MIAT Physics Practice Test

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• A machine converts 500 J of input energy into 320 J of useful output. What is its efficiency?
• Which statement about mass and weight is correct?
• What is dew point?
• A light ray travels from glass (n1 = 1.50) into air (n2 = 1.00) with an incidence angle of 40° relative to the normal. What is the refracted angle in air?
• What three things are necessary for the transmission and reception of a sound?
• What conditions must be satisfied for a rigid body to be in static equilibrium?
• Which of the following lists the five types of mechanical stress?
• Which statement correctly describes the relationship between mass and weight?
• In the standard sign convention for lenses, what is the sign of the image distance di for a real image?
• A resistor of 10 Ω is connected to a 12 V battery. What is the current?
• According to Dalton's law for gas mixtures, how is the total pressure P_total determined?
• Which are the three methods of heat transfer?
• A liquid has density 31.2 lb/ft^3; what is its specific gravity given water density 62.4?
• What is the expression for the centripetal acceleration a_c of an object moving with speed v on a circle of radius r, directed toward the center?
• Define the critical angle for total internal reflection.
• Which temperature scale uses absolute zero as its zero point and has degree intervals equal to Fahrenheit?
• Which expression represents Faraday's law of electromagnetic induction?
• A solid disk with mass 2 kg and radius 0.3 m has angular velocity ω = 20 rad/s. What is its rotational kinetic energy?
• A completely submerged cube of volume 0.0008 m^3 is placed in water (ρ ≈ 1000 kg/m^3). What is the buoyant force acting on it?
• Which of the following is not a type of mechanical stress?
• What is the formula for Density?
• A projectile is launched with speed 20 m/s at 30 degrees above the horizontal. What is the maximum height reached?
• In a hydraulic system with an input ram of diameter 0.75 inches carrying 100 lb, what is the approximate output force on a connected 2.0 inch diameter output ram (ideal hydraulics)?
• A mass m is raised by height h in a uniform gravitational field. What is the gravitational potential energy increase ΔU?
• What is the acceleration due to gravity on Earth?
• Which energy category includes energy due to position?
• Which law states that the total electric charge in an isolated system is conserved?
• In the fundamental standing wave on a string fixed at both ends, which statement is true?
• Two resistors 10 Ω and 30 Ω are in parallel across 60 V. What are the total current and the currents through each resistor?
• For an isothermal expansion with n = 2 mol, T = 300 K, Vf/Vi = 3, compute the work.
• If a material has density 62.4 lb/ft^3 and the density of water is 62.4 lb/ft^3, what is the specific gravity?
• If the temperature of a gas at constant volume doubles, what happens to its pressure?
• The Mach number is defined as the ratio of an object's speed to the speed of sound in the surrounding medium.
• What does the principle of superposition for waves state?
• Which temperature scale is an absolute scale that uses Fahrenheit-sized degrees?
• A block of mass 2 kg is pushed with 14 N on a horizontal surface where μk = 0.25. What is the resultant acceleration?
• For a sinusoidal wave, which relation describes how the intensity I depends on amplitude A?
• A constant horizontal force F acts on a mass m for time t starting from rest. Which expression gives the final velocity after time t?
• What is the basic formula for pressure when force and area are known?
• A liquid has SG 1.26; what is its density in lb/ft^3 (to two decimals)?
• A liquid has SG 0.90; given water density 62.4 lb/ft^3, what is its density?
• Which statement about heat transfer is true?
• A material has SG 1.40; what is its density in lb/ft^3?
• Energy required to raise 1 kg of water by 3°C?
• A liquid has density 93.6 lb/ft^3; what is its SG relative to water?
• The ratio of the speed of an airplane to the speed of sound is known as what?
• How does the period T of a simple pendulum depend on length L, assuming small oscillations?
• The impulse delivered to a particle equals the change in its momentum. If the velocity changes from v_i to v_f for a particle of mass m, which expression gives the impulse J?
