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A man drops a rock into a well. (a) The man hears the sound of the splash 2.0 s after he releases the rock from rest. The speed of sound in air (at the ambient temperature) is 336 m/s. How far below the top of the well is the surface of the water? I found the correct answer here. =18.4 (b) If the travel time for the sound is ignored, what percentage error is introduced when the depth of the well is calculated?
A block of mass 2.0 kg is pushed against a vertical wall by a horizontal push (P) of 50.0 N. Find the force AND the direction of the friction
An inverted cylindrical tube is immersed in water with 20.0 cm protruding from the surface, what will be the final pressure of the air
A very long, straight solenoid with a cross-sectional area of 6.15cm squared is wound with 50 turns of wire per centimeter, calculate the average induced emf in the secondary coil
Light has a wavelength of 550 nm in a vacuum. It then enters a medium of index of refraction 1.70, What is the frequency of this light in the vacuum, What is its frequency in the medium
With its wheels locked, a van slides down a hill inclined at 38.0 to the horizontal. Find the acceleration of this van if the hill is icy and frictionless
what is the electrostatic force that acts on this charge. What would be the least speed required for the rest of the trip to arrive in time for the interview.
A golf ball strikes a hard, smooth floor at an angle of 30 ° and, as the drawing shows, rebounds at the same angle. The mass of the ball is 0.047 kg, its speed is 45 m/s just before and after striking the floor. What is the magnitude of the impuls..
An object is placed in front of a concave mirror with a 21.4-cm radius of curvature. At what distance is the object from the mirror
A man begins pushing a box from rest up a ramp angled at 22 degrees from horizontal, exerting a constant force of 500N, with what average force will it hit the ground
a pitcher throws a horizontal fastball with a velocity of 34 m/s to the left. The batter hits the baseball horizontally to the right with a speed of 52 m/s. How much work is done on the baseball by the bat
A rock climber throws a small first aid kit to another climber who is higher up the mountain. FIND the vertical height difference between the two climbers
The transmission of electric power occurs at the highest possible voltage to reduce losses. If the voltage were raised by a factor of 9.3, by what factor would the power loss be reduced
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