SAT Prep and SAT Practice Tests: August 2015

SAT Physics Practice Test: Waves

1. What is the wavelength of a 5 Hz wave that travels with a speed of 10 m/s?
(A) 0.25m
(B) O.5m
(C) 1m
(D) 2m
(E) 50m

2. A rope of length 5 m is stretched to a tension of 80 N. If its mass is 1 kg, at what speed would a 10 Hz transverse wave travel down die string?

(A) 2 m/s
(B) 5 m/s
(C) 20 m/s
(D) 50 m/s
(E) 200m/s

3. A transverse wave on a long horizontal rope with a wavelength of 8 m travels at 2 m/s. At t = 0, a particular point on the rope has a vertical displacement of +A, where A is the amplitude of the wave. At what time will the vertical displacement of this same point on the rope be -A?

(A) t = 1/8 s
(B) t = 1/4 s
(C) t = 1/2s
(D) t = 2 s
(E) t = 4s

4. What is the wavelength of a wave with period 2s and speed 2 cm/s?

(A) 0.25 cm
(B) 0.5 cm
(C) 1 cm
(D) 2 cm
(E) 4 cm

5. A string, fixed at both ends, supports a standing wave with a total of 4 nodes. If the length of the string is 6 m, what is the wavelength of the wave?

(A) 0.67 m
(B) 1.2 m
(C) 1.5 m
(D) 3 m
(E) 4 m

6. A string, fixed at both ends, has a length of 6 m and supports a standing wave with a total of 4 nodes. If a transverse wave can travel at 40 m/s down the rope, what is the frequency of this standing wave?

(A) 6.7 Hz
(B) 10.0 Hz
(C) 13.3 Hz
(D) 20.0 Hz
(E) 26.7 Hz

7. A sound wave travels through a metal rod with wavelength λ and frequency ƒ. Which of the following best describes the wave when it passes into the surrounding air?

Wavelength Freaueoey
(A) Less than λ Equal to ƒ
(B) Less than λ Less than ƒ
(C) Greater than λ Equal to ƒ
(D) Greater than λ Less than ƒ
(E) Greater than λ Greater than ƒ

8. In the figure below, two speakers, S₁, and S₂, emit sound waves of wavelength 2 m, in phase with each other.

Let A_P be the amplitude of the resulting wave at point P, and A_Q the amplitude of the resultant wave at point Q. How does A_P compare to A_Q?

(A) A_P < A_Q
(B) A_P = A_Q
(C) A_P > A_Q
(D) A_P < 0, A_Q > 0
(E) A_P and A_Q vary with time, so no comparison can be made.

9. An observe mice of sound waves.

By how much will the sound level decrease if the observer moves to a distance of 20 m ?

(A) 1dB
(B) 2dB
(C) 10 dB
(D) 18 dB
(E) 20 dB

10. An organ pipe that’s closed at one end has a length of 17 cm. If the speed of sound through the air inside is 340 m/s, what is the pipe’s fundamental frequency?

(A) 250 Hz
(B) 500 Hz
(C) 1,000 Hz
(D) 1,500 Hz
(E) 2,000 Hz

11. A bat emits a 40 kHz “chirp” with a wavelength of 8.75 mm toward a tree and receives an echo 0.4 s later. How far is the bat from the tree?

(A) 35 m
(B) 70 m
(Q 105 m
(D) 140 m
(E) 175 m

12. A car is traveling at 20 m/s away from a stationary observer. If the car’s horn emits a frequency of 600 Hz, what frequency will the observer hear? (Use v = 340 m/s for the speed of sound.)

