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(Potential Energy and Conservation of Energy)
What should be the spring onstant k of a spring designed to bring a 1200-kg ar to rest from a speed of 95 km/h so that the o upants undergo a maximum a eleration of 4.0 g?
A cylindrical copper rod and an iron rod with exactly the same dimensions are welded together end to end. What is the temperature at the midpoint where the rods are joined together
question a spacecraft descends vertically near the surface of planet x. an upward thrust of 25.0 kn from its engines
How long does it take an automobile traveling in the left lane of a highway at 55.0 km/h to overtake (become even with) another car
A 180g block hangs from a spring with spring constant 6.0 N/m. At the block is 31cm below the equilibrium point and moving upward with a speed of 98.0cm/s. What is the block's position at t = 9s.
A police car with a siren of frequency 8 kHz is moving with uniform velocity 36 km/hr towards a tall building which reflects the sound waves. The frequency of the siren heard by the car driver is
Each cycle, a certain heat engine expels 265 J of heat when you put in 355 J of heat. Find the efficiency of this engine. Find the amount of work you get out of the 355 J heat input.
Ten boxes, each 22.0 cm high and weighing235 N, initially are all side by side onthe floor. The boxes are lifted and placed in a vertical stack2.20 m high in a time interval of5.50 s. Compute the power necessary to stack the boxes.
The stiffness matrix for the system shown in Figure is given as,Determine the Choleski decomposition U and U-1.
Consider the capacitor network. Find the equivalent capacitance Cab for the entire capacitor network between points a and b. answer in units of μF.
a bullet is fired through a board 12.0 cm thick in such a way that the bullets line of motion is perpendicular to the
A playground merry-go-round of radiusR=2.00m has a moment of inertiaI=255kg·m2and is rotating at9.0rev/min about a frictionless vertical axle. What is the new angular speed of the merry-go-round
Atoms can be cooled using multiple laser beams. In such an experiment, the temperature of sodium atoms can be cooled to 0.1 mK. What is the rms speed of the atoms at this temperature
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