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A 5-kg rock that has been dropped from a high cliff experiences a force of air resistance of 25 N. What is the magnitude?
Sam's job at the amusement park is to slow down and bring to a stop the boats in the log ride if a boat and its riders have a mass of 1200 kg
Assuming a heating value for coal of 13.0 × 103 Btu/lbm and that the engine was reversible, determine the thermal efficiency of this engine.
A transformer is an electrical device that can change the voltage from one value to another, based on the principle of Faraday's Law of Induction. Consider a transformer with Np turns of wire in the primary (input) circuit and Ns turns in the seco..
A satellite of mass 50.0kg is orbiting the earth at aheight of 1000km (as measured above the surface of the earth). The mass of the earth is 5.98x1024kg and the earth's radiusis 6.38x106m.
The intensity of an earthquake wave passing through the Earth is measured to be 1.5×106J/m^2\cdot s at a distance of 55km from the source. What was its intensity when it passed a point only 1.0km from the source?
In this problem, you will apply kinematic equations to a jumping flea. Take the magnitude of free-fall acceleration to be 9.80m/s^2. What is its initial velocity as it leaves the ground
An aluminum rod is 16.0 cm longat 20°C and has a mass of 350 g. If 13000 J of energy is added to the rod by heat, what is the change in length of the rod
In a Compton scattering experiment, an x-ray photon scatters through an angle of 18.0° from a free electron that is initially at rest. Calculate the angle through which the electron scatters
A positively charged balloon is brought close to a neutral bit of paper, which it attracts. Draw a diagram showing the charge separation in the paper and explain why the attraction occurs.
An ultralight plane and pilot have a total mass of 194 kg. While executing a banked curve of radius 23 m at a speed of 12 m/s, what is the net force acting on the plane and pilot
A clock is located in a satellite that orbits the earth with a period of 82 minute at the radius 6.24942 x 106 meter. Find by what time interval will this clock differ from an identical clock on the earth after 2 year
An experiment was performed where a quartz-iodine lamp was used to measure the photocurrent in microamperes in intervals of 10 nm from 400 nm to 900 nm for the voltage settings of 60, 80, 100, and 120V.
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