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Q1. A jeweller working with a heated 44 g gold ring must lower the ring's temperature to make it safe to handle. If the ring is initially at 94 degrees Celsius, what mass of water at 25 degrees Celsius is necessary to lower the ring's temperature to 35 degrees Celsius?
Q2. A clerk moves the box of cans down an aisle by pulling on a rope attached to the box. The clerk pulls with a force of 153 N at an angle of 25.0° with the horizontal. The box has a mass of 35.0 kg, and the coefficient of kinetic friction between box and floor is 0.450. Find an acceleration of the box.
What magnetic field strength produced by Helmholtz coils
What is the magnitude of the magnetic field. Evaluate this to the tension as the boat is raised and held at rest so the angle becomes 25 degrees.
An object is 17 mm in front of a converging lens, and the image is 3 mm behind the lens. What is the focal length of the lens? Reply In mm
A conveyor belt at a quarry lifts 2,000 kg of sand per minute up a vertical distance of 12 meters. The sand is at first at rest, then moves at a speed of 0.20 m/s along conveyor belt. What is the instantaneous power generated by this machine .
What distance does baseball move before its release
Two identical carts travel at 1m/s in opposite directions on a common horizontal surface. They collide head-on and are reported to rebound, each with the speed of 2m/s.
How much energy is necessary to bring the system back
A 180g block hangs from a spring with spring constant 6.0 N/m. At the block is 31cm below the equilibrium point and moving upward with a speed of 98.0cm/s. What is the block's position at t = 9s.
What is the terminal speed at which the bar falls? Imagine the bar remains horizontal and in contact with the rods at all times.
An 825-N sled is pulled a distance of 161 m. The task requires 1.50 ^ 10^4 J of work and is done by pulling on a rope with a force of 137 N. At what angle is the rope held.
A block with mass m = 19.0 kg slides down an inclined plane of slope angle 17.8 ° with a constant velocity. It is afterwards projected up the same plane with an initial speed 1.35 m/s. How far up the incline would the block move before coming to rest..
How much time elapses between first splash and second splash
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