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A vertical speaker, which can be viewed as a 30.0-cm gap, is playing a 1.20-kHz tone from the center of the stage, 10.0 m away from the first row of the seats. A listener in the first row tries to avoid the loud sound with sitting off the center of the row. Assuming that the speed of sound in the air is 343 m/s, how far from the center does she have to sit?
In 2.63 minutes, a ski lift raises four skiers at constant speed to a height of 147 m. What is the average power provided by the tension in the cable pulling the lift
a racetrack has the shape of an inverted cone. on this surface the cars race in circles that are parallel to the ground
When a lightning bolt strikes a lightning rod, its current istypically conducted to the ground by a ground rod. When the currentin the rod exceeds 20.0 kA, it can no longer be confined bythe rod and will arc laterally through the air to the ground..
the writing on the passenger-side mirror of your car says warning objects are closer than they appear. there is no such
A catapult on a cliff launches a large round rock towards a ship on the ocean below. calculate the horizontal distance D traveled by the projectile
a black of mass m sliding on a frictionless table is attached to a horizontal string that passes through a tiny hole in
an airplane undergoes the following displacements first it flies 87 km in a direction 40 east of north. next it flies
a meter stick balances at the 50.0-cm mark. if a mass of 50.0 g is placed at the 90.0-cm mark the stick balances at the
A rod of length L and charge Q is placed right next to another identical rod with charge -Q. What is the direction of the electric field at point P on the +y axis
The electric field everywhere on the surface of a charged sphere of radius 0.190 m has a magnitude of 585 N/C, What is the net charge on the sphere
The prong of the tuning fork moves back and forth when it is set into vibration. what is the frequency of the tuning fork
An ice chest at a beach party contains 11cans of soda at 6°C. Each can of soda has a mass of 0.34 kg and a specific heat capacity of 3900 J/(kg·°C).Someone adds a 6.3 kg watermelon at25°C to the chest
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