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Pretend our Galaxy is shaped like a compact disc, with a radius of R = 15 kpc. If there are about N = 100 other civilizations presently in our Galaxy, and assuming they are uniformly distributed, how far apart from each other are they on average
A bucket in an old well is hoisted upward by a rope which winds up on a cylinder having a radius of 0.050 m. How many rev/s must the cylinder turn
The magnitude of a single force action on a particle of a mass m is given by F = bx2 where b is a constant. The particle starts from rest. After it travels a distance L, estimate what is its kinetic energy and speed
A single slit forms a diffraction pattern, with the first minimum at an angle of 40.0° from central maximum, when monochromatic light of 520-nm wavelength is utilized. The same slit, illuminated by a new monochromatic light source, produces a diffrac..
The electric field at the surface of a charged, solid, coppersphere with radius 0.210 m is3380 N/C directed toward the center ofthe sphere. What is the potential at the center of the sphere, ifwe take the potential to be zero infinitely far from thes..
A proton in the upper atmosphere moves at 8.6×105m/s , perpendicular to Earth's magnetic field, Find the curvature radius of the proton's trajectory
The ground reaction force actin gon the long jumper is 4500N acting forward and upward at an angle of 78 degrees from horizontal. What is the vertical component of the ground reaction force
The masses of the earth and moon are 5.98 × 1024 and 7.35 × 1022 kg, respectively. find the magnitude of the charge placed on each body
An object of mass 0.77 kg is initially at rest. When a force acts on it for 2.9 ms it acquires a speed of 16.2 m/s. Find the magnitude of the average force acting on the ball
Standing at a crosswalk, you hear a frequency of 550 Hz from the siren of an approaching ambulance. Determine the ambulance's speed from these observations
A bat strikes a 0.145 kg baseball. Just before impact, the ball is traveling horizontally to the right at 50.0 m/s, What is the horizontal component of the impulse the bat imparts to the ball
A hydraulic lift is used to jack a 1120kg car 10 cm off the floor. The diameterof the output piston is 18 cm, and the input force is 250 N. Calculate the combined work input of all of the strokes
A .1 kg meterstick is supported at its .4m mark by a stringattached to the ceiling. A .7 kg mass hangs vertically from the.05m mark. A mass is attached somewhere on the meterstick to keepit in both horizontal and rotational and translational equil..
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