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A bullet is fired horizontally at 800 m/s and strikes a target that is 160 m from the gun. If the marksman hears the sound of the impact on the target 0.67 s after he fires the gun, what is the speed of sound?
A police car is moving towards you at a speed of 36.0 m/s. Its siren produces a frequency of 850 Hz. What frequency do you hear after it passes by you
Your refrigerator has a mass of 124.7 kg, including the food in it. It is standing in the middle of your kitchen, and you need to move it. The coefficients of static and kinetic friction between the fridge
What is EMF in the secondary circuit
The earth's magnetic field is approximately 30 microTesla. An AC transmission wire carries a current of 10 A (RMS). What is the peak current in the wire? What is the maximum force per meter in the wire?
Given: Mearth = 5.98 × 1024 kg Rearth = 6.37 × 106 m A satellite of mass 649 kg is in a circular or- bit at an altitude of 564 km above the earth’s surface. Because of air friction, the satellite eventually is brought to the earth’s surface, it hi..
The amplitude of a system moving with simple harmonic motion is doubled. The total energy will the be:
One way to measure on another planet or moon by remote sensing is to measure how long it takes an object to fall a given distance. A lander vehicle on a distant planet records the fact that it takes 3.17 for a ball to fall freely 11.26 , starting fro..
a block weighing 16.8 N, which can slide without friction on an incline at angle ? = 45.0°, is connected to the top of the incline by a massless spring of spring constant 125 N/m. With what period does it oscillate
A wire 6.70m long with diameter of 2.10mm has a resistance of 0.0250 ohm. Find the resistivity of the material of the wire
Through what angle in degrees does a 33 rpm record turn in 0.25 s? If the diameter of the record is 12 inches, what is the speed of the outer rim of the record
A 605 N woman climbs a staircase that rises at 47 degrees above the horizontal and is 4.70 m long. Her speed is a constant 40.0 cm/s. How much work has gravity done on her as she climbed the stairs
What minimum horsepower must a motor have to be capable to drag a 290 box along a level floor at a speed of 1.05 if the coefficient of friction is 0.50.
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