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Frequency of 220 Hertz is used to measure the speed of passing cars. When at rest by the side of the road, an approaching car reflects sound wave back to you, and you found the frequency increased by 32 hertz. Find what is the speed of the car? (Speed of sound 343 m/s)
you live on a busy street but as a music lover you want to reduce the traffic noise. if you install special
The hydraulic piston/cylinder system has a cylinder diameter D = 0.1 meter with a piston and rod mass of 25 kg. The road has a diameter of 0.01 m with an outside atmospheric pressure of 101 KPa. The inside hydraulic pressure is 250 KPa. How large a f..
A person pulls a toboggan for a distance of 30-m along the snow with a rope directed 25.0° above the snow. The tension in the rope is 98-N.
Find the minimum volume of concrete (y = 23.6 kN/m3) needed to keep the gate (1 m wide) in a closed position; l = 2 m. Note the hinge at the bottom of the gate. Explain briefly.
Skater A, mass 55.0 kg, moving at 14.0 m/s bumps into stationary Skater B, mass 65.0 kg. After the collision, Skater A moves at an angle of 53.1o from her original direction, What are the final speeds of the two skaters
A 40.0 m long uniform bridge span weighs 6.00 x 104N. What force do the bridge and the car exert on the left pier
An iron casting containing a number of cavities weighs 16967.7 N in air and 13515.2 N in water. What is the total volume of all the cavities in the casting
A skater of mass 74.5 kg initially moves in a straight line at a speed of 4.80 m/s. what is the skater's final velocity
One cubic meter of water flowing over Niagara Falls in New York drops 83.7 meters. how much heat energy would the water have
The tortoise can run with a speed of 0.1 m/s and the hare can run with a speed of 2 m/s. They start their race at the same time, but the hare, feeling confident, stops along the way for a two minute nap, and the tortoise wins by the length of his ..
An object is placed 9.30 cm in front of the cornea. he image formed by the cornea serves as an object for the lens. Treat the lens as a thin lens 7 mm behind the cornea. Find the optical power of the lens necessary to form an image on the retina
how fast do you need to hit a block that is resting on a surface with 1n friction force with a 0.5kg hammer in order to
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