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A 2.50-kg Pendulum is attatched to a string 11.4m stringis pulled aside until it is.386m above its lowest position and released. The pendulum is designed to emit sound waves at a frequency of 440 Hz; However, as it swings toward and away from an observer, the frequency appears to vary slightly. What is this Phenomenon called? What would be the apparent frequency of the sound from the pendulum as it swings at its maximum speed toward an observer? Assume the speed of sound is 345 m/s.
q1. a horizontal uniform bar of mass 2.6 kg and length 3.0 m is hung horizontally on two vertical strings. string 1 is
A semitrailer is coasting downhill along a mountain highway when its brakes fail. What was the truck's initial speed
Unpolarized light with I=120 w/m^2 travels in the x direction and passes through a linearly polarizing film oriented in the z direction, What is the final intensity of the beam passing through all three polarizing films
A firecracker in a coconut blows the coconut into three pieces. Two pieces of equal mass fly off south and west, What is the speed and direction of the third piece
Consider a wooden block of density 750 kg/m3 and volume 3.0 m3. What force is required to hold it completely under water
A 86.6-kg sprinter exerts a force of 100 N on the starting block at an angle of 30 with respect to the ground. The horizontal acceleration of the sprinter is
q1. at a factory a noon whistle is sounding with a frequency of 491 hz. as a car travelling at 78 kmh approaches the
A charged paint is spread in a very thin uniform layer over the surface of a plastic sphere of diameter 12.0 cm, find the electric field just inside the paint layer
A charge +q is at the origin. A charge -2q is at x = 9.10 m on the +x axis. (a) For what finite value of x is the electric field zero? (b) For what finite values of x is the electric potential zero? (Note: Assume a reference level of potential V =..
A 188.0 g piece of lead is heated to 81.0oC and then dropped into a calorimeter containing 692.0 g of water that initally is at 21.0oC.
During a front-end car collision from 46.5 km/h and with air bags inflated, the acceleration limit for the chest is 60g as the car comes to rest. What force in newtons does the air bag exert on the chest of a 75.5 kg person
A rope exerts a constant horizontal force of 250N to pull a 60 Kg crate across the floor.
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