100% verified correct HESI A2 – Physics questions and answers

What is the SI unit of force? ️️ Newton What happens to acceleration when mass increases but force stays constant? ️️ Acceleration decreases What is the formula for velocity? ️️ Displacement divided by time What type of energy is stored in a stretched spring? ️️ Elastic potential energy What is the acceleration due to gravity on Earth? ️️ 9.8 m/s2 What happens to pressure when area decreases and force remains constant? ️️ Pressure increases What is the unit of power? ️️ Watt What is inertia? ️️ The tendency of an object to resist changes in motion What kind of motion is a falling object experiencing? ️️ Uniform acceleration What is kinetic energy dependent on? ️️ Mass and velocity What is the formula for work? ️️ Force multiplied by distance What is the unit of electric current? ️️ Ampere What does Ohm’s Law relate? ️️ Voltage, current, and resistance What happens to resistance when the length of a wire increases? ️️ Resistance increases What type of wave is light? ️️ Electromagnetic wave What is frequency? ️️ Number of waves passing a point per second What is the unit of frequency? ️️ Hertz What happens to wavelength when frequency increases? ️️ Wavelength decreases 2 What is the speed of light in a vacuum? ️️ 3.0 × 108 m/s What is refraction? ️️ Bending of light as it passes between media What is reflection? ️️ Bouncing of light off a surface What is the unit of energy? ️️ Joule What type of energy does a moving object have? ️️ Kinetic energy What is potential energy? ️️ Stored energy due to position What is momentum? ️️ Mass times velocity What happens to momentum in a closed system? ️️ It is conserved What is the unit of momentum? ️️ kg·m/s What is density? ️️ Mass per unit volume What happens to density if mass increases but volume stays the same? ️️ Density increases What is the unit of density? ️️ kg/m3 What is buoyancy? ️️ Upward force exerted by a fluid What happens when an object’s density is less than water? ️️ It floats What is temperature a measure of? ️️ Average kinetic energy of particles What is heat? ️️ Transfer of thermal energy What is conduction? ️️ Heat transfer through direct contact What is convection? ️️ Heat transfer through fluid movement What is radiation? ️️ Heat transfer through electromagnetic waves What is the unit of temperature in SI? ️️ Kelvin What happens to gases when temperature increases? ️️ They expand What is pressure in gases caused by? ️️ Collisions of particles 3 What is Boyle’s Law? ️️ Pressure and volume are inversely related What is Charles’s Law? ️️ Volume and temperature are directly related What is the unit of voltage? ️️ Volt What is electric power? ️️ Rate of energy transfer What happens when resistance increases in a circuit? ️️ Current decreases What is a conductor? ️️ Material that allows current flow What is an insulator? ️️ Material that resists current flow What is magnetic force? ️️ Force exerted by a magnetic field What is a magnet? ️️ Object that produces a magnetic field What happens when like magnetic poles meet? ️️ They repel What happens when opposite magnetic poles meet? ️️ They attract What is the unit of magnetic field strength? ️️ Tesla What is sound? ️️ A mechanical wave What medium does sound require? ️️ A material medium What happens to sound in a vacuum? ️️ It cannot travel What determines pitch? ️️ Frequency What determines loudness? ️️ Amplitude What is resonance? ️️ Amplification of vibrations What is the Doppler effect? ️️ Change in frequency due to motion What is acceleration? ️️ Rate of change of velocity What is Newton’s First Law? ️️ Objects remain at rest or in motion unless acted on What is Newton’s Second Law? ️️ Force equals mass times acceleration 4 What is Newton’s Third Law? ️️ Every action has an equal and opposite reaction What is friction? ️️ Force that opposes motion What happens to friction on rough surfaces? ️️ It increases What is terminal velocity? ️️ Constant speed when forces balance What is centripetal force? ️️ Force toward the center of circular motion What is gravitational force? ️️ Attraction between masses What happens to gravity with distance? ️️ It decreases