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A movie projector is equipped with a 0.6-meter focal length lens that is positioned 0.605 meters from the film.
a) How far from the lens must the screen be if the image on it is to be in focus?
b) How many times larger is the image than the object?
c) Is the image produced a real or a virtual image?
What frequency is heard by an observer who hears the 450-Hz siren on a police car traveling at 35 m/s away from her
A 60 kg crate is lowered using arope over a fixed support. The rope exerts a constant upward forceof 500 N.? How fast is the crate traveling when it hits the floor
The Hall effect can be used to determine the density of mobile electrons in a conductor. Find the density of mobile electrons in the material
A long solenoid has a diameter of 12.0 cm. When a current i exists in its windings, Calculate the magnitude of the induced electric field at the following distances from the axis of the solenoid
The skier's mass is 59.0 kg, and the coefficient of kinetic friction between the skis and the snow is 0.100. Find out the magnitude of the force that the tow bar exerts on the skier.
A gymnast with mass m1 = 47 kg is on a balance beam that sits on (but is not attached to) two supports. The beam has a mass m2 = 118 kg and length L = 5 m. Each support is 1/3 of the way from each end. Initially the gymnast stands at the left end ..
A scuba tank has a volume of cm2. For every deep dives, the tank is filled with (by volume) pure oxygen and 50% pure helium. What is the ratio of the rms speeds of the two types of molecules
You have a wire with a current that points upwards. If you put a compass east of that wire, how would the magnitude and direction of the total magnetic field change
Two negative and two positive point charges (magnitude = 3.64mC) are positioned on opposite corners of a square (each side = 0.155 m).Determine the magnitude of the force on each charge.
A current of 74.8 mA exists in a metal wire, In what direction do the electrons travel with respect to the current
While crossing campus you get your directions mixed up. You start traveling 278 m East; you then travel 101 m traveling 37 North of East, What is your final distance from where you started
A star is about 6.00 light years from Earth. How long would the trip take according to an Earth based observer
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