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An automoble of mass 3000kg is driven into a brick wall in a safetytest. The bumper behaves like a hooke's-law spring. It has aneffective spring constant of 5x106N/m, and is observed to compress a distance of 5.29 cm as the car is brought to a rest. What was the initial speed of the automobile? Answer in units ofm/s.
A series RCL circuit includes a resistance of 520 ohms, an inductance of 166 mH, and a capacitance of 500 nF. There is an alternating current of 660 Hz. What is the phase angle of the circuit
A piece of sandston with a bulk volume of 1.3 cc is contained ina 5-cc cell filled with helium at 760 mm Hg. Temperature is maintained constant and the cell is opened to another evacuated cell the same volume. The final pressure in the two vessels..
The wave function for a harmonic wave on a string is y(x,t) =(1.00mm)sin(62.8m-1x + 314 s-1t). Find the wavelength, frequency, and period of this wave
A passenger car traveling down a rough road bounces up and down at 1.3 Hz with a maximum vertical acceleration of 0.20 m/s^2, What is the maximum speed of the oscillation
When two resistors are connected in a parallel configuration the voltages across each are the same, What are the currents through these resistors
A child exerts a tangential 47.6 {N} force on the rim of a disk-shaped merry-go-round with a radius of 2.10 {m}. If merry-go-round starts at rest and acquires the angular speed of 0.080 {rev/s} in 3 {s}, what is its mass.
A plane accelerates from rest at a constant rate of 5.00 along a runway that is 1800 long. What percentage of the takeoff velocity did the plane gain when it reached the midpoint of the runway
A high-voltage transmission line with a resistance of 0.255 ?/km carries a current of 1.40 kA. The line is at a potential of 600 kV at the power station and carries the current to a city located 157 km from the power station. What is the power los..
a crate is pulled by a hoist a distance of 3.4m across the flat truck bed in 8 seconds. determine the work done in
At a certain instant a ball passes location m. In the next 4 seconds, the ball's average velocity is m/s. At the end of this 4 second time interval, what is the height y of the ball?
a spherical capacitor is formed from two concentric spherical conducting shells separated by vacuum. the inner sphere
Point charges q1=? 4.10nC and q2=+ 4.10nC are separated by distance 3.20mm , forming an electric dipole, What is the direction of the dipole moment
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