• If SG equals 0.75, what is the density of the liquid in lb/ft^3?
• What is Density?
• If A2 = 26 square inches and P = 100 psi, what is F2?
• A liquid with SG 0.92; given water density 62.4, its density in lb/ft^3?
• Speed is defined as which of the following?
• A material has density 63.0 lb/ft^3. What is its SG to two decimals?
• A stretched string of length L = 2.0 m and wave speed v = 340 m/s supports a standing wave. What is the fundamental frequency?
• Which statement correctly describes the relationship between density and specific gravity?
• A spring with k = 50 N/m is compressed by x = 0.1 m. What is the potential energy stored?
• What is the unit of heat in the English system?
• What is the specific gravity of pure water as indicated by a hydrometer?
• A system absorbs 30 J of heat and does 60 J of work; what is the change in internal energy ΔU?
• Convert 0°C to Kelvin.
• In a conductor, which expression correctly relates current density J to the electric field E?
• What is the expression for the magnitude of the magnetic force on a moving charge?
• What is the speed of sound at standard sea level?
• Which statement expresses Ohm's law and identifies the unit of resistance?
• Two resistors 8 Ω and 2 Ω are in series across a 20 V source. What is the current, and the voltage across each resistor?
• In the English system, POWER is expressed in?
• In the photoelectric effect, what is the kinetic energy of the emitted electron when hf > φ?
• Two basic types of stress are?
• A projectile is launched with initial speed v0 at angle θ. The horizontal range on level ground is given by which expression?
• What is the condition for total internal reflection to occur when light travels from a denser medium to a rarer medium?
• Power is defined as?
• If two objects have the same weight but different volumes, the density is higher for the object with
• A person lifts a 15 kg mass with rope at constant speed. If the lifting speed is 0.5 m/s, what power is required?
• What is the critical angle for total internal reflection at a water-to-air interface? (n_water ≈ 1.33, n_air ≈ 1.00)
• A capacitor with C = 20 μF is charged to V = 10 V. What is the energy stored?
• What are the approximate speeds of sound in air at room temperature and in water?
• A radioactive sample has a half-life of 3 hours. After 6 hours, what fraction remains?
• Which equation gives the magnetic force on a moving charge?
• What is the average power of the lamp if it consumes 3600 J of energy in 60 s?
• What is the potential energy stored in the spring when stretched by 0.20 m?
• What are the SI units for absorbed dose and for equivalent dose in radiation protection?
• Using Snell's law, a light ray goes from air (n ≈ 1.00) into water (n ≈ 1.33) at 30° to the normal. What is the refracted angle in water?
• State Snell's law for refraction.
• In Bernoulli's equation, which term represents the kinetic-energy-per-unit-volume contribution?
• A photon with frequency 6.0×10^14 Hz has energy E. What is E in joules and in electronvolts? (h = 6.626×10^-34 J·s; 1 eV = 1.602×10^-19 J)
• A mass moves in a circle with speed v and radius r. If the radius doubles while the speed remains the same, what happens to the centripetal acceleration a_c = v^2 / r?
• A 1 mole of gas at STP is compressed to half its volume. By what factor does its pressure increase (assuming ideal gas behavior)?
• During a first-order phase transition at constant temperature, what happens to the energy supplied to the system?
• A 4 N force is applied to a 2 kg block moving 3 m with the force at 60 degrees to the displacement. What is the work done?
• Which expression represents Archimedes' buoyant force on a submerged object?
• Which principle states that the total electric charge in an isolated system remains unchanged?
• During a phase transition at constant temperature, how is energy typically accommodated?
• In the non-relativistic Doppler regime for light from an approaching source, the observed frequency f' is approximately which expression?
• Which statement correctly defines specific gravity?
• Define the efficiency η of a heat engine.
• What is weight?
• One of the biggest problems of hypersonic flight is?
• In a hydraulic system, small piston area A1 = 0.02 m^2 experiences F1 = 800 N. What is the output force F2 on a large piston with area A2 = 0.10 m^2?
