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An unknown mass is hung from a very light spring with a spring constant of 19 N/m. Neglect the mass of the spring. If the period of oscillation of the mass-spring system is 2.8 s, then evaluate what is the unknown mass?
A 451-? resistor and a 257-mH inductor are connected in series with an ac generator with an rms voltage of 20.0 V and a frequency of 60.0 Hz
a man lost in a maze makes three consecutive displacements so that at the end of his travel he is right back where he
a certain airplane can accelerate on the runway at a rate of 2.5 ms2 and must attain a speed of 30 ms in order to take
A pilot, whose mass is 85.0 kg, makes a loop-the-loopin a fast jet. Assume that the jet maintains a constant speed of105 m/s and that the radius of the loop-the-loop is 0.393 km
A frictionless gas-filled cylinder is fitted with a movable piston.The block resting on the top of the piston determines the constantpressure that the gas has. The height h is 0.120 mwhen the temperature is 273 K and increases as the temperature i..
A 16 cm long animal tendon was found to stretch 3.9 mm by a force of 13.9 N. The tendon was approximately round with an average diameter of 7.5 mm. Calculate the elastic modulus of this tendon.
Two cars collide at an intersection. Car , with a mass of 2000 , is going from west to east, while car , of mass 1300 , is going from north to south at 12.0. How fast was car going just before the collision
A moving particle encounters an external electric field that decreases its kinetic energy from 10270 eV to 7400 eVas the particle moves from position A to positionB. The electric potential at A is -52.0 V, and the electric potential at Bis +27.7 V..
a copper bar 2.5 m long has a circular cross section of radius 2 cm. one end is kept at 80 oc and the other end is kept
a baseball thrown from the outfield is released from shoulder height at an initial velocity of 29.4 ms at an initial
A spherical balloon is made from a material whose mass is 2.57 kg. The thickness of the material is negligible compared to the 1.22-m radius of the balloon. Find the absolute pressure of the helium gas
Compute the most probable distance that a nitrogen molecule will traverse in tissue after 0.5 s if the molecule experiences 1012 collisions/s; assume that the mean free path in air is 10-7 m.
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