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Q. The car in the drawing is moving to the left at 35 m/s. The car's horn continuously emits a 2.20 ? 102 Hz sound. it shows the first two regions of compression of the emitted sound waves. The speed of sound is 343 m/s. How far does the car move in one period of the sound emitted from the horn?
Q. A car is traveling at 27 m/s when the driver spots a large pothole in the road a distance 44 m ahead. She immediately applies her brakes. If her acceleration is -9.7 m/s2, does she manage to stop before reaching the pothole?
A converging lens has a focal length of f = 29 cm. If an object is placed 40 cm from the lens, where will the image be formed.
How many joules of kinetic energy does a 750-{rm kg} automobile travelling at the typical highway speed of 65 {rm{ mi/h}} have.
A 253 kg log is pulled up a ramp by means of a rope that is parallel to the surface of the ramp. The ramp is inclined at 30.0° with respect to the horizontal.
What is angular velocity of the cockroach-disk system
What is the decibel level required for human perception
A hydrometer is used to measure the specific gravity of liquids. For a sure liquid a hydrometer reading indicates a specific gravity of 1.15. What is the liquid's density and specific weight? State the answer in SI units.
The pulley system is used to lift a 61 kg crate. Note that one chain connects the upper pulley to the ceiling and a second chain connects the lower pulley to the crate. The crate is rising with an acceleration of 2.4 m/s2. Assume the masses of the ch..
find out the magnitude of an acceleration
A battery having an emf of 11.10 V delivers 102 mA when connected to a 61.0 load. Find out the internal resistance of the battery.
Problem on a hare and a tortoise battle
The angular momentum of Earth is constant
Elucidate the spacing between peaks
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