• What kind of image is formed by a plane mirror?
• A capacitor with C = 10 μF is charged to V = 5 V. What is the energy stored?
• How many liters is one mole of an ideal gas at STP (1 atm, 0°C)?
• A liquid density 46.8 lb/ft^3; compute SG.
• What unit is atmospheric pressure measured in?
• Calculate the specific gravity of a substance with density 64 lb/ft^3 when the density of water is 62.4 lb/ft^3.
• In hydrostatics, what is the hydrostatic pressure at depth h in a fluid with density ρ?
• Which pair correctly matches a heat unit with its system?
• After 9 hours, what fraction remains for a sample with half-life 3 hours?
• For light in vacuum, what is the relationship between frequency f and wavelength λ?
• What are the units of the time constant τ in an RC circuit?
• Which statement correctly defines the electric field and its units?
• What is latent heat?
• A 5 kg block on a horizontal surface has kinetic friction with μk = 0.30. If a 20 N push is applied, what is the resulting acceleration? (Use g ≈ 9.8 m/s^2)
• A substance has density 49.3 lb/ft^3; water density is 62.4 lb/ft^3. What is its specific gravity (SG) to two decimals?
• During the same constant acceleration of 3.0 m/s^2 from rest, what is the velocity after 2.0 s?
• Which expression represents the first law of thermodynamics for a system where W is work done by the system?
• Which temperature scale is an absolute scale used widely in scientific measurements?
• What is the vertical component of the initial velocity for the projectile launched at 30 degrees with speed 20 m/s?
• In an RC circuit, which expression defines the time constant τ?
• Under standard conditions, surface atmospheric pressure is about how many pounds per square inch?
• In the photoelectric effect, what condition must be satisfied for electron emission?
• What is the SI unit of luminous intensity?
• What is the correct expression for the electric magnification m in terms of image distance di and object distance do?
• Why does a prism disperse white light into a spectrum?
• Two resistors 4 Ω and 6 Ω are in series across a 12 V source. What is the current, and the voltage across each resistor?
• Which of the following best describes a watt?
• Which equation gives the energy E of a photon in terms of its frequency f or wavelength λ?
• What is the density of water?
• What is Mass?
• What is power?
• A vertical spring with k = 100 N/m is stretched by x = 0.20 m. What is the force in the spring at that displacement?
• A completely submerged 0.0004 m^3 cube is placed in water (ρ ≈ 1000 kg/m^3). What is the buoyant force acting on it? (g ≈ 9.8 m/s^2)
• In the English system of measurement, WORK is expressed in?
• The coefficient of linear expansion α = 1.2×10^-5 /°C for a metal rod of length L0 = 2.0 m. If the temperature increases by ΔT = 40°C, what is the change in length ΔL?
• How does the refractive index n vary with wavelength in normal dispersion?
• How does the half-life t1/2 relate to the decay of the number of undecayed nuclei N?
• A mass of 0.5 kg moving at 9 m/s collides elastically with a stationary 0.5 kg mass. Compute final velocities.
• A car starts from rest and accelerates at 3.0 m/s^2 for 6.0 s. What is its final velocity?
• A photon has energy of 3 eV; work function of the material is 2 eV. What is the kinetic energy of the emitted electron (in eV)?
• Which device is used for measuring the specific gravity of liquids?
• If the length of a simple pendulum is quadrupled, how does the period change?
• A spring with spring constant k = 100 N/m is compressed by x = 0.2 m. What is the potential energy stored in the spring?
• What is differential pressure?
• Which statement correctly pairs a unit with what it measures?
• The specific gravity of gases is measured using what as its reference?
• With the same double-slit setup as above, what is the fringe spacing Δy for the m = 2 bright fringe?
• In a one-dimensional elastic collision between masses m1 and m2, the final velocities are given by which of the following expressions for v1f and v2f?
• Which energy category involves motion?
• Which statement best describes Newton's First Law of Motion?
