What is the SI unit of electric current?VoltOhmAmpereWattC) AmpereThe ampere (A) is the SI unit of electric current, measuring the flow of electric charge. A volt measures potential difference, an ohm measures resistance, and a watt measures power.
Which law states that "for every action, there is an equal and opposite reaction"?Newton's First Law of MotionNewton's Second Law of MotionNewton's Third Law of MotionLaw of Universal GravitationC) Newton's Third Law of MotionNewton's Third Law of Motion is a fundamental principle of physics that states that if an object exerts a force on a second object, the second object exerts an equal and opposite force on the first.
What is the process of a solid turning directly into a gas without passing through the liquid phase?MeltingCondensation SublimationEvaporationC) SublimationSublimation is the transition of a substance directly from the solid to the gas state, without first becoming a liquid. A common example is dry ice (solid carbon dioxide) turning into gas.
What is the name of the force that keeps planets in orbit around the Sun? Magnetic force Centrifugal forceElectrostatic force Gravitational forceD) Gravitational forceGravity is the fundamental force of attraction that exists between any two objects with mass. It is the force that holds the planets in their orbits.
The bending of light as it passes from one medium to another is called:ReflectionRefraction DiffractionDispersionB) RefractionRefraction is the change in direction of light (or other waves) as it passes from one medium to another, caused by its change in speed.
What is the unit of measurement for frequency?NewtonHertzPascal JouleB) HertzThe hertz (Hz) is the unit of frequency, defined as one cycle per second.
What principle explains why a ship floats on water?Pascal's Principle Archimedes' PrincipleBernoulli's PrincipleNewton's Law of GravitationB) Archimedes' PrincipleArchimedes' Principle states that the upward buoyant force exerted on a body immersed in a fluid is equal to the weight of the fluid that the body displaces.
What is the main characteristic of a superconductor?It has very high electrical resistance.It has zero electrical resistance below a critical temperature.It can only conduct electricity at room temperature.It has a very high melting point. B) It has zero electrical resistance below a critical temperature.Superconductivity is a phenomenon characterized by a loss of all electrical resistance in certain materials when they are cooled below a characteristic temperature.
The sound waves with frequencies below the audible range for humans are called:SupersonicHypersonicUltrasonicInfrasonic D) Infrasonic Infrasonic waves are sound waves with frequencies below 20 Hz, which is the lower limit of human hearing.
What does the law of conservation of energy state?Energy can be created but not destroyed.Energy can be destroyed but not created. Energy can be converted from one form to another but cannot be created or destroyed.The total energy of a system is always zero.C) Energy can be converted from one form to another but cannot be created or destroyed.The law of conservation of energy states that the total energy of an isolated system remains constant; it is said to be conserved over time.
The process of a liquid changing to a gas at a temperature below its boiling point is called:CondensationEvaporation MeltingFreezing B) EvaporationEvaporation is a type of vaporization that occurs at the surface of a liquid as it transitions into the gas phase.
What is the unit of electric current?VoltOhmAmpere Watt C) AmpereThe ampere (A) is the SI unit of electric current, defined as the flow of electric charge.
According to Ohm's law, the voltage across a conductor is directly proportional to the:ResistanceCurrentPower Energy B) Current Ohm's law states that the voltage (V) across an ideal resistor is proportional to the current (I) flowing through it, where the constant of proportionality is the resistance (R), expressed as V = IR.
What is the phenomenon of light changing direction as it passes from one medium to another called?ReflectionDiffraction RefractionInterferenceC) RefractionRefraction is the change in direction of a wave, such as light, as it passes from one medium to another with a different density.
The law of conservation of energy states that energy: Can be created but not destroyed. Can be destroyed but not created.Can be created and destroyed.Can neither be created nor destroyed.D) Can neither be created nor destroyed.The law of conservation of energy, also known as the first law of thermodynamics, states that the total energy of an isolated system remains constant; it can only be transformed from one form to another.
The law of conservation of energy states that energy: Can be created but not destroyed. Can be destroyed but not created.Can neither be created nor destroyed, but can be transformed from one form to another. Can be created and destroyed.C) Can neither be created nor destroyed, but can be transformed from one form to another.The law of conservation of energy is a fundamental principle in physics stating that the total energy of an isolated system remains constant.
What is the SI unit of electrical resistance?AmpereVoltOhm WattC) OhmThe Ohm is the SI unit of electrical resistance, named after the German physicist Georg Ohm.
What is the unit of measurement for force?JouleNewtonWattPascalB) NewtonA Newton is the SI unit of force, named after Sir Isaac Newton in recognition of his contributions to classical mechanics.
