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A person wears a hearing aid that uniformly increases the intensity level of all audible frequencies of sound by 33.5 dB. The hearing aid picks up sound having a frequency of 250 Hz at an intensity of 3.50 10-11 W/m2. What is the intensity delivered to the eardrum?
W/m2
Two electrons are fixed 2.6 cm apart. Another electron is shot from infinity and comes to rest midway between the two. What was its initial speed
Two children are playing a game. The rst throws a basketball straight up, and the second tries to hit it with a thrown baseball. What is the angular impulse on the basketball
Occasionally, huge icebergs are found floating on the ocean's currents. Suppose one such iceberg is 125 km long, 32.6 km wide, and 159 m thick. (a) How much heat in joules would be required to melt this iceberg (assumed to be at 0 °C) into liquid ..
What is the wavelength of the waves on the string?
Your spaceship lands on an unknown planet. To determine the characteristics of this planet, you drop a 1.30 kg wrench from 3.50 m above the ground, What is the mass of the planet
An object with mass 4.0kg is executing simple harmonic motion, attached to a spring with spring constant 300N/m, Calculate the amplitude of the motion
If it takes 3 golf balls to equal the mass of one tennis ball, what weight of tennis balls do you require equalling the number of golf balls in one kilogram of golf balls.
A uniform disk of mass 0.72 kg and radius 5.3 cm is mounted in the center of a 10 cm axle and spun at 717 rev/min. find the magnitude of the angular velocity of precession
A slide projector needs to create a 97 cm high image of a 2.0 cm tall slide, How far should you place the lens from the slide
A series AC circuit contains a resistor, an inductor of 200 mH, a capacitor of 5.20 µF, and a source with ?Vmax = 240 V operating at 50.0 Hz. The maximum current in the circuit is 180 mA.
q1. in a photoelectric effect experiment 325 nm photons strike a cathode that has a work function equal to 1.25 ev.
A uniform beam having a mass of 60 kg and a length of 2.8 m is held in place at its lower end by a pin. What is the magnitude of the force the pin exerts on the beam
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