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Explain how flight is achieved. Please provide an example and use three concepts or laws to support your explanation and example.
a lens is made of a transparent material having an index of refraction of 1.5. one side of the lens is flat and the
A pail of water is rotated in a vertical circle of radius1m, what two external forcces act on the water in the pail
A "light-year" is the distance light (speed = 2.998 108 m/s) travels in one year. What is the speed of light in AU/h
To determine the location of his center of mass, a physics studentlies on a lightweight plank supported by two scales 2.5 mapart. find the distance from the student's head to his center of mass
An ultrasonic pulse is sent off a steel beam bounces off a the end and the pulse is detected 0.003 seconds later. What is the total distance the sound wave travels?
The elevator of a large building is designed to raise a net mass of 400 kg at a constant speed of 12 m/s using an electric motor. Find the minimum power rating of the motor
Water has a mass per mole of 18.0 g/mol, and each water molecule (H2O) has 10 electrons. What is the net charge of all these electrons
A person scuffing her feet on a wool rug on a dry day accumulates a net charge of -95?C. By how much does her mass increase
Two blocks are connected by a lightweight, flexible cord that passes over a frictionless pulley. If m1 is 3.7 kg and m2 is 9.0 kg, and block 2 is initially at rest 140 cm above the floor, how long does it take block 2 to reach the floor.
A window has a glass surface are of 1.6x10^3 cm^2 and a thickness of 3.0 mm. Find the rate of energy transfer by conduction through the window when the temperature of the inside surface of the glass is 70F and the outside temperature is 90F.
A steel ball is hung from a vertical ideal spring where it oscillates in simple harmonic motion with a period T. At time t = 0 s, the ball is at its maximum displacement, A, from its equilibrium position. In terms of the period, at what time will t..
A 3.9 kg stone is tied to a 5.8 m long string and swung around a circle at a constant angular velocity 1.7 1/s. Find the magnitude of the torque about the origin
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