Ch 2 Basic Physics For Radiography

What is the basic unit of energy in the metric system?

• Joule (J)

• Watt (W)

• Volt (V)

• Newton (N)

Answer explanation

The basic unit of energy in the metric system is the Joule (J). It quantifies energy, work, or heat, making it the correct choice among the options provided.

Tags

NGSS.MS-PS3-5

What is the unit of frequency used in describing electromagnetic waves?

• Decibel (dB)

• Watt (W)

• Hertz (Hz)

• Tesla (T)

Answer explanation

The unit of frequency for electromagnetic waves is Hertz (Hz), which measures cycles per second. Other options like Decibel (dB), Watt (W), and Tesla (T) refer to different physical quantities.

Tags

NGSS.HS-PS4-1

True or False: X-rays and gamma rays are both forms of electromagnetic radiation.

• True

• False

Answer explanation

True. X-rays and gamma rays are both forms of electromagnetic radiation, differing mainly in their origin and energy levels, but they share the same fundamental properties of electromagnetic waves.

Tags

NGSS.HS-PS4-3

NGSS.HS-PS4-4

What is the relationship between wavelength and frequency in the electromagnetic spectrum?

• Direct

• Inverse

• Constant

• Exponential

Answer explanation

Wavelength and frequency are inversely related in the electromagnetic spectrum. As the wavelength increases, the frequency decreases, and vice versa, following the equation: speed = wavelength × frequency.

Tags

NGSS.HS-PS4-1

What is the primary difference between X-rays and gamma rays?

• Speed

• Mass

• Origin

• Charge

Answer explanation

The primary difference between X-rays and gamma rays is their origin. X-rays are produced by electronic transitions in atoms, while gamma rays originate from nuclear reactions or radioactive decay.

Tags

NGSS.HS-PS4-4

What type of energy is stored in a compressed spring?

• Chemical energy

• Nuclear energy

• Potential energy

• Kinetic energy

Answer explanation

A compressed spring stores potential energy due to its position. When released, this energy can be converted into kinetic energy as the spring returns to its original shape.

Tags

NGSS.MS-PS3-2

What is kinetic energy?

• Energy of rest

• Energy stored in chemical bonds

• Energy of motion

• Energy in atoms' nuclei

Answer explanation

Kinetic energy is defined as the energy of motion. It is the energy an object possesses due to its movement, distinguishing it from other forms of energy like potential energy or chemical energy.

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

In radiography, which form of energy is directly responsible for producing an image?

• Electrical energy

• Kinetic energy of electrons

• Nuclear energy

• Potential energy

Answer explanation

In radiography, images are produced by the kinetic energy of electrons. When electrons collide with a target, their kinetic energy is converted into X-rays, which create the radiographic image.

Tags

NGSS.MS-PS2-3

NGSS.MS-PS4-1

True or False: As the wavelength of X-rays increases, their energy also increases.

• True

• False

Answer explanation

False. The energy of X-rays is inversely related to their wavelength; as the wavelength increases, the energy decreases. Therefore, longer wavelengths correspond to lower energy.

Tags

NGSS.HS-PS4-1

Which type of energy is responsible for X-ray production in the X-ray tube?

• Thermal energy

• Nuclear energy

• Kinetic energy

• Chemical energy

Answer explanation

Kinetic energy is responsible for X-ray production in the X-ray tube. When electrons are accelerated and collide with the target material, their kinetic energy is converted into X-rays.

Tags

NGSS.MS-PS3-5