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A mass of 6 kg lies on a horizontal, frictionless floor. A force of 85 Newtons pushes to the left (negative x direction) with a force of 85 Newtons. Another force of unknown magnitude pushes the mass in a direction of 27.8 degrees above the positive x axis. The mass is originally at rest before these forces are applied and 2.3 seconds after the forces have been applied, the mass has moved to the left a distance of 13.4 meters. What is the magnitude of the unknown force in Newtons?
in a single-slit diffraction experiment, a beam of monochromatic light of wavelength 630 nm is incident on a slit of width 0.4 mm. what is the width of the central bright fringe
An archer pulls her bow string back 0.40m by exerting a force that increases uniformly from zero to 25 N. How much work does the archer do in pulling back the bow.
A 75 g piece of ice at an initially unknown temperature is placed into a glass of 350 g of water sitting at room temperature, What is the specific heat capacity of the unknown metal
Ships A and B leave port together. For the next two hours, ship A travels at 40.0mph in a direction 55.0, What is the distance between the two ships two hours after they depart
The wavelength of the laser beam used in a compact disc player is 510 nm. Estimate the spacing between the slits of the grating
The coefficient of kinetic friction between dresser and the floor is and is the acceleration because of gravity. The floor exerts upward normal forces with magnitudes and where the dresser's legs rest on the floor. Note that this is a 2-dimensiona..
A 75?kg jogger runs with a speed of 4.2m/s, What is the jogger's de Broglie wavelength
A Carnot engine operating between energy reservoirs at temperatures 300K and 490Kproduces a power output of 800W. What is the rate of heat input
A very long wire is held under tension by suspending weights from an end that passes over a pulley. What is the speed of the traveling speed
A conical pendulum is formed by attaching a 41.0 g mass to a 1.3 m string. The mass swings around a horizontal circle of radius 32.0 cm. What is the tension in the string
The length of a string is 456 cm. It is held ?xed at each end. The string vibrates in three sections; i.e., the string has three antinodes and string vibrates at 180 Hz.
The block is spun at 50 , then the temperature of the rod is slowly increased. When the wax melts, the block slides out to the end of the rod. Illustrate what is the final angular velocity?
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