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An ambulance emits a 400 Hz sound while standing at the fire station. A passenger in a car detects a frequency of 420 Hz while approaching the fire station. What is the speed of the passenger's car?
To stretch a certain spring by 2.20 from its equilibrium position requires 7.00 of work. What is the force constant of this spring
what is Spectroscopic and Photometric Parallaxes ? Define specific heat capacity and thermal capacity.
The mass of an object is 332 g, and its volume is determined to be 25 cc. What is the mass density of the object
A bottle has a mass of 27.00g when empty and 93.90g when filled with water. What is the specific gravity of this other fluid
a 0.40 kg mass attached to the end of a string swings in a vertical circle of radius 1.8 m. at an instant when the
Stainless steel has a young modulus' of 18*10^10 and a linear expansion of 17.3*10^-6. Determine what is the tension in the band when it cools to 37.0 c
You want to drop a bundle of all your class notes, quizzes, tests, worksheets, and term papers on the 50 yard-line of Lynn C. Find how long will it take for the bundle to reach the ground
A pulley system is used to lift a piano 3.4 m. The acceleration of gravity is 9.81 m/s2 . If a force of 2315 N is applied to the rope as the rope is pulled in 17 m, what is the efficiency of the machine
A vector has an x-component of -21.5 units and a y-component of 35.0 units. Find the magnitude and direction of the vector
The flywheel in a car is a solid cylinder with a mass of 100 kg, a radius of 12 cm, and a length of 5.0 cm. What is the kinetic energy of the cylinder
A weight of 200 N is hung from a spring with a spring constant of 2500 N/m and lowered slowly. How much will the spring stretch
A very long, straight solenoid with a cross-sectional area of 6.00cm2 is wound with 40.0 turns of wire per centimeter, What is the average induced emf in the secondary coil
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