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Q1. Diffraction also occurs with sound waves. Consider 1900-Hz sound waves diffracted by a door that is 87 cm wide. What is the angle between the two first-order diffraction minima?
Q2. Two meteoroids are heading for earth. Their speed as they cross the moon's orbit is 2.3 km/s. The second meteoroid misses for earth by 2680 km. What is its speed at its closest point?
A 9200 kg boxcar traveling at 15.8 m/s strikes a second boxcar moving at 7.11 m/s in the same direction. What is the mass of the second car
If the height of the candies in the container increases at the rate of 0.29cm/s, at what rate (kilograms per minute) does the mass of the candies in container increase.
A rubber ball is dropped and bounces vertically from a horizontal concrete floor. If the ball has a speed of 2.9 m/s just before striking the floor and a speed of 2.0 m/s just after bouncing
After performing an experiment concerning charging a capacitor Sally noticed that the potential difference across the capacitor reached 2/3 of its final value after 18 seconds. find the time constant for the resistor-capacitor combination
A construct force vector F = 2.0i + 4.0j N acts on an object as it means along a straight- line path. If the object is displacement is d = 2.0i + 5.0j m calculate the work done by vector F
A fire truck connects their hose (radius r1 = 5 cm) to a fire hydrant. The underground water lines have a radius of r2 = 15 cm, How high above the end of the hose will the water reach
A sample contains 8.30×104 radioactive nuclei. In a time of 5 minutes, Evaluate the half life of the sample
Biological muscle cells can be thought of as nanomotors that use the chemical energy of ATP to produce mechanical work. How much work is done by such proteins
A 10-A current flows for two minutes. How much charge has passed through this circuit
A silver wire 2.6mm in diameter transfers a charge of 420C in 80minutes. Silver contains 5.8 free electrons per cubic meter. What is the current in the wire
a monkey pulls a box of bananas with mass 6.2 kg on a surface with a constant speed of 0.50 m/s. how much is the normal force on the box
A textbook of mass 2.09kg rests on a frictionless, horizontal surface. What is the moment of inertia of the pulley about its rotation axis
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