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A ball is thrown upward. At a height of 10 meters above the ground, the ball has a potential energy of 50 joules (with the potential energy equal to zero at ground level) and is moving upward with a kinetic energy of 50 joules. Air friction is negligible. The maximum height reached by the ball is most nearly
A car moving with an initial speed v collides with a second stationary car that is one-third as massive. Find the final speed of the second car
If the microstrip patches described above are arrayed as a 100 × 100 array of patches, calculate the gain of the array and the maximum power density at a distance of 10 km
A mad physicist assembled an EM wave generator. He claims that the generator is able to produce radio waves that have a frequency of 10 kHz
A garden hose of inner radius 0.6 centimeter carries water at 1.2 meter per second. Find how fast does the water move through the nozzle
A rod supports a 2.35 kg lamp. a) What is the tension in the rod? b) Estimate the components of the force that the bracket exerts on the rod.
what will a spring scale read for the weight of a 58 kg woman in an elevator that moves as follows?a upward with
In 2009, Formula 1 race cars were allowed to use a regenerative braking system that allowed them to store energy from braking and reuse it. What was the angular acceleration of the flywheel
The lift-tong mechanism shown consists of twin four-bar linkages and is used to lift a 40-kg machine component. Knowing that LAB = 36 mm, determine the smallest allowable value of the coefficient of static friction between the component and the gr..
q1. collapsible plastic bags are used in hospitals for infusions. we want to use such a bag to infuse an electrolyte
A hydrogen atom in a state having a binding energy (this is the energy required to remove an electron) of 0.85 eV makes a transition to a state with an excitation energy (this is the difference in energy between the state and the ground state) of ..
Explain how much waork has been done against gravity when the crate is raised a vertical distance of 2.19 m? The coefficient of friction is 0.316.
The lowest point in Death Valley is 85 m below sea level. What is the change in potential energy of an energetic 91.2kg hiker who makes it from the floor of Death Valley to the top of Mt. Whitney
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