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A violinist is tuning the A string on her violin by listening for beats when this note is played simultaneously with a tuning fork of frequency 440 Hz. She hears a beat frequency of 4 Hz. She notices that, when she increases the tension in the string slightly, the beat frequency decreases. What was the frequency of the mistuned A string?
Throughout three hours one winter afternoon, when outside temperature was 9° C, a house heated by electricity was kept at 21° C with the expenditure of 46kwh (kilowatt•hours) of electric energy.
q1. a 59-g ice cube at 0degc is heated until 52 g has become water at 100degc and 7.0 g has become steam at 100degc.
In compressing the spring in a toy dart gun, 0.9 J of work is done. When the gun is fired, the spring gives its potential energy to a dart with a mass of 0.05 kg, What is the dart's speed
In a typical game of squash, two people hit a soft rubber ball at a wall until they are about to drop due to dehydration and exhaustion.
A van is moving with a constant acceleration, a0, up a hill that makes an angle ? with the horizontal. what is the acceleration of the van
A golf ball of mass 0.045 kg is hit off the tee at a speed of 33m/s. Find the average force exerted on the ball by the golf club
A concave mirror has a focal length of 20 cm. What is the position (in cm) of the resulting image
A 0.6410-kg ice cube at -12.40°C is placed inside a chamber of steam at 365.0°C. Later, you notice that the ice cube has completely melted into a puddle of water.
The Mars rover was deployed on the surface of Mars in July 1997. At one point during its subsequent mission, How far was Mars from the from Earth at that time
You're an optometrist, mounting a projector at the back of your 4.2m -long exam room, 2.6m above the floor. At what height should you center the pattern on the wall
A muon is created at the top of Mount Nanga Parbat (height 8,100 m) and travels at constant speed to sea level, what is the height of Mount Nanga Parbat
questiona high-speed flywheel in a motor is spinning at 450 rpm when a power failure rapidly occurs. a flywheel has
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