Which of the following describes the behavior of light as it passes from one medium to another and changes direction?ReflectionRefractionDiffraction AbsorptionB) Refraction Refraction is the change in direction of light as it passes from one medium to another with a different density.
The SI unit of power is the:Joule Newton WattPascalC) WattThe watt is the SI unit of power, equivalent to one joule per second.
Which of the following is a property of a convex lens?It diverges light rays.It converges light rays.It has a negative focal length. It forms only virtual images.B) It converges light rays.A convex lens is thicker in the middle and thinner at the edges. It converges parallel rays of light to a single focal point.
The First Law of Thermodynamics is also known as the law of conservation of:Mass MomentumEnergyCharge C) EnergyThe First Law of Thermodynamics states that energy cannot be created or destroyed, only transferred from one form to another.
The process of an object moving in a circle at a constant speed is known as:Linear motionUniform circular motionProjectile motionOscillatory motion B) Uniform circular motionUniform circular motion describes the motion of an object traveling at a constant speed along a circular path.
The SI unit of length is the:Gram MeterKilogramSecondB) MeterThe meter is the SI unit of length.
Which of Newton's Laws of Motion states that "for every action, there is an equal and opposite reaction"?First Law Second LawThird LawLaw of Universal Gravitation C) Third LawNewton's Third Law of Motion states that when two bodies interact, they apply forces to one another that are equal in magnitude and opposite in direction.
Which of the following is the SI unit of power?NewtonJoule Watt Pascal C) WattThe Watt (W) is the SI unit of power, which measures the rate at which work is done or energy is transferred.
Ohm's Law states the relationship between:Force, Mass, and Acceleration. Pressure, Volume, and Temperature.Voltage, Current, and Resistance.Energy, Mass, and the Speed of Light. C) Voltage, Current, and Resistance.Ohm's law states that the current through a conductor between two points is directly proportional to the voltage across the two points. The constant of proportionality is the resistance.
What is the SI unit of length?Kilogram MeterSecondCandelaB) MeterThe meter (m) is the base unit of length in the International System of Units.
Which of the following is an example of a scalar quantity?VelocityDisplacementSpeedAcceleration C) SpeedA scalar quantity is one that has magnitude but no direction. Speed is a scalar, while velocity is a vector.
What is the SI unit of energy?WattJouleNewton PascalB) JouleThe Joule (J) is the SI unit of energy, work, and the amount of heat.
Archimedes' Principle is used to explain:The motion of planets.The relationship between voltage, current, and resistance.The buoyancy of an object in a fluid.The expansion of gases.C) The buoyancy of an object in a fluid.Archimedes' Principle states that the upward buoyant force exerted on an object submerged in a fluid is equal to the weight of the fluid that the object displaces.
What is the SI unit of frequency?SecondNewtonWattHertzD) HertzThe Hertz (Hz) is the SI unit of frequency, defined as one cycle per second.
Newton's Law of Universal Gravitation states that every particle in the universe attracts every other particle with a force that is: Directly proportional to the product of their masses. Inversely proportional to the product of their masses.Directly proportional to the distance between them.Inversely proportional to the square of their masses. A) Directly proportional to the product of their masses.The law states that the force is directly proportional to the product of their masses and inversely proportional to the square of the distance between them.
What is the SI unit of power?JouleNewtonWattPascalC)WattThe Watt (W) is the SI unit of power, which is the rate at which energy is transferred or used.
The SI unit of electric current is: Volt OhmAmpereWattC) Ampere The Ampere (A) is the SI base unit of electric current, named after André-Marie Ampère.
The principle of "conservation of energy" states that energy can neither be created nor destroyed, but can be:Only converted from one form to another.Created from mass. Created from heat.Converted from one form to another, and also destroyed.A) Only converted from one form to another.The Law of Conservation of Energy is a fundamental principle of physics, stating that the total energy of an isolated system remains constant.
What is the SI unit of temperature?CelsiusFahrenheit KelvinJouleC) KelvinThe Kelvin (K) is the SI base unit of temperature.
Ohm's Law states the relationship between:Pressure, volume, and temperature.Force, mass, and acceleration.Voltage, current, and resistance.Velocity, distance, and time. C) Voltage, current, and resistance.Ohm's Law states that the current through a conductor between two points is directly proportional to the voltage across the two points.
What is the SI unit of length? InchFootMeter KilometerC) Meter The meter (m) is the SI base unit of length.
The phenomenon of light bouncing off a surface is called: RefractionDiffractionReflectionAbsorptionC) ReflectionReflection is the change in direction of a wavefront at an interface between two different media, bouncing the wavefront back into the original medium.