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Unpolarized light is shone on a stack of 3 polarizers, What fraction of the initial intensity emerges from the stack
A disk-shaped merry-go-round of radius 2.63 m and mass 155 kg rotates freely with an angular speed of 0.763 rev/s, Calculate the initial and final kinetic energies for this system.
A 10.0g plastic ball is dropped from a height of 3.30m and is moving at 3.00m/s, How much mechanical energy was lost during the balls fall
A solenoid 70 . 8 cm long has 640 turns and a radius of 2 . 34 cm. If it carries a current of 2 . 03 A, find the magnetic field along the axis at its center
A negatively charged particle moving at 45 ? angles to both the y -axis and z -axis enters a magnetic field, What is the initial direction of deflection?
Imagine a very long, uniform wire that has a linear mass density of 0 . 0012 kg / m, What is the magnitude of the current in the wire that keeps it levitated just above the ground
When diving for prey, bald eagles can reach speeds of 200 mph (322 km/h). Suppose a 6.0kg eagle flying horizontally at 322 km/h suddenly grasps, What's the eagle's speed just after grasping the rabb
An object of interest is 3 mm from an objective for a compound microscope with a lens power of +250 D. what is the magnifying power of the eyepiece
Wildlife biologists fire 20-g rubber bullets to stop a rhinoceros charging at 0.81m/s. What impulse does each bullet deliver
An LR Circuit consist of an inductor with L = 2.50*10^-4 H and a resistor with R = 1.10 ohm connected in series to an oscililating source of emf. What is the phase angle of the current
The radius of our galaxy is 3 *10^20m, How much time would elapse on earth during the traversal
A ‘U' shaped pipe contains a liquid that is sealed at both ends by pistons. Determine the downward force
A 1290kg car and 4860kg truck undergo a perfectly inelastic collision. Before the collision, the car was traveling southward at 1.80m/s, Find the velocity of the wreckage immediately after the collis
A projectile of mass 1.8 kg approaches a stationary target body at 4.8 m/s. What is the magnitude of the momentum of the target body after the collision
A 0.10-kg cart traveling in the positive x direction at 10.0 m/s collides with a 0.30-kg cart at rest. What is the velocity of the 0.10-kg cart
A 0.2-kg steel ball is dropped straight down onto a hard, Determine the magnitude of the impulse delivered to the floor by the steel ball
A meterstick (L = 1 m) has a mass of m = 0.121 kg. Initially it hangs from two short strings: one at the 25 cm mark and one at the 75 cm mark. What is the tension in the left string?
A four-turn circular wire coil of radius 0.565 m lies in a plane perpendicular to a uniform magnetic field of magnitude 0.340 T. what is the average induced emf in the wire during this time
For a research project, a student needs a solenoid that produces an interior magnetic field of 0.0500 T. Determine the number of layers of wire needed
A positive point charge Q1 = 5.0*10-5 C is fixed at the origin of coordinates, Find the location(s) where the total electric field is equal to zero
A 26.0 kg satellite is in a circular orbit with a radius of 1.60×105 m around the planet Glob. Calculate the speed of the satellite. in m/s
A conducting rod slides down between two frictionless vertical copper tracks at a constant speed of 4.0 m/s perpendicular to a 0.50-T magnetic field, What is the mass of the rod?
A sphere of mass ofm= 1.40 kg is first placed directly on the plate of an electronic scale. The scale shows 13.73 N as the weight of the object. Calculate the density of the sphere
A pump is required to lift a mass of 780kg of water per minute from a well of depth 13.7m and eject it with a speed of 17.9m/s, What must be the power output of the pump
An object with a density of 901.0 kg/m3 and a mass of 895.0 kg is thrown into the ocean. Find the volume that sticks out of the water