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A lead ball is dropped from a height of 5.0m above a lake. It hits the water with its final free fall velocity and maintains that velocity as it sinks to the bottom. If it reaches the bottom of the lake in 5.0s after it was dropped, how deep is the lake?
LC oscillators havebeen used in circuits connected to loudspeakers to create some ofthe sounds of electronic music. which is in the audible range of frequencies
In a mall, a shopper rides up an escalator between floors. At the top of the escalator, the shopper turns right and walks 11.72 m to a store. At what angle is the escalator inclined above the horizontal
The atomic planes in a crysral are spaced d = 0.50 nm apart. These planes are used in a diffraction experiment with X-rays with ? = 0.05 nm. What are the diffraction angles for the first three bright fringes
An electric car accelerates for 11 s by drawing energy from its 270-V battery pack. Find the minimum power rating of the car
A model rocket is constructed with a motor that can provide a total impulse of 29.0 N·s. The mass of the rocket is 0.250 kg. What is the speed that this rocket achieves
A pile driver is a device used to drive stakes into the ground.While building a fence, How far is the stake driven to into the ground on the first stroke
A 374-kg sailboat has an acceleration of 0.643 m/s2 at an angle of 58.9 ° north of east. find the direction of the net force that acts on the sailboat
A bucket filled with water exerting a force of 529N is hanging from a rope that is wound around a 0.05 m radius stationary cylinder. If cylinder does not rotate and the bucket hangs straight down, what is the magnitude of torque the bucket produce..
A compund microscope has an objectibe lens with a 2.2 cm focal length and an eyepiece with a 5.4 cm focal length. what magnification does the microscope produce
Estimate how many electrons there are in your body.(my approxmass is 7.94 kg) Make any assumptions you feel are necessary, butclearly state what they are
A wire 2.45 m long carries a current of 19.2 A and makes an angle of 48.8° with a uniform magnetic field of magnitude B = 1.18 T. Calculate the magnetic force on the wire
A circular loop in the plane of a paper lies in a 0.85 T magnetic field pointing into the paper. The loop's diameter changes from 20.5 cm t0 5.6 cm in 0.55 s, What is the magnitude of the average induced emf
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