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A ball thrown downwards from a height h, mass m, initial velocity Vi, and final velocity Vf. If it is momentarily at rest, what kind of energy does the system have? (Assume some mechanical energy is lost)
A seagull flies with a velocity of 12.5 m/s straight into the wind. (ie.. this the velocity of the gull relative to the wind), Calculate the speed of the wind
A parallel-plate capacitor has circular plates with radius 45 centimeter and spacing 1.0 millimeter. Obtain the magnetic field between the plates on the symmetry axis
a slingshot consists of a light leather cup containing a stone. the cup is pulled back against two parallel rubber
Catching a wave, a 77-kg surfer starts with a speed of 1.1m/s , drops through a height of 1.60m , and ends with a speed of 8.4m/s. How much non conservative work was done on the surfer
two force vectors act on an object i 60.0 newton at 45.0deg north of east and ii 25.0 newton at 30.0deg south of east.
A proton is released from rest at the positive plate of a parallel-plate capacitor. What will be the final speed of an electron released from rest at the negative plate
A machine that makes transformers can only wind the coils with a single specific number density. what is length of the output coil
A +60 µC charge is placed 56 cm from an identical +60 µC charge. How much work would be required to move a +0.57 µC test charge from a point midway among them to a point 11.0 cm closer to either of the charges?
The area of a typical eardrum is about 5.0 × 10?5 m2. (a) Calculate the sound power (the energy per second) incident on an eardrum at the threshold of hearing. W (b) Calculate the sound power incident on an eardrum at the threshold of pain. W
A typical light bulb in your house is rated 117.6 W, which means that the lightbulb dissipates 117.6 W when connected to a DC voltage of 110V. what is the dissipated power
A 16 g bullet strikes and becomes embedded in a 1.10 kg block of wood placed on a horizontal surface just in front of the gun. what was the muzzle speed of the bullet
A copper rod is fastened securely at both ends to immovable supports. What is the magnitude |?T| of the change in temperature of the rod when it ruptures
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