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A convex mirror is formed from a polished metal sphere of radius 60 centimeter. Find what type of image does an object located 20 centimeter in front of this mirror produce? Determine how far away from the mirror is it?
A string %uFB01xed %uFB01xed at both ends is 1 m long. It resonates in its second harmonic at a frequency of 55 Hz. What is the speed of transverse waves on the string
The mass of a certain planet is 6.93×1023 kg, and its radius is 1111 km. What is the acceleration due to gravity on the planet's surface
An object with a mass of 27 g displaces 306.6 ml of water when it is completely immersed. What is the buoyant force on the mass
What is the rms current in a series RC circuit if R = 6.0 kohm . C = 0.80 muF, and the rms applied voltage is 120 V at 60 Hz? What is the phase angle between voltage and the current? What is the power dissipated by the circuit? What are the voltmeter..
An airplane has a mass of 1.40 104 kg, and each wing has an area of 33.0 m2. Determine the pressure on the upper wing surface
A real ammerter has non-zero resistance, and so acts like aresistor in a circuit. One ammerter has resistance 0.5Ω. Whenit is placed across a battery (with emf ε and internalresistance r), the terminal voltage of the battery is 5.0V.
A proton takes 99.0 usto complete one orbit around a 14.5 m diameter cyclotron. What's the cyclotron's magnetic field
A pulley system lifts a 1345-N weight a distance of 0.975 m. Paul pulls the rope a distance of 3.90 m, exerting a force of 375 N. How efficient is the system? What is the mechanical advantage?
Two 1.50-V batteries-with their positive terminals in the same direction-are inserted in series into the barrel of a flashlight. What is the bulb's resistance
What should the charge (sign and magnitude) of a 1.44-g particle be for it to remain stationary when placed in a downward-directed electric field of magnitude 670N/C? What is the magnitude of an electric field in which the electric force on a proton ..
Sodium coolant with a specic activity of 0.05 Ci/cm3 passes through a long pipe 8 in. in diameter. estimate the thickness of a cylindrical concrete shield
How long does it take for ice to grow to a thickness of 4cm on apond on a windy night when the air temperature is -6 degreecelsius. Assume the surface ice is maintained at a temperature of -6degree celsius.
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