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Questions in physics
📝 Answered - An electrical conductor is a material that easily allows electricity to flow through it. Which of these are examples of physical objects that are good conductors? A. Many metals like aluminum and steel B. Materials like rubber, plastic, and glass C. All of the above are good conductors
📝 Answered - A worker is being raised in a bucket lift at a constant speed of [tex]$3 ft / s$[/tex]. When the worker's arms are 10 ft off the ground, her coworker throws a measuring tape toward her. The measuring tape is thrown from a height of 6 ft with an initial vertical velocity of [tex]$15 ft / s$[/tex]. Projectile motion formula: [tex]$h=-16 t^2+v t+h_0$[/tex] [tex]$t=$[/tex] time, in seconds, since the measuring tape was thrown [tex]$h=$[/tex] height, in feet, above the ground Which system models this situation? A. [tex]$h=3 t+10$[/tex] and [tex]$h=-16 t^2+15 t+6$[/tex] B. [tex]$10 t +3$[/tex] and [tex]$h =-16 t ^2+6 t +15$[/tex] C. [tex]$-16 t^2+3 t+10$[/tex] and [tex]$h=-16 t^2+15 t+6$[/tex] D. [tex]$-16 t^2+10 t+3$[/tex] and [tex]$h=-16 t^2+6 t+15$[/tex]
📝 Answered - The surface of an ideal molecule of table salt (NaCl) is a square with a chemical structure as shown in the figure. The blue spheres represent Na ions and the green spheres represent Cl− ions. Consider only points A, B, C, and D. What is the magnitude of the net electrostatic force on the chlorine ion at point A due to the sodium ions at points B and C? Note: the bond length is 0.282 nm.
📝 Answered - Which item is the best example of a ground? A. Wiring that runs to and from a breaker box B. An extension cord C. A plastic handle on a tool D. A metal rod buried in the dirt
📝 Answered - An electric device delivers a current of [tex]$15.0 A$[/tex] for 30 seconds. How many electrons flow through it?
📝 Answered - Which item is the best example of a conductor? A. Rubber utility gloves B. An extension cord C. A plastic handle on a tool
📝 Answered - An electric device delivers a current of [tex]$15.0 A$[/tex] for 30 seconds. How many electrons flow through it?
📝 Answered - An electric device delivers a current of [tex]$15.0 A$[/tex] for 30 seconds. How many electrons flow through it?
📝 Answered - Which of the following is a device that interrupts an electric current when it detects a difference in the amount of current going to and returning from equipment along the circuit conductors? A. Insulation B. GFCI C. Conductor D. None of the above
📝 Answered - An electric device delivers a current of [tex]$15.0 A$[/tex] for 30 seconds. How many electrons flow through it?
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