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A converging lens (f = 13.0 cm) is held 7.10 cm in front of a newspaper, the print size of which has a height of 1.80 mm. Find the image distance (in cm) and the height (in mm) of the magnified
A refracting telescope has an angular magnification of -92.00. The length of the barrel is 1.100 m. What are the focal lengths of a) the objective and b) the eyepiece?
When the object is moved to 48.0 cm from the lens, the image moves 16.0 cm farther from the lens. Find the focal length of this lens?
An airplane is flying at an elevation of 5150 ft,directly above a straight highway. Two motorists are driving cars onthe highway on opposite sides of the plane, & the angle of depression to one
A ferry boat transports tourists among three islands. It sails from the first island to the second island, 4.76 km away, in a direction 37.0° north of east. Calculate the distance between The
The airspeed of the plane is 240 km/h and there is a steady wind of 50 km/h blowing northwest to southeast. Determine the proper heading for the plane and the time of flight.
Carpet is to be laid in a room that is in the form of acircular sector with a central angle of 105o. If thelength (radius) of the room is 80 feet, what is the area of the carpet to be laid?
A rotating sprinkler is placed in the vertex of apie-shaped plot of ground. If the sprinkler shoots the water out 46feet and the length of arc of the watered area is 66 feet, to thenearest square fo
In an experiment to determine the speed of sound in air a student bangs two blocks of wood together when standing 125 meters away from a high wall the student hears the echo from the wall within 1 s
On seeing the meter stick released, you grab it with these two fingers. Derive a relationship for your reaction time in terms of this measured distance, d.
With winter coming on, this rate of hair growth is steadily increasing, by 0.132 mm/day every week. By how much will the dog's hair grow during 5 weeks?
The owner estimates that there will be 20 more racers per week for every $1.00 reduction in the price per ticket. How can the go-cart owner maximize weekly revenue?
Usha and Ritu are two sisters. Usha wants to explain some technologies to Ritu. Name some technologies and related principles.
What do you think did Einstein mean when he said: ''The most incomprehensible thing about the world is that it is comprehensible''?
If you look at yourself in shiny Christmas tree ball with a diameter of 9.0 cm when you face is 30.0cm away from it, where is your image? Is it real or virtual? Is it upright or inverted?
A long solenoid (diameter of 6.59 cm) is wound with 1417 turns per meter of thin wire through which a current of 0.289 A is maintained. A wire carrying a current of 28.7 A is inserted along the axis
A radio station with a power of 20 kW sends out an omnidirectional wave at 1.25 MHz. What is the wavelength of the electromagnetic wave?
In the other two corners are placed charges of +3.0 uC and -3.0 uC. what is the magnitude of the electric field at the square's center?
A proton has a speed of 3.0 x 106 m/s in a direction perpendicular to a uniform magnetic field, and the proton moves in a circle of radius 0.20 m. What is the magnitude of the magnetic field?
The frequency of a steam train whistle as it approaches you is 538Hz. After it passes you, its frequency is 486Hz. How fast was the train moving? (please show work for credit)
A horizontal power line of length 40 m carries a current of 2.7 kA as shown in the figure below. Earth's magnetic field at this location has a magnitude equal to 5.0 x 10-5 T and makes an angle of 6
A simple pendulum is swinging back and forth through a small angle, its motion repeating every 1.33 s. How much longer should the pendulum be made in order to increase its period by 0.29 s?
Child is playing by jumping on a bathroom scale. The mass of the child is 31 kg and when he stands on a bathroom scale, the spring inside the scale compresses 0.46 mm. (a) What is the spring constan
Location A is 2.80 m to the right of a point charge q. Location B lies on the same line and is 4.00 m to the right of the charge. The potential difference between the two locations is VB - VA = 45.0
A Styrofoam box has a surface area of 0.81 m2 and a wall thickness of 2.0 cm. The temperature of the inner surface is 5.0°C, and the outside temperature is 25°C. If it takes 7.3 h for 5.0 kg