Physical Science Worksheets Final

The product of the alpha decay of the uranium isotope 234 U 92 is

230 Th 90

A boat at anchor is rocked by waves whose crests are 50 m apart and whose speed is 10 m/s. These waves reach the boat once every

5 s

The product of the gamma decay of the strontium isotope 87 Sr 38

87 Sr 38

Two waves meet at a time when one has the instantaneous amplitude A and the other has the instantaneous amplitude B. Their combined amplitude at this time is

A + B

Which of the following is not a unit of energy?

Ampere-hour

The number of neutrons in a nucleus

Any of the above, depending on the nucleus

The image a camera lens forms on the film or sensor is

always real

The chemical behavior of an atom is determined by its

atomic number

A converging lens of focal length f produces a virtual image of a real object when the object is

closer than f from the lens

The bismuth isotope, 213 Bi 83 decays into the polonium isotope 213 Po 84 by

emitting an electron

the mass number of the nucleus

is the top corner number

You are looking at the bottom of a lake 1.2 m deep from a boat. To you the lake seems to be

less than 1.2 m deep

The greater the decibel (dB) level of a sound wave, the

louder it is

Enriched uranium contains

more 235 than natural uranium U

Of the following particles, the one with the smallest mass is the

neutrino

Of the following particles, the only one that is not stable outside an atom is the

neutron

When a nucleus undergoes radioactive decay, its new mass number is

never more than its original mass number

In an electromagnetic wave, the electric field is

perpendicular to BOTH the magnetic field and the wave direction

Which one of the following effects does not occur in all types of wave?

polarization

The sievert is a unit of

radiation dosage

As a sample of a radioactive nuclide decays, its half-life

remains the same

The setting sun appears red because its light is

scattered

Sound waves travel fastest in

solids

Protons and neutrons are held together to form nuclei by the

strong interaction

The strongest of the fundamental interactions is the

strong interaction

When a real object is the distance f from a converging lens,

the image is virtual, erect and larger than the object

A converging lens of focal length f produces a real image of a real object when the object is _____

- farther than f from the lens

The half-life of tritium is 12.5 years. If we start out with 1 g of tritium, after 25 years there will be

1/4 g of tritium left

Ocean waves with a period is 10 s are found to have a wavelength of 120 m. Their speed is ?

12 m/s

The musical note A has a frequency of 440 Hz and its wavelength in seawater is 3.5 m. The speed of sound in seawater is?

1540 m/s

The speed of light in a transparent plastic whose index of refraction is 1.5 is

2 x 10 (to the 8th) m/s

After 2 h has elapsed, one-sixteenth of the original quantity of a certain radionuclide remains undecided. The half-life of this radionuclide is

30 min.

A medal in a plastic cube whose index of refraction is 1.5 appears to be 20 mm below the upper surface of the cube. The depth of the medal is actually

30 mm

The helium isotope 6 He 2 undergoes beta decay with the emission of an electron. The product of the decay is

6 He 3

In a transverse wave, the individual particles of the medium move ?

Perpendicular to the direction of travel

A nucleus with too few neutrons for stability may decay radioactively with the emission of

a positron

The atomic number of a nucleus decreases when it emits

a positron

The wavelength of a sound wave is not related to its

amplitude

The nucleus of a helium atom is called

an alpha particle

Most known nuclides

are radioactive

If radium and chlorine combine to form radium chloride, the compound is

as radioactive as its radium content

The nucleus of an atom cannot be said to

be electrically neutral

A molecule of heavy water contains

deuterium atoms instead of an HYDROGEN atoms

Of the following, the highest index of refraction is found in

diamond

The bending of waves around the edge of an obstacle in their path is an example of

diffraction

Which of the following is not a property of an electromagnetic wave?

electric charge

When waves go from one place to another, they carry

energy

The property of light waves that leads to the phenomenon of color is

frequency

When a sound wave goes from air into water , the quantity that remains unchanged is its

frequency

Ultrasound refers to sound whose

frequency is too high for most people to hear

The electromagnetic waves emitted by a nucleus are called

gamma rays

A sound wave whose frequency is 50 Hz

has a relatively long wavelength

The wave of amplitude A interferes with another wave of the same kind with the same frequency whose amplitude is also A. The resulting wave

has an amplitude of 2A

The radiation dosage due to cosmic rays is greatest

in orbiting spacecraft

Relative to its object, a real image formed by a lens is always

inverted

The atomic number of the nucleus

is the bottom corner number

The number of neutrons in the nucleus

is the mass number minus the atomic number

The amplitude of a sound wave determines its

loudness

The atoms of the isotopes of a given element have the same number of

protons

The most important single source of radiation dosage received by an average person in the United States is

radon

The image the lens of the eye forms on the retina is

real and inverted

Light of which of the following colors has the longest wavelength?

red

An example of a purely longitudinal wave is a ?

sound wave

Of the following kinds of waves, the ones that cannot travel through a vacuum are

sound waves

Of the following kinds of waves, those that cannot be polarized are

sound waves

Dispersion is the term used to describe the

splitting of white light into its component colors in refraction

Sound waves of frequency 300 Hz have a speed relative to sound waves in the same medium of frequency 600 Hz that is

the same

The higher the frequency of a wave,

the shorter its wavelength

The atomic number and number of protons is the same

true

The unit which atomic masses are usually expressed is the

u

The image formed by a diverging lens of a real object is always which of the following?

virtual

To an astronaut in orbit around the earth the sky appears

Black

Light of which hot the following colors is scattered most in the atmosphere?

Blue

Light of which of the following colors has the highest frequency?

Blue

By far the most dangerous diagnostic x-rays in medicine are

CT scans