(A) (34/36X600 Hz)
(B) (34/32X600 Hz)
(C) (36/34X600 Hz)
(D) (32/34X600 Hz)
(E) (32/36X600 Hz)

SAT Physics Practice Tests

SAT Physics Subject Test Pdf Download

SAT Physics Practice Test: Optics

1. What is the wavelength of an X-ray whose frequency is 1.0 x 10¹⁸Hz?

(A) 3.3 x 10^-11 m
(B) 3.0 x 10^-10 m
(C) 3.3 x lQ^-9 m
(D) 3.0 x 10^-8 m
(E) 3.0 x lO²⁶ m

2. In Young’s double-slit interference experiment, what is the difference in path length of the light waves from the two slits at the center of the first bright fringe above the central maximum?

(A) 0
(B) λ/4
(C) λ/2
(D) λ
(E) 3λ/2

3. A beam of light in air is incident upon the smooth surface of a piece of flint glass, as shown

If the reflected beam and refracted beam are perpendicular to each other, what is the index of refraction of the glass?

(A) 1/2
(B) 0.5√3
(C) √3
(D) 2
(E) 2√3

4, When green light (wavelength = 500 nm in air) travels through diamond (refractive index = 2.4), what is its wavelength?

(A) 208 nm
(B) 357 nm
(C) 500 nm
(D) 700 nm
(E) 1,200 nm

5. A beam of light traveling in medium 1 strikes the interface to another transparent medium, medium 2. If the speed of light is less in medium 2 than in medium 1, the beam will

(A) refract toward the normal
(B) refract away from the normal
(C) undergo total internal reflection
(D) have an angle of reflection smaller than the angle of incidence
(E) have an angle of reflection greater than the angle of incidence

6. If a clear liquid has a refractive index of 1.45 and a transparent solid has an index of 2.90 then, for total internal reflection to occur at the interface between these two media, which of the fallowing must be true?

at an angle
incident beam 　　　　of incidence
originates in　　　　　greater than

(A) the solid　　　　　30°
(B) the liquid　　　　　30°
(C) the solid 　　　　　60°
(D) the liquid　　　　　60°
(E) Total internal reflection cannot occur.

7. An object is placed 60 cm in front of a concave spherical mirror whose focal length is 40 cm. Which of the following best describes the image?

Nature of imaee　　 Distance from mirror
(A) Virtual　　　　 24 cm
(B) Real　　　　　　24 cm
(C) Virtual 　　　　120 cm
(D) Real　　　　　　120 cm
(E) Real　　　　　　240 cm

8. An object is placed 60 cm from a spherical convex mirror. If the mirror forms a virtual image 20 cm from the mirror, what’s the magnitude of the mirror’s radius of curvature?

(A) 7.5 cm
(B) 15 cm
(C) 30 cm
(D) 60 cm
(E) 120 cm

9. The image created by a converging lens is projected onto a screen that’s 60 cm from the lens. If the height of the image is 1/4 the height of the object,
what’s the focal length of the lens?

(A) 36 cm
(B) 45 cm
(C) 48 cm
(D) 72 cm
(E) 80 cm

10. Which of the following is true concerning a biconcave lens?

(A) Its focal length is positive.
(B) It cannot form real images.
(C) It cannot form virtual images.
(D) It can magnify objects.
(E) None of the above

SAT Physics Practice Test: Modern Physics

1. What’s the energy of a photon whose wavelength is 2.07 nm ?

(A) 60 eV
(B) 600 eV
(C) 960 eV
(D) 6,000 eV
(E) 9,600 eV

2. A metal whose work function is 6.0 eV is struck with light of frequency 7.2 x 10¹⁵ Hz. What is the maximum kinetic energy of photoelectrons ejected from the metal’s surface?

(A) 7 eV
(B) 13 eV
(C) 19 eV
(D) 24 eV
(E) No photoelectrons will be produced.

3. An atom with one electron has an ionization energy of 25 eV. How much energy will be released when the electron makes the transition from an excited energy level, where E= -16 eV, to the ground state?

