PHYS Straighterline Exam 2025–2026 Accurate
Real Exam Questions and Verified Correct
Answers
Which of the following statements is true for any completely enclosed ideal fluid? -
answer>>>Any change in pressure is transmitted equally to all points in the fluid.
Bernoulli's equation does not include the effects of . - answer>>>friction
When an asteriod that is headed directly for Earth is a distance of 8 Earth radii from
Earth's center, it has a speed of 15 km / s. What is the speed of the asteroid when it
collides with the Earth? Ignore any frictional effects of the atmosphere. The mass of the
Earth is 5.98 × 1024 kg and the Earth's radius is 6.37 × 106 m. - answer>>>18.3 km /
s
Tricia's giant jack-in-the-box, Jerry, has now come to life, and wants revenge on her.
While Tricia is away, Jerry devises a hydraulic press under Tricia's bed. The press allows
Jerry to apply 20 times the force on Tricia's bed that he applies to the piston on his side.
What is the ratio of the area of the piston on Jerry's side to the area of the piston under
the bed? - answer>>>1/20
When viewed from above, a particular var has an area A1. Each of its four tires holds a
pressure Pr and contacts the ground with an area of A2. If atmospheric pressure is Patm,
which of the following is the correct expression for the weight of the car? -
answer>>>4PrA2
A large asteroid is heading directly towards Earth on a collision course... If the missile
travels at a speed of 0.800c, what should the timer be set at so that the explosive
detonates just as the missile impacts the asteroid? Ignore gravitational effects. -
answer>>>334 s
In an isolated system, momentum is conserved. Which of the following is not equivalent
to the momentum conservation law? - answer>>>p = 0
,If the radius of a pipe carrying water is doubled, the volume flow rate of the
water . - answer>>>remains the same
Recently it was discovered that a planet with mass 1.3 × 1028 kg orbits the star 70
Virginis, which is 59 light years from the Earth. 70 Virginis has approximately the same
mass as the Sun, at 1.9 × 1030 kg. If the planet is in a nearly circular orbit of radius 7.1
× 1010 m what is the period of the planet in terms of Earth-days? - answer>>>122
days
If the radius of a pipe carrying water is doubled, the velocity of the water .
- answer>>>is quartered
A wave pulse is incident on the boundary between a heavy rope and a lighter cable, as
shown. Which of the following diagrams correctly illustrates the system a few moments
later? - answer>>>a) little up bump, big up bump
Because the energy in SHM alternates between kinetic and potential, at some position x,
the kinetic energy must be equal to the potential energy. For the general case, an object
undergoing SHM with an amplitude A, which of the following is this position? -
answer>>>A/root of 2
Which of the following best describes the relationship between two systems in thermal
equilibrium? - answer>>>None
An oscillating mass is connected to a horizontal spring with a spring constant k. The
force that the spring exerts on the mass is described by . - answer>>>−kx
The internal energy of an ideal gas depends on what? - answer>>>Its temperature
The exhaust temperature of a Carnot heat engine is 573 K. What is the intake
temperature if the efficiency of the engine is 30%? - answer>>>819 K
, A pulse of amplitude A travels on a string toward the end of the string that is free to move
vertically. The tension at the free end is maintained by tying the string to a ring of
negligible mass that is free to slide vertically on a frictionless post. Assume that there is
no transmission of the pulse into the pole and that the amplitude is in the upward
direction from the equilibrium position. Which of the following characteristics of the
reflected pulse is correct? - answer>>>non-inverted with amplitude A
An ordinary glass is filled to the brim with 350 cm3 of water at 100oC. If the temperature
decreased to 20oC, how much water could be added to the glass? Neglect the volume
expansion of the glass. (β water = 207 x 10-6/Co) - answer>>>5.80 cm3
The volume of a fixed mass of an ideal gas is doubled while the temperature is increased
from 100 K to 400 K. What is the final pressure in terms of its initial pressure Pi? -
answer>>>2 Pi
Suppose that 80 L of a gas has a gauge pressure of 2 atm and a temperature of 300 K.
How many molecules are there in the gas? (1 atm = 1.013 x 105 Pa , R = 8.314 J/(mol K),
NA = 6.022 x 1023) - answer>>>5.87 x 1024
Which of the following is the general solution of a damped oscillating system? -
answer>>>x(t)= Ae ^-bt/2m cos (wt +o)
As a copper wire is heated, its length increases by 1/10 of 1%. What is the change in
temperature of the wire? (αcopper = 16.6 x 10-6/Co) - answer>>>60.2oC
The temperature of a fixed mass of gas drops from 127oC to 27oC under constant
pressure. Find the ratio of the new volume to the original volume. - answer>>>3:4
A sinusoidal wave is traveling down a rope. In each of the following diagrams, a small
piece of the rope is shaded. All the pieces have the same length. In which diagram does
the shaded piece of rope have the least amount of energy? Neglect gravitational potential
energy - answer>>>little blue at top middle
Real Exam Questions and Verified Correct
Answers
Which of the following statements is true for any completely enclosed ideal fluid? -
answer>>>Any change in pressure is transmitted equally to all points in the fluid.
