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A telephone cord is 9.00 m long andhas a mass of 0.500 kg. A transversewave pulse is produced by plucking one end of the taut cord. Thepulse makes four trips down and backalong the cord in 0.800 s. What is the tension in the cord?
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The wheel of a car has a radius of 0.360 m. The engine of the car applies a torque of 426 N·m to this wheel, What is the magnitude of the static frictional force
A van is approaching a stationary motion detector at 45 m/s. The motion detector emits ultrasonic sound waves toward the van, what is the frequency of the reflected sound measured by the detector
Ball 1, with a mass of 150 g and traveling at 15 m/s , collides head on with ball 2, which has a mass of 350 g and is initially at rest. What are the final velocities of each ball if the collision is perfectly elastic
A proton is accelerated from rest by a potential difference of 335 V. The proton enters a uniform magnetic field and follows a circular path of radius 25 cm. Determine the magnitude of the magnetic field. 1
Consider a regular hexagon of side length, L = 10cm. A charge, Q = 2µC, is located at each vertex, Find the electric field vector at the center
A car goes 13 miles east, then due North ending up 25 deg North of East from its initial position. How far due North did it travel
two parallel plates are separated by a distance of 25mm. the potential difference across the plates is 500v, what is the change in kinetic energy of the electron in electron volts
During a particular thunderstorm, the electric potential between a cloud and the ground is Vcloud - Vground = 2.0 x 108 V, with the cloud being at the higher potential. What is the change in an electron's potential energy when the electron moves from..
q1. a ball in flight is recorded and analyzed using digital video analysis software. the analysis produced the result
A 2.5 cm diameter metal sphere is glowing red, but a spectrum shows that its emission spectrum peaks at an infrared wavelength of 2.0 micrometers How much power does the sphere radiate
The component of the external magnetic field along the central axis of a 18-turn coil of radius 28.0 cm decreases from 1.90 T to 0.550 T in 2.10 s. What is the direction of the current
A converging lens (f1 = 24.0 cm) is located 56.0 cm to the left of a diverging lens (f2 = -28.0 cm). How far is the object from the converging lens
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