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A car is traveling at 50 miles per hours. The driver sees a deer and hits the brakes. The car slows at 20 f/s^2. How long, in seconds, will it take the car to stop? How far will it go?
An object with a mass of 95 g displaces 755.9 ml of water when it is completely immersed. What is the buoyant force on the mass
A uniform rod of mass 3.20×10?2 and length 0.430 rotates in a horizontal plane about a fixed axis through its center and perpendicular to the rod. Two small rings, each with mass 0.190 , are mounted so that they can slide along the rod.
At what energy does an electron become "relativistic"? Consider electrons with kinetic energies of 50 eV, 50 keV, and 50 MeV. When is it important to use the relativistic formulas
A certain laser emits red light in a narrow band of wavelengths centered at 533.0 nm, What is the corresponding "frequency width" for the emission
A pendulum has a mass of 3.7 kg, a length of 1.7 meters, and swings through(half)arc of 28.1 degrees. What is its amplitude to the nearest centimeter? what is the total energy of the pendulum
A child in a boat throws a 5.20 kg package out horizontally with a speed of 10.0 m/s. Calculate the velocity of the boat immediately after, assuming it was initially at rest. The mass of the child is 26.0 kg and that of the boat is 40kg.
A projectile is launched with an initial speed of40.0 m/s at an angle of 35.0° above the horizontal. What is the projectile's velocity at the highest point of its trajectory
Using the Bohr model what is the radius of the electron orbit in the Hydrogen atom when the electron is in the n = 9 state? What is the energy of the Hydrogen atom
You are driving into St. Louis, Missouri, and in the distance you see the famous Gateway-to-the-West arch. how far (in kilometers) are you from the base of the arch
An electron and a proton move on concentric circular path in the plane of your paper, in a magnetic field that is perpendicular to the plane and is oriented towards you. Which particle follows the smaller circle
10-nC point charge is located at the center of a thin spherical shell of radius 8.0 cm carrying -20 nC distributed uniformly over its surface. What is the magnitude of the electric field 2.0 cm from the point charge
questiona 664-turn circular-loop coil 11.2 cm in diameter is initially aligned so that its axis isnbspparallel to
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