Bernoulli's equation does not include the effects of . - answer>>>friction
When an asteriod that is headed directly for Earth is a distance of 8 Earth radii from
Earth's center, it has a speed of 15 km / s. What is the speed of the asteroid when it
collides with the Earth? Ignore any frictional effects of the atmosphere. The mass of the
Earth is 5.98 × 1024 kg and the Earth's radius is 6.37 × 106 m. - answer>>>18.3 km /
s
Tricia's giant jack-in-the-box, Jerry, has now come to life, and wants revenge on her.
While Tricia is away, Jerry devises a hydraulic press under Tricia's bed. The press allows
Jerry to apply 20 times the force on Tricia's bed that he applies to the piston on his side.
What is the ratio of the area of the piston on Jerry's side to the area of the piston under
the bed? - answer>>>1/20
When viewed from above, a particular var has an area A1. Each of its four tires holds a
pressure Pr and contacts the ground with an area of A2. If atmospheric pressure is Patm,
which of the following is the correct expression for the weight of the car? -
answer>>>4PrA2
A large asteroid is heading directly towards Earth on a collision course... If the missile
travels at a speed of 0.800c, what should the timer be set at so that the explosive
detonates just as the missile impacts the asteroid? Ignore gravitational effects. -
answer>>>334 s
In an isolated system, momentum is conserved. Which of the following is not equivalent
to the momentum conservation law? - answer>>>p = 0
,If the radius of a pipe carrying water is doubled, the volume flow rate of the
water . - answer>>>remains the same
Recently it was discovered that a planet with mass 1.3 × 1028 kg orbits the star 70
Virginis, which is 59 light years from the Earth. 70 Virginis has approximately the same
mass as the Sun, at 1.9 × 1030 kg. If the planet is in a nearly circular orbit of radius 7.1
× 1010 m what is the period of the planet in terms of Earth-days? - answer>>>122
days
If the radius of a pipe carrying water is doubled, the velocity of the water .
- answer>>>is quartered
A wave pulse is incident on the boundary between a heavy rope and a lighter cable, as
shown. Which of the following diagrams correctly illustrates the system a few moments
later? - answer>>>a) little up bump, big up bump
Because the energy in SHM alternates between kinetic and potential, at some position x,
the kinetic energy must be equal to the potential energy. For the general case, an object
undergoing SHM with an amplitude A, which of the following is this position? -
answer>>>A/root of 2
Which of the following best describes the relationship between two systems in thermal
equilibrium? - answer>>>None
An oscillating mass is connected to a horizontal spring with a spring constant k. The
force that the spring exerts on the mass is described by . - answer>>>−kx
The internal energy of an ideal gas depends on what? - answer>>>Its temperature
The exhaust temperature of a Carnot heat engine is 573 K. What is the intake
temperature if the efficiency of the engine is 30%? - answer>>>819 K
, A pulse of amplitude A travels on a string toward the end of the string that is free to move
vertically. The tension at the free end is maintained by tying the string to a ring of
negligible mass that is free to slide vertically on a frictionless post. Assume that there is
no transmission of the pulse into the pole and that the amplitude is in the upward
direction from the equilibrium position. Which of the following characteristics of the
reflected pulse is correct? - answer>>>non-inverted with amplitude A
An ordinary glass is filled to the brim with 350 cm3 of water at 100oC. If the temperature
decreased to 20oC, how much water could be added to the glass? Neglect the volume
expansion of the glass. (β water = 207 x 10-6/Co) - answer>>>5.80 cm3
The volume of a fixed mass of an ideal gas is doubled while the temperature is increased
from 100 K to 400 K. What is the final pressure in terms of its initial pressure Pi? -
answer>>>2 Pi
Suppose that 80 L of a gas has a gauge pressure of 2 atm and a temperature of 300 K.
How many molecules are there in the gas? (1 atm = 1.013 x 105 Pa , R = 8.314 J/(mol K),
NA = 6.022 x 1023) - answer>>>5.87 x 1024
Which of the following is the general solution of a damped oscillating system? -
answer>>>x(t)= Ae ^-bt/2m cos (wt +o)
As a copper wire is heated, its length increases by 1/10 of 1%. What is the change in
temperature of the wire? (αcopper = 16.6 x 10-6/Co) - answer>>>60.2oC
The temperature of a fixed mass of gas drops from 127oC to 27oC under constant
pressure. Find the ratio of the new volume to the original volume. - answer>>>3:4
A sinusoidal wave is traveling down a rope. In each of the following diagrams, a small
piece of the rope is shaded. All the pieces have the same length. In which diagram does
the shaded piece of rope have the least amount of energy? Neglect gravitational potential
energy - answer>>>little blue at top middle
