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An object 3 cm high is placed 6 cm from a Perspex plano-concave lens that has a radius of curvature of 6 cm. Take the refractive index of Perspex to be 1.5. Decide the focal length of the lens and draw a ray diagram showing the relative positions of the object, image and lens. State the nature of the image formed.
A particular engine has a power output of 6.00 kW and an efficiency of 28.0%. Assume the engine expels 7000 J of energy in each cycle. Find the time required to complete each cycle
A steel beam that is 7.00m long weighs 330N. It rests on two supports, 3.00m apart, with equal amounts of beam extending from each end. Suki, who weighs 505 N, stands on the beam in the center and then walks toward one end. How close to the end can s..
an car mass 1000kg is traveling east 30m/s . it is hitby another car 2000kg whick was traveling northwest at20m/s.the two cars stick together. what is the velocity of the cars after they stick together
Two narrow slits 41 µm apart are illuminated with light of a wavelength 604 nm. What is the angle of the m=3 bright fringe in degrees.
Mary needs to row her boat across a 120{\rm m} -wide river that is flowing to the east at a speed of 1.5{\rm m/s}. how far downstream will she land
Water is flowing in a horizontal pipe of variable cross section. Where the cross-sectional area is 1.10×10-2 m2, the pressure is 5.60×105 Pa and the velocity 0.80 m/s. In a constricted region where the area is 5.00×10-4 m2
Light of vacuum wavelength 632.800 nm, emitted with a stabilized He-Ne laser, is reflected at normal incidence by the oil. How many wavelengths are contained in the light wave passing back and forth during the oil?
how long does it take the sun to melt a block of ice at 0 with a flat horizontal area 1.0 and thickness 2.0 ? assume
One end of a cord is fixed and a small 0.530-kg object is attached to the other end, where it swings in a section of a vertical circle of radius 3.00 m, as shown in the figure below. When ? = 16.0°, the speed of the object is 8.20 m/s.
In 1976, Kitty Hambleton of the United States drove a rocket-enginecar to a maximum speed of 965 km/h. Suppose Kitty started at restand underwent a constant acceleration with a magnitude of 4.0 m/s2.
The solar wind is a thin, hot gas given off by the sun. Charged particles in this gas enter the magnetic field of the earth and can experience a magnetic force, calculate the radius of the circular path on which the particle would move if it were a..
Two blocks are connected by a light but sturdy string wrapped around a mass-less pulley. What is the magnitude N of the normal force on the block of mass m
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