• An electron has velocity v = 2.0×10^7 m/s. What is its de Broglie wavelength? (m_e = 9.11×10^-31 kg, h = 6.626×10^-34 J·s)
• A density of 52.0 lb/ft^3 corresponds to which SG value rounded to two decimals?
• A column of water 10 m tall exerts what pressure at the bottom? (ρ ≈ 1000 kg/m^3, g ≈ 9.8)
• For a reversible isothermal expansion of an ideal gas, the work done in terms of the initial and final volumes is which expression?
• What is the De Broglie relation between momentum p and wavelength λ?
• A 1.5 kg block on a frictionless horizontal surface is pulled by a 3 N constant horizontal force. What is the acceleration?
• An object with moment of inertia I = 0.15 kg·m^2 rotates with angular velocity ω = 10 rad/s. What is its angular momentum L?
• Sound intensity is measured in?
• A car accelerates from rest at 3.0 m/s^2 for 6.0 s. What distance does it travel in this interval?
• A long straight wire carries current I = 5 A. What is the magnetic field at r = 0.1 m? (μ0 = 4π×10^-7 T·m/A)
• For a fixed amount of gas, if pressure doubles while volume remains constant, what happens to temperature?
• A 1000 kg car rounds a level curve of radius 50 m at 15 m/s. What is the minimum coefficient of static friction to prevent slipping?
• Which expression gives the energy stored in an inductor in terms of inductance L and current I?
• The angular momentum L = I ω for a disk with I = 0.09 kg·m^2 and ω = 20 rad/s. What is L?
• Velocity is defined as which of the following?
• In a double-slit interference setup with L = 2.0 m, wavelength λ = 500 nm, slit separation d = 0.50 mm, what is the fringe spacing Δy for the m = 1 bright fringe?
• For a gas isothermal process with n = 2 mol, T = 300 K, Vi = 0.5 m^3 and Vf = 0.25 m^3, compute the isothermal work done by the gas (sign indicates work done by the gas).
• One calorie is equal to how many foot-pounds of work?
• Capacitance is defined by C = Q/V. Which of the following statements expresses this correctly?
• Bernoulli's principle for a streamline states that along a streamline, the sum of which terms is constant?
• The head of an aircraft rivet is loaded in?
• The de Broglie wavelength of an electron moving at 1.0×10^7 m/s is approximately what value? (m_e = 9.11×10^-31 kg)
• For the projectile described (20 m/s at 30 degrees), what is the time of flight ignoring air resistance?
• Convert 25°C to Kelvin.
• If the wavelength of a photon is halved, what happens to its energy?
• One BTU is equal to how many foot-pounds of work?
• During a reversible isothermal expansion of an ideal gas, which statement is true?
• The length of a metal rod after heating is 2.00096 m. Which of the following is the new length?
• What is the Carnot efficiency for a heat engine operating between Th and Tc?
• In a hydraulic system, if A1 = 3 square inches and F1 = 300 pounds, what is the pressure P?
• The speed at which just a portion of the air flowing over a wing goes supersonic is known as...
• What is the horizontal component of the initial velocity for the projectile launched at 30 degrees with speed 20 m/s?
• What is standard sea level atmospheric pressure?
• What determines the pitch of sound?
• Which inequality expresses the Heisenberg uncertainty principle for position x and momentum p?
• A coil stores energy E = 1/2 L I^2. If L = 0.5 H and I = 4 A, what is E?
• At constant pressure, what happens to the volume when the temperature doubles?
• In the metric system of measurement, WORK is expressed in?
• What is the optical power P of a lens with focal length f?
• A 2 kg mass is raised by 3 m. What is the increase in gravitational potential energy?
• Which statement describes Charles' law for a gas at constant pressure?
• What is the formula for mass?
• A 2 kg block is released from rest at height 5 m on a frictionless track. What is its speed at the bottom?
