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True or False and why?1. Velocity of an object is zero at the same instant the acceleration is zero2 If an object is not accelerating, there are no forcesacting on it.3. It is possible for a particle moving at constantspeed to have constant acceleration4. You place a physics book on a table. Accordingto Newton's third law, the upward force of the table on the book isequal in magnitude and oppostie in direction to downward force ofgravity on the book.
A 0.800mm -diameter ball bearing has 2.50×109 excess electrons, What is the ball bearing's potential
A uniform disk has a mass of 4.6 kg and a radius of 0.2 m. The disk is mounted on frictionless bearings and is used as a turntable. What is the final angular momentum of the system
A microscope has an eyepiece of focal length 2.10 cm and an objective of focal length 4.10 cm. How far from the eyepiece is the image formed by the objective
A piñata of mass 3.50 kg is attached to a string tied to a hook in the ceiling. What is the work done by gravity by the time the string is in a vertical position for the first time
A cue ball (mass = 0.145 kg) is at rest on a frictionless pool table. The ball is hit dead center by a pool stick, which applies an impulse of +1.15 N · s to the ball. Find the velocity of the second ball just after it is struck
Perhaps to confuse a predator, some tropical beetles are colored byoptical interference that is due to scales whose alignment forms adiffraction grating, What is the grating spacing of the beetle
let ?1 and ?2 be the ground state and first excited state wave functions for a particle in a deep potential well of width L. calculate the uncertainty in momentum
A whistle of frequency 520 Hz moves in a circle of radius 80.0 cm at an angular speed of 12.0 rad/s. What are the lowest and highest frequencies heard by a listener a long distance away from the whistle and at rest with respect to the center of th..
A 7.11-kg box is sliding across the horizontal floor of an elevator. find the kinetic frictional force that acts on the box
A string 0.5 m long with mass density 0.0003 kg/m and is vibrating 200 cycles per second. What hanging mass would produce this tension
A major leaguer hits a baseball so that it leaves the bat at a speed of 28.0 m/s and at an angle of 35.3 degrees above the horizontal. Calculate the vertical component of the baseball's velocity
A small object is placed to the left of a convex lens and on it's optical axis. The object is 30 cm from the lens and has a focal length of 12 cm. Describe the nature of this image
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