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A block of ice with a mass of 3000kg is being pulled along a horizontal surface by a force F=300N at 30 degrees. Calculate the work done by this force in moving the ice 50.0m. Also calculate the work done by a friction force f=120N while the ice is being moved.
Speedboat A negotiates a curve whose radius is 150 m. Speedboat B negotiates a curve whose radius is 190 m. Each boat experiences the same centripetal acceleration. What is the ratio vA/vB of the speeds of boats.
A charge of -5.5 micro Coulombs is placed at the origin of a coordinate system. Another charge of -5.5 micro Coulombs is placed at x = +0.22 m, y = +0.15 m.
Helium-Neon laser: "Lambda"= 632.8nm. We can observe the first order maximum at "theta"= 25 degrees. What is the second order maximum angle
The mass of a certain planet is 6.93×1023 kg, and its radius is 1111 km. What is the acceleration due to gravity on the planet's surface
The helicopter in the drawing is moving horizontally to the right at a constant velocity. The weight of the helicopter is W=47800 N. What is the magnitude of the lift force
An infinite line of positive charge lies along the y axis, with charge density ? = 2.80 ?C/m. Find the magnitude of the net force exerted on the dipole
a 50-N crate is pulled up a 5-m inclined plane by a worker at a constant velocity. what is the force applied by the worker
A student holds a tuning fork oscillating at 260 Hz. He walks towards a wall at a constant speed of 1.16 m/s. How fast must he walk away from the wall to observe a beat frequency of 4.50 Hz
X rays with a wavelength of 0.14 nm undergo first-order diffraction from a crystal at a 70^\circ angle of incidence. What is the angle of second-order diffraction
If a person hike 5 km north, 4 km to the east, 3 km to the north, 2km to the west, and 4 km to the south. What is the the distance the hiker traveled
A circular loop of wire having a radius of 6.0 cm carries a current of 0.14 A. A unit vector parallel to the dipole moment of the loop is given by 0.40i -0.92j, Find the magnetic potential energy of the loop
If astronauts could travel at v = 0.950c, we on Earth would say it takes (4.20 / 0.950) = 4.42 years to reach Alpha Centauri, 4.20 light-years away. How much time passes on the astronauts' clocks
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