(A) 9eV
(B) 11 eV
(C) 16 eV
(D) 25 eV
(E) 41 eV

4. The single electron in an atom has an energy of -40 eV when it’s in the ground state, and the first excited state for the electron is at -10 eV. What will happen to this electron if the atom is struck by a stream of photons, each of energy 15 eV ?

(A) The electron will absorb the energy of one photon and become excited halfway to the first excited state, then quickly return to the ground state, without emitting a photon.
(B) The electron will absorb the energy of one photon and become excited halfway to the first excited state, then quickly return to the ground state, emitting a 15 eV photon in the process.
(C) The electron will absorb the energy of one photon and become excited halfway to the first excited state, then quickly absorb the energy of another photon to reach the fast excited state.
(D) The electron will absorb two photons and be excited to the first excited state.
(E) Nothing will happen

5. What isthede Broglie wavelength of a proton whose linear momentum has a magnitude of 3.3 x 10^-23 kg·m/s ?

(A) 0.0002 nm
(B) 0.002 nm
(C) 0.02 nm
(D) 0.2 nm
(E) 2nm

6. The difference between the mass of an intact phosphorus-31 nucleus and the sum of the masses of its individual protons and neutrons is 0.2825 u. What is the nuclear binding energy per nucleon?

(A) 4.6 MeV/nucleon
(B) 6.3 MeV/nucleon
(C) 8.5 MeV/nucleon
(D) 12.1 MeV/nucleon
(E) 17.4 MeV/nucleon

7. Compared to the parent nucleus, the daughter of a β-decay has

(A) the same mass number but a greater atomic number
(B) the same mass number but a smaller atomic number
(C) a smaller mass number but the same atomic number
(D) a greater mass number but the same atomic number
(E) None of the above

8. The reaction

is an example of what type of radioactive decay?

(A) alpha
(B) β^-
(C) β⁺
(D) electron capture
(E) gamma

9. Tungsten-176 has a half-life of 2.5 hours. After how many hours will the disintegration rate of a tungsten-176 sample drop to its initial value?

(A) 5
(B) 8.3
(C) 10
(D) 12.5
(E) 25

10. What’s the missing particle in the following nuclear reaction?

(A) Proton
(B) Neutron
(C) Electron
(D) Positron
(E) Deuteron

11. What’s the missing particle in the following nuclear reaction?

(A) Proton
(B) Neutron
(C) Electron
(D) Positron
(E) Gamma

12. Two spaceships are traveling directly toward each other, one traveling at a speed of g and the other c/6 at a speed of c/3, as measured by observers on a nearby planet Hie faster ship emits a radar pulse directed toward the approaching ship. What is the speed of this radar pulse, as measured by observers on the planet?

(A) c/2
(B) 5c/6
(C) c
(D) 7c/6
(E) 3c/2

13. An Imperial battle cruiser, sitting in a hanger deck, is measured to have a length of 200 m by a worker on the deck. If the cruiser travels at a speed of (0.5*√3)c past a planet, what will be the length of the cruiser, as measured by the inhabitants of the planet?

(A) 50 m
(B) 87 m
(C) 100 m
(D) 173 m
(E) 400 m

14. An astronaut lives on a spaceship that is moving at a speed of 4c/5 away from the earth. As measured by a clock on the spaceship, the time interval between her maintenance checks on the ship’s main computer is 15 months. In the reference frame of the team here on Earth that monitors the ship’s progress, what is the time interval between maintenance checks on the ship’s main computer?

(A) 9 months
(B) 12 months
(C) 19 months
(D) 25 months
(E) 30 months

15. A particle whose rest energy is E is traveling at a speed of 12c/13. What is the particle’s kinetic energy?

(A) 7E/169
(B) 5E/13
(C) 3E/5
(D) 8E/5
(E) 13E/5

Saturday, August 29, 2015

SAT Physics Practice Test: Waves

SAT Physics Practice Tests

SAT Physics Subject Test Pdf Download

SAT Physics Practice Test: Optics

SAT Physics Practice Test: Modern Physics