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If a Car of mass 1200kg traveling at 28m/s is brought to a complete stop in 4 seconds after the brakes lock the wheels. Find the average frictional force exerted on the car.
If the radius of the equipotential surface of a point charge is 21.0m and is at a potential of +3.50kv
As you get ready for your early morning physics class, you comb your hair in front of a planar mirror. How far away from you is your image
A 1800 kg car traveling to the right at28 m/s is chasing a second car of the samemass that is traveling to the right at 10 m/s. If the two cars collide and stick together, what is their speed just after the collision
A 10-turn square coil of wire lies in the xy-plane. A uniform magnetic field of magnitude 2.0 T oriented in the negative z-direction, what is the magnitude of the induced emf in the coil during this time
A telephoto lens with focal length of 123 mm has f-numbers ranging from f/2.8 to f/22. What is the diameter of the lens aperture at the second f-number
radium is a radioactive element whose nucleus emits an alpha particle a helium nucleus that has a kinetic energy of
A kid sits in a sled on a horizontal snowy surface. The combined mass of the kid and the sled is 34 kilogram. Find how much total mechanical work (J) did you do as you pulled the sled and kid 20 meter
The left face of a bioconvex lens has a radius of curvature of 10.3 cm, and the right face has a radius of curvature of 15 cm. Calculate the focal length of the lens
in a velocity selector the uniform magnetic field of 1.5 t is produced by a large magnet. two parallel plates with a
Consider 1 mol an ideal gas at 30oC and 1.04 atm pressure. To get some idea how close these molecules are to each other, on the average, What is the length of an edge of each cube
How do mass and length affect the period of a simple pendulum? What were the effects of mass and of length on the period
A 1200-kg cannon shoots a 28-kg shell at an angle of 25° above the horizontal and a speed of 470 m/s. What is the recoil velocity of the cannon
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