• In a horizontal pipe, cross-section A1 = 0.01 m^2 with speed v1 = 2 m/s flows into A2 = 0.04 m^2. What is v2 and the pressure difference P1 - P2 if ρ = 1000 kg/m^3?
• A wave travels at 300 m/s with a frequency of 50 Hz. What is its wavelength?
• A spring with constant k is compressed by x from its rest length. What is the potential energy stored U?
• When two waves of same frequency and phase travel along the same path, what type of interference occurs?
• A 60 W lamp is on for 60 seconds. How much energy is consumed?
• A head-on elastic collision occurs between m1 = 3 kg moving at u1 = 4 m/s and m2 = 1 kg at rest. What are v1 and v2?
• A 0.5 kg mass moving at 9 m/s has kinetic energy. Choose the correct value.
• State the relation among speed v, frequency f, and wavelength λ for a wave.
• A projectile is launched with speed 20 m/s at 30 degrees above the horizontal. What is its horizontal range?
• What is a Molecule?
• A door of width 0.90 m is opened with a horizontal force of 15 N applied at the edge. What torque is exerted about the hinge?
• If one horsepower is applied for one minute, how many foot-pounds of work are produced?
• Which statement about horsepower and watts is correct?
• For a particle moving under forces, which statement expresses the work-energy theorem?
• Acceleration is defined as which of the following?
• In a one-dimensional elastic collision, which quantities are conserved?
• Which statement best describes destructive interference?
• Which of the following is NOT a standard method of heat transfer?
• One horsepower is equal to how many watts, and how many foot-pounds per minute?
• Which unit is used to express work in the English system?
• Does sound travel faster in air or in water?
• Which law states that for every action there is an equal and opposite reaction?
• For a standing wave on a string of length L, what condition defines the fundamental mode relating L and the wavelength λ?
• A substance has density 78.4 lb/ft^3, with water density 62.4. What is its approximate SG?
• A light ray enters water (n = 1.33) from air (n = 1.00) and slows down. What is its speed in water?
• What is the kinetic energy of the 2 kg block at the bottom after sliding down 5 m on a frictionless track?
• Which equation expresses the ideal gas law for a gas with n moles?
• Which two classes of energy are there?
• What are the four temperatures scales?
• A spring with constant k is initially compressed by x from its rest length. If it is moved to twice that displacement (2x) from rest, by what factor does the stored potential energy increase?
• In a shear test, the shank is loaded in which mode?
• Sound intensity is determined by what?
• For an isothermal ideal gas with n = 1 mol at T = 300 K, Vi = 1 L, Vf = 2 L, compute the work done during expansion.
• In a hydraulic system, a small piston area A1 = 0.01 m^2 experiences a force F1 = 1000 N. What pressure is transmitted to the large piston area A2 = 0.10 m^2, and what is the resultant force F2 on that piston?
• A solid disk of mass 3 kg and radius 0.20 m has a constant torque of 0.60 N·m applied. What is its angular acceleration?
• What is the unit of heat in the Metric system?
• What is the cross-sectional area of a piston with diameter 0.75 inches?
• For a gas, if the specific gravity is less than 1, what does this indicate about the gas?
• Which equation correctly represents the thin lens equation relating object distance do, image distance di, and focal length f?
• What is the cross-sectional area of a piston with diameter 1.5 inches?
• Which equation gives the energy stored in a capacitor in terms of capacitance C and voltage V?
• What is Specific Gravity?
• An object is a solid disk with rotational inertia I = 0.09 kg·m^2 and angular velocity ω = 20 rad/s. What is its angular momentum?
• A constant force of 5 N acts along the direction of motion on a 2 kg block for 4 m on a frictionless surface. How much work is done?
• What is matter?
• Two resistors 4 Ω and 6 Ω are in parallel across a 12 V source. What is the total current, and the current through each resistor?
• If a 12 V battery is connected to a 6 Ω resistor, what is the current?
• The specific heat capacity of liquid water is about 4.18 kJ/(kg·K). How much energy is needed to raise 1 kg of water by 1°C?