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A balsa wood block of mass 55 gram floats on a lake, bobbing up and down at a frequency of 2.9 Hz.
Part A Find what is the value of the effective spring constant of the water? Express your answer to two significant figures and include the appropriate units.
Part B A partially filled water bottle of mass 0.29 kilogram and almost the same size and shape of the balsa block is tossed into the water. Find at what frequency would you expect the bottle to bob up and down?
The two stars in a certain binary star system move in circular orbits. The first star, Alpha, has an orbital speed of 36.0 Km/s. The second star, Beta, has an orbital speed of 12.0Km/s. What is the mass of the star Alpha
A 38.8-cm diameter disk rotates with a constant angular acceleration of 2.60 rad/s2. It starts from rest at t = 0, and the line drawn from the center of the disk to the point P on the rim of the disk makes an angle of 57.3° with the positive x-axis a..
A block, m1,is resting on a frictionless horizontal surface. This blockis connected to a block, m2, by a string over africtionless pulley that has a mass of 5.0 kg and a radius of 12cm. What are the tensions on opposite sides of the pulley
A proton and an alpha particle (q = +2e, m = 4 u) are fired directly toward each other from far away, each with an initial speed of 0.012c. What is their distance of closest approach
two concentric thin-walled metallic spheres in vacuum have radii of a and b meters where b gt a. assume the voltage of
A 10cm long animal tendon was found to stretch3.8mm by a force of13.0N. Calculate the elastic modulus of this tendon
Three point charges, -4.9 x 10-9 C, -9.7 x 10-9 C, and +7.1 x 10-9 C, are fixed at different positions on a circle. What is the radius of the circle
A vibrating string resonates at a frequency of 280 Hertz. The next highest resonant frequency is 350 Hz. Determine what is the fundamental frequency
A loudspeaker of mass 18.00 kg is suspended a distance of h= 1.60.below the ceiling by two cables that make equal angles with the ceiling. Each cable has a length of t= 3.90 m. What is the tension in each of the cables? Use 9.80 for the magnitude ..
Two newly discovered planets follow circular orbits around a star in a distant part of the galaxy. What is the orbital period of the faster planet
A particle of rest mass 1.10 MeV/c2 and kinetic energy 2.10 MeV collides with a stationary particle of rest mass 2.80 MeV/c2. Find the speed of the first particle before the collision
An air molecule is moving at a speed of 450 m/s. How many meters would the molecule move during 7.00 ms (milliseconds) if it didn't collide with any other molecules.
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