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If she hears the rope hit the ground 5.31 seconds later, how deep is the pit? Assume the speed of sound in air 345.0 m/s.
A noisy grinding machine in a factory produces a sound intensity of 1.40 multiply.gif 10-3 W/m2. Calculate the decibel level of this machine
two forces F1 and F2 act a body of mass m on.If m=5.0 kg,F1=3.0 N and F2=4.0 N find the vector of acceleration of the body
an arrangement in which four disks are suspended by cords. The longer, top cord loops over a frictionless pulley, What are the masses of each disk
A straight object of length 3.6 cm lies along the central axis of a spherical mirror with focal length 9.2 cm. What is the length of its image in the mirror
A person walks 25.0 north of east for 3.10 km. explain how far would another person walk due north and due east to arrive at the same location?
A 16 kg wood ball hangs from a 2 m-long wire. The maximum tension the wire can withstand without breaking is 435 N. A 1.2 kg projectile traveling horizontally hits and embeds itself in the wood ball. What is the largest speed the projectile can ha..
If the initial speed of the ball is doubled, how does the maximum height change
1. a spring with negligible mass stretches 34.0 cm when a 144 g gram mass is suspended from it. now i suspend a mass
A rock is thrown off a 80.0 m limestone cliff at an angle of 38 degrees below the horizontal with an intitial velocity of 22.0m/s. What is the total time in flight
The magnetic flux that passes through one turn of a 18-turn coil of wire changes to 1.0 Wb from 9.0 Wb in a time of 0.092 s. What is the resistance of the wire
The front 1.20 m of a 1,350-kg car is designed as a "crumple zone" that collapses to absorb the shock of a collision. What is the magnitude of the average force on the car
A high fountain of water is located at the center of a circular pool, A student walks around the pool and estimates its circumference to be 196 m. How high is the fountain
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