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Determine where must an object be placed if front of a mirror with focal distance +1 meter in order to produce an image with magnification +2?
A water skier is being pulled by a tow rope attached to a boat. As the driver pushes the throttle forward, the skier accelerates. find the work done by the net external force acting on the skier
How much work would it take to move a positive charge, 1uC, from the negative side of a parallel plate combination to the positive side when the voltage difference across the plates is 100V
A 0.50-kg mass is attached to a spring of spring constant 20 N/m along a horizontal, frictionless surface. What is the amplitude of vibration
Stephen is pushing his sister Joyce in a wheel barrow when it's stopped by a brick 7.83 cm high. What force must Stephen apply along the handles in order to just start the wheel over the brick
Assume that the interior of the earth can be treated as an incompressible fluid in equilibrium. {HINT: Let ? denote the density; take ? to be a constant; ? = M/V.}
A certain laser emits light in a narrow band of wavelengths centered at 632.7 nm and with a ''wavelength width'', What is the corresponding ''frequency width'' in hertz for the emission
A dentist's drill starts from rest. After 3.20 s of constant angular acceleration it turns at a rate of 2.3 104 rev/min. Find the drill's angular acceleration
The 1400-turn coil in a dc motor has an area per turn of 1.1 multiply.gif 10-2 m2. What is the current in the coil
Assume that when you ride on your 7.60-kilogram bicycle the weight of you and the bicycle is supported equally by the two tires. compute what is your weight
A parallel-plate vacuum capacitor has 6.36 J of energy stored in it. The separation betweenthe plates is 2.20 mm. If the separation is decreased to1.85 mm,
A battery having an emf of 9.80 V delivers 109 mA when connected to a 60.0 load. Determine the internal resistance of the battery
A 3-kg block is pulled along a FRICTIONLESS surface with a force of 42N. What is the force exerted on the 2-kg block by the 1-kg block
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