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A mother pulls her daughter, whose mass is 22.1 kg and who is sitting on a swing with ropes of length 2.87 m, backward until the ropes make an angle of 31.1° with respect to the vertical. She then releases her daughter from rest. What is the speed of the daughter when the ropes make an angle of 13.3° with respect to the vertical?
A thin, horizontal copper rod is 1.20 m long, What is the minimum current in the rod that can cause it to float in a horizontal magnetic field of 2.45 T
Some athletes can put out as much as 800 watts in short bursts. If you could sustain such energy output long enough to reach the top of a mountain, how much time would it take you to get there from the valley, 3000 meters below the peak? So how does ..
A projectile is fired such that its horizontal range is equal to 2.0 times its maximum height. Find the angle the projectile was fired at
A current of 6.80 A is located at the origin. (This current flows parallel to the z axis, with a positive current flowing in the + k direction.) Find the magnetic field at a point 6.27 cm along the -x axis,
You are driving to grocery store at 21. You are 100 from an intersection when the traffic light turns red. Presume that your reaction time is 0.75 and that your car brakes with constant acceleration. How far from the intersection are you when you ..
A 720 nm light bean in air hits the flat surface of a certain plastic and the bean is split into a reflected ray and a refracted ray. what is the index of refraction of the plastic
A 2kg box slides along a frictionless surface with a speed of 15m/s and approaches a horizontal spring with a spring constant of 2000N/m. If one end is fixed, How far will the spring compress in stopping the box
a 12.0 g plastic ball is dropped from a height of 2.50 m, How much mechanical energy was lost during the balls fall
A ball attached to a string starts at rest and undergoes a constantangular acceleration as it travels in a horizontal circle of radius0.30m. What is the tangential acceleration of the ball
develop a hypothesis for how kernel color is inherited . the hypothesis should includea number of genes involvedb
Consider a generator with a 350 turn coil on its armature and a uniform magnetic field of 5.4 T. how fast do we need to rotate the coil
A disk of radius "r" and uniform surface charge density finalized_jax">\(\sigma\) spins with angular velocity %u03C9 about the y-axis
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