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The focal length of diverging lens is negative. if f=-20cm for a particular diverging lens, where well the image be formed of an object locate 50cm to the left of the lens on the optical axis? What is the magnification of the image?
A long, current-carrying solenoid with an air core has 1740 turns per meter of length and a radius of 0.0210 m. What is the mutual inductance of this system
26 g of copper pellets are removed from a 300 degree Celsius oven and straight away dropped into 116 mL of water at 25 degree Celsius in an insulated cup. What will the new water temperature be.
There is an electric field of 113N/C directed along the + x axis. If the string makes an angle 26 degrees with the y axis when the sphere is in stability, what is the charge on the sphere.
The isotope, tritium, has a half-life of 12.3 years. Assume we have 12 kg of the substance. How much tritium will be left after 26years? State your answer in kg ( two decimal places)
You find a pirate map which describes the path to a buried treasure. Starting from an old oak tree in a field, How far away from the base of the oak tree and in what direction is the treasure buried
An LC circuit has zero resistance, no battery, a capacitor C=70microFarads, and an inductor L=0.6H connected in a simple loop. What is the maximum magnetic field inside the inductor
A racetrack has the shape of an inverted cone, as the drawing shows. On this surface the cars race in circles that are parallel to the ground, and the surface is at an angle = 40°. For a speed of 35 m/s, at what value of the distance d should a drive..
A spelunker (cave explorer) drops a stone from rest into a hole. The speed of sound is 343 m/s in air, How deep is the hole
Nobel laureate Richard Feynman (1918-1988) once said that if two persons stood at arm's length from each other and each person had 1% more electrons than protons, the force of repulsion between them would be enough to lift a "weight" equal to that..
A proton (+1.6 · 10 -19 C) moves 10 cm on a path in the direction of a uniform electric field of strength 3.0 N/C. How much work is done on the proton by the electrical field
A refrigerator has a coefficient of performance equal to 6.00. The refrigerator takes in 150 J of energy from a cold reservoir in each cycle, Find the work required in each cycle
A heat engine does 798.57 J of work per cycle while exhausting 163.83 J of waste heat. What is the engine's thermal efficiency in percent
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