# Physics Exam 1

 What are the dimensions of volume? L^3 What are the dimensions of velocity? distance/time What is an order-of-magnitude estimate? A rough estimate made by rounding off all numbers to one significant figure and its power of ten, and after the calculation is made, only one sig fig is kept. A scalar quantity is defined as A quantity that is specified by a numerical value only A vector quantity is defined as A quantity that is specified  by using both a numerical value and a direction The position, x, of an object is given by the equation x=A + Bt + C , where t refers to time. What are the dimensions of A, B, and C? Distancedistance/time At a given instant, the acceleration of a particle is zero, this means that... The velocity is not changing at that instant The area under a curve in a velocity versus time graph gives displacement A stone is thrown straight up. When it reaches its highest point, its velocity is ___ and acceleration is ___ ZeroNot zero The horizontal component of the velocity of a projectile does what during the entire trajectory? Remains constant For a projectile launched horizontally, the vertical component of the velocity... Continuously increases For which value of Θ is the height of a projectile fired from ground level a maximum? 90° above horizontal For which value of Θ is the range of a projectile fired from ground level a maximum? 45° above horizontal Equation for average speed distance/time Equation for average acceleration How do you find instantaneous velocity? Slope of tangent line Distance equation for circle 2(pi)r If acceleration is constant, velocity changes linearly in the equation: Equation for average velocity Equation of position as a function of time Equation of velocity as a function of position How many cubic cm in a liter? 1000 cm³ A parabola that has a negative slope but is curving down... Indicates speeding up because the slopes of the tangent lines at each point are getting more negative and increasing in magnitude A parabola that has a negative slope but is curving up... Indicates slowing down because the slope of the tangent lines at each point are getting less negative thus, decreasing in magnitude. Distance equation as a function of speed: Height equation Displacement in x direction x=dcosθx= Displacement in y direction y=dsinθ Percent error equation Equation for magnitude Equation for angle of direction θ Definition of deceleration Velocity and acceleration have opposite signs Definition of range Horizontal distance a projectile travels Authorsmittykitty ID348615 Card SetPhysics Exam 1 Descriptionphysics Updated2019-09-17T21:15:39Z Show Answers