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Q. A dentist uses a small mirror of radius 52 mm to locate a cavity in a patient's tooth. If the mirror is concave and is held 13 mm from the tooth, what is the magnification of the resulting image?
Q. A chair of weight 70 lies atop a horizontal floor; the floor is not frictionless. You push on the chair with a force of = 37.0 directed at an angle of 42 below the horizontal and the chair slides along the floor.
Volcanoes on the Earth eject rocks at speeds of up to 160 m/s. Consider a 1260 m high volcano that ejects rocks in all directions. What is the maximum height above sea level reached through rocks.
What is the direction of proton after the collision? What is the direction of carbon atom after the collision.
A loudspeaker of mass 25 is suspended a distance of = 1.60 below the ceiling by two cables that make equal angles with the ceiling. Each cable has the length of = 3.30.
An electric field of 300 V/m is confined to a circular area d = 11.1 cm in diameter and directed outward perpendicular to the plane of the figure. If the field is increasing at the rate of 22.0 V/m·s, what are direction and magnitude of the magnet..
Coherent light that contains two wavelengths, 660 nm and 470 nm, passes by two narrow slits with a separation of 0.280 mm and an interference pattern is observed on a screen which is a distance 4.40 m from the slits.
The sun falls on a concave mirror and forms an image 4.5 cm from the mirror. If an object 22 mm high is placed 12.7 cm from the mirror, where will its image be produced.
A 19 g bullet is shot into a 5270-g wooden block standing on a frictionless surface. The block, with the bullet in it, acquires a velocity of 2.4 m/s. compute the velocity of the bullet before striking block.
The coefficient of static friction between the 3000 lb car's tires and the road is 0.5. Determine the steepest grade the car can drive up at constant speed if car has (a) rear=wheel drive; (b) front-wheel drive; (c) four wheel drive.
What mass of stone is necessary if the temperature is not to drop below 18.5°C overnight. Sunlight shining in during the daytime is absorbed by the floor, interior walls, and objects in the room, raising their temperature to 37.5°C.
A photoflash unit makes a very bright light for a very short time. Discuss differences in the exposure of the film with and without a flash unit. Consider the f-stop and shutter speed in your deliberation.
A 150g ball and a 250g ball are connected by a 34cm long, massless, rigid rod. The balls rotate about their center of mass at 130 . what is the speed of ball of 150 g.
At one instant a bicyclist is 50 m due east of a park's flagpole, going due south with a speed of 9 m/s. Then, 24 s later, the cyclist is 45 m due north of the flagpole, going due east with a speed of 20 m/s. For the cyclist in this 24 s interval,..
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