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A luminous disk of diameter 2 cm is places 0.8m to the left of a flat screen. A converging lens is places among the disk and the screen at a location 20cm from the disk and a real image is formed on the screen.
1. Discover the focal length of the lens.
2. Discover the size of the image.
a 1500-kg automobile is pulled behind a tow truck. the power exerted by the tow truck on the car is a constant 50 kw.
A man is standing on a platform that is connected to a pulley arrangement, as the drawing shows. What pulling force should the man apply to create an upward acceleration of 1.20 m/s2
A star is moving away from Earth at a speed of 2.4 X 10^8 m/s. find the wavelength as measure by an Earth observer
Your car tire is rotating at 3.9 rev/s when suddenly you press down hard on the accelerator. What is the tires angular acceleration
a parallel-plate capacitor has an area of 5.40 cm2 and the plates are separated by 1.20 mm. the capacitor stores a
light of wavelength 659.9 nm is emitted by a star. the wavelength of this light as measured on earth is 660.9 nm. how
A 2.5kg cannonball is fired from the top of a cliff. The cannonball leaves the cannon at a height of h=75 m above the ground below. what is the speed of the cannonball just before it hits the ground
An object is launched upward with initial velocity 10.0m/s. What maximum height can it reach
What is the final temperature of the heating element
In a parallel circuit I=10.0A. There are 4 resistors. R1=13ohms R2=7ohms R3=15ohms R4=21ohms. What is the voltage drop across each resistance
A pipe open at one end has a fundamental frequency of 256 Hz. A second pipe,identical to first pipe, is shortened by cutting off a portion of the open end. When both pipes vibrate at their fundamental frequencies, a beat frequency of 12 Hz is heard..
Two small charged balls have a repulsive force of 0.18N when they are separated by a distance of 0.85m. How far apart are they now
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