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An 8-cm object is placed in front of a mirror which produces an inverted image that has a height of 16c m. When the object is moved 10 cm closer to the lens, the image is upright with a height of 16cm. What is the focal length of this lens?
An object has a kinetic energy of 317 J and the momentum of magnitude 24.0 kg · m/s.
The plane of a rectangular coil, 4.0cm by 8.0 cm, is perpendicular to the direction of a magnetic field, vector B . If the coil has 50 turns and a total resistance of 8.0 Ω, at what rate must the magnitude of vector B change to induce a current of..
A pulley system lifts a 500 lb bloch 2 feet with an effort of 50 lbs. If the 50 lbs moves 30 feet, what is the efficiency of the pully system
Two capacitors connected in parallel produce an equivalent capacitance of 40.0?F, What is the individual capacitance of each capacitor
an lady bug walks 20.0 cm in a direction of 30.00 north of east. she then turns and walks 30.0 cm north turns and walks
In order better to map the surface features of the Moon, a 379-kg imaging satellite is put into circular orbit around the Moon at an altitude of 1.21 × 10^2 km. Calculate the satellite\'s gravitational potential energy
An ocean liner sailing at 43.40 m/s is caught in a current flowing 11.20 m/s at 24.7 degrees east of south what is the direction (angle) of the overall speed of ocean liner.
a rotating wheel requires 7.00s to rotate 26.0revolutions. its angular velocity at the end of the 7.00-s interval
A generator uses a coil that has 210 turns and a 0.20-T magnetic field. The frequency of this generator is 60.0 Hz, and its emf has an rms value of 120 V. assume that each turn of the coil is a square (an approximation), conclude the length of wire f..
A rectangular block of ice 7.00 m on each side and 1.80 m thick floats in sea water. The density of the sea water is 1025 kg/m3. The density of ice is 917 kg/m3. How high does the top of the ice block float above the water level.
A fuel pump sends gasoline from a car's fuel tank to the engine at a rate of 0.0574 kg/s. The density of the gasoline is 735 kg/m3, and the radius of the fuel line is 0.00322 m. What is the speed at which the gasoline moves through the fuel line?
q1. the driver of an 1800 kg car travelling on a horizontal road at 100 kmh suddenly applies the brakes. because of a
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