Download Praxis - Physics Content Knowledge 5265 rated A and more Exams Nursing in PDF only on Docsity!
5265 rated A
Vector - correct answer ✅A quantity that has magnitude and direction (displacement, acceleration, force, momentum, velocity, current, etc.) Kinematics Equations - correct answer ✅ Pendulum Equation - correct answer ✅ Period Equations - correct answer ✅ Spring Potential Equation - correct answer ✅ Spring Force Equation - correct answer ✅ Circular Motion - correct answer ✅any motion in which an object is moving along a curved path (composed of centripetal, tangential, & angular acceleration) Centripetal Acceleration - correct answer ✅acceleration of an object toward the center of a curved or circular path Tangential Acceleration - correct answer ✅the instantaneous linear acceleration of an object directed along the tangent to the object's circular path
5265 rated A
Angular Acceleration - correct answer ✅the rate of change of angular velocity Angular Velocity - correct answer ✅rate of change of angular displacement, related to velocity (omega = velocity/radius) Galilean Transformation - correct answer ✅equations that translate measurements made in one frame of reference to another frame of reference without taking into account the theory of relativity Newton's Laws of Motion - correct answer ✅1. Law of Inertia - A body at rest persists in its state of rest, and a body in motion remains in constant motion along a straight line unless acted upon by an external force.
- A body's acceleration is directly proportional to the force exerted on it and is in the same direction as the force. (F=ma)
- To every action, there is an equal and opposite reaction. Atwood Machine - correct answer ✅ Static Equilibrium - correct answer ✅A condition where there are no net external forces acting upon a particle or rigid body and the body remains at rest or continues at a constant velocity. Friction Equation - correct answer ✅f = μN
5265 rated A
Simple Machines - correct answer ✅a machine with few moving parts, making it easier to do work (there are 6: lever, pulley, wheel and axle, inclined plane, wedge, and screw) Linear Momentum - correct answer ✅the product of the mass and velocity of an object Impulse - correct answer ✅the change of momentum of an object when the object is acted upon by a force for an interval of time (DeltaP=F*DeltaT) Conservation of Momentum - correct answer ✅momentum of a system remains constant when there are no net external forces acting on it Rotational Motion - correct answer ✅motion of a body that spins about an axis Center of Mass - correct answer ✅a point representing the mean position of the matter in a body or system Angular Momentum - correct answer ✅the quantity of rotation of a body, which is the product of its moment of inertia and its angular velocity Torque - correct answer ✅a force that causes rotation
5265 rated A
Moment of Inertia - correct answer ✅the opposition that the body exhibits to having its speed of rotation about an axis altered by the application of a torque (I=2mr^2/5 for solid sphere) Elastic Collision - correct answer ✅a collision between ideally elastic bodies in which the final and initial kinetic energies are the same (momentum & Ke are conserved) Inelastic Collision - correct answer ✅a collision in which the colliding objects become distorted, generate heat, and possibly stick together Newton's Universal Law of Gravitational - correct answer ✅ Satellites and Orbital Motion - correct answer ✅Satellites are projectiles that orbit around a central massive body instead of falling into it. Being projectiles, they are acted upon by the force of gravity - a universal force that acts over even large distances between any two masses. The motion of satellites, like any projectile, is governed by Newton's laws of motion Orbit Period - correct answer ✅the time required for a body to complete a single orbit Weight vs Mass - correct answer ✅mass is the quantity of matter and weight is the force of gravity upon that quantity
5265 rated A
(commonly carried by protons and electrons respectively). Like charges repel each other and unlike charges attract each other. (SI Unit= C (Coulomb), A*s) Induced Charge - correct answer ✅The charged object is never touched to the object being charged by induction. The charged object does not transfer electrons to or receive electrons from the object being charged. The charged object serves to polarize the object being charged. The object being charged is touched by a ground; electrons are transferred between the ground and the object being charged (either into the object or out of it). The object being charged ultimately receives a charge that is opposite that of the charged object that is used to polarize it. Coulomb's Law - correct answer ✅electric force between charged objects depends on the distance between the objects and the magnitude of the charges Electric Field - correct answer ✅An electric field is the physical field that surrounds electrically charged particles and exerts force on all other charged particles in the field, either attracting or repelling them. It also refers to the physical field for a system of charged particles. (V/m) (also, E=F/q) Electric Flux - correct answer ✅the electric field passing through a given area (flux=EAcostheta)
5265 rated A
Electric Potential Energy - correct answer ✅energy a charge has due to its location in an electric field Potential Difference (aka Voltage) - correct answer ✅is the external work needed to bring a charge from one location to another location in an electric field Conductors, Insulators, & Semiconductors - correct answer ✅the conductors (high conductivity) always conduct electric current while the insulators (low conductivity) do no conduct. however, semiconductor (moderate conductivity) conducts & blocks at different conditions. Material Conductivity Examples - correct answer ✅The common examples of conductors are Copper, Aluminium, Gold, Silver, etc. Silicon, Germanium, Arsenic are examples of Semiconductors. The examples for insulators include paper, rubber, plastic, etc. Electric Current - correct answer ✅a stream of charged particles, such as electrons or ions, moving through an electrical conductor or space Resistance - correct answer ✅A material's opposition to the flow of electric current. Ohms. (represented by Omega) Ohm's Law - correct answer ✅the current in a circuit equals the voltage difference divided by the resistance
5265 rated A
Capacitor - correct answer ✅a device used to store an electric charge, consisting of one or more pairs of conductors separated by an insulator Capacitance (In Series & In Parallel) - correct answer ✅ Inductance - correct answer ✅the property of a device that tells how effectively it induces an electromotive force (emf) in another device Inductor - correct answer ✅A coil of wire that creates a magnetic field when current passes through it (think solenoid) Direct Current (DC) - correct answer ✅Electrically charged particles flowing in one direction only Alternating Current (AC) - correct answer ✅electric current that reverses its direction of flow in a regular pattern Series Circuits - correct answer ✅having only one path through which current can flow; The same current flows through each part of a series circuit. The total resistance of a series circuit is equal to the sum of individual resistances. Voltage applied to a series circuit is equal to the sum of the individual voltage drops. Parallel Circuits - correct answer ✅electric circuits with two or more paths through which charge can flow; Voltage is equal
5265 rated A
across all components in a parallel circuit. The total circuit current is equal to the sum of the individual branch currents. Individual resistances diminish to equal a smaller total resistance rather than add to make the total. Parallel Circuits Equations - correct answer ✅
