules

Explanation:

In short answer: it would be K.E.=162 Joules

The energies of two photons you might detect emitted by hydrogen atoms are 10.2 and 2.1 eV. Which photon has the longest wavelength? A.) the 10 eV photonB.) They both have the same wavelength
C.) the 2.1 eV photon

Answers

Answer: C

Explanation: it is C

When in orbit, a satellite such as the space shuttle isa. simply a projectile.
b. in non-accelerated motion.
c. free from Earth's gravity.

Answers

Answer: B

Explanation:

When in orbit, a satellite is hold in position thanks to, between others, the earth's gravity. So the C option is discarded.

A projectile is an object thrown by the exertion of some force, like a bullet or a cannonball.

A satellite is placed in some orbit, so he can rotate the earth. The movement of the satellite is non-accelerated motion, because the only forces that act on the satellite are the forces that hold him in orbit.

Final answer:

When in orbit, a satellite such as the space shuttle is in non-accelerated motion and is influenced by Earth's gravity.

Explanation:

When in orbit, a satellite such as the space shuttle is in non-accelerated motion.

It is not simply a projectile because it is continuously under the influence of Earth's gravity.

However, it is not completely free from Earth's gravity as it continues to be pulled towards the Earth.

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