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A block of mass 8.4 kg is pulled along a horizontal frictionless floor by a cord that exerts a force of 53.0 N at an angle 29.2° above the horizontal. What is the magnitude of the acceleration of the block? What is the magnitude of the normal force exerted on the mass by the floor?
An electron of mass, m, collides with an atom of mass M. The atom is initially at rest, What is the minimum speed of the electron in order to excite the atom
A uniform magnetic field B is perpendicular to the plane of rotation. What is the potential difference between the ends of the bar
Estimate, from these data, the effective distance between the atoms.
A battery with an emf of 12.00 V has an internal resistance r. When connected to a resistor R, the terminal voltage is 11.70 V, What is the energy dissipated in the battery's internal resistance in 4.20 minutes
A ball is thrown directly downward with an initial speed of 8.50 m/s, from the height of 29.5 m. After what time interval does it strike the ground.
A 47 kg person, standing 0.980 m from the axis, begins to run on the disk in a circular path and has a tangential speed of 3.10 m/s relative to the ground. Find resulting angular speed (in rad/s) of the disk.
Assume the acrylic D-shaped lens, What is the critcal angle of the d-shaped lens while it is in water
A ball is thrown upward from the top of a building at an angle of 30.0° to the horizontal and with an initial speed of21.0m/s. Find the horizontal range of the ball
A single conservative force acts on a 5.30-kg particle within a system due to its interaction with the rest of the system, calculate the work done by this force on the particle
On a hot day, the temperature of a road surface may rise to over 50 degrees C. calculate the net radiation flux from the road to the air
A point mass of m1 = 2.3 kg is placed at the origin. Masses m2 = 5.4 kg and m3 = 7.6 kg are placed at 3.5 m and -5.8 m on the x-axis, respectively. Find out the location on the x-axis of the center of mass.
Three point charges, -6.05 10-9 C, -9.40 10-9 C, and +7.25 10-9 C, are fixed at different positions on a circle. What is the radius of the circle
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