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Q. Two lenses that are 35 cm apart are used to form an image. Lens 1 is converging and has a focal length 14 cm; lens 2 is diverging and has a focal length -7.0 cm. The object is placed 24 cm to the left of lens 1. (a)Use a ray diagram to find the approximate location of the image. (b) Is the image upright or inverted? (c) Is the image real or virtual? Explain. (d) Determine the distance from lens 1 to the final image for the system using the lens equation. (e) What is the magnification of this image?
Q. A drinking straw 20cm long and 3.0mm in diameter stands vertically in a cup of juice 8.0cm in diameter. A section of straw 6.5cm long extends above the juice. A child sucks on the straw, and the level of juice in the glass begins dropping at 0.23cm/s. by how much does the pressure in the child's mouth differ from atmospheric pressure?
A kid fires water horizontally from a squirt gun held 1.6 above the ground. It hits other kid 2.4 away squares in the back, at a point 0.85 above the ground. What was the initial speed of the water.
To get back to the shuttle, the astronaut unstraps a 10-kg tool kit and throws it away with a speed of 8 m/s. In the script, the astronaut, who has a mass of 80 kg without the toolkit, survives, but is this accurate.
What is the length of the greatest and thinnest string that can be located under a tension of 860 without breaking .
A 400 g lemming (does anyone remember that old computer game?) waddles horizontally off a small 4.90 m high cliff with a speed of 0.5 ms-1.How far from the base of the cliff will the lemming land? What will be the lemmings speed upon landing.
A horizontal uniform bar of mass 2.7 and length 3.1 is hung horizontally on two vertical strings. String 1 is attached to the end of bar, and string 2 is attached a distance 0.7 from other end. A monkey of mass 1.6 walks from one end of the bar to th..
How fast must the bat fly, v_b, to hear a beat frequency of 205 rm {Hz}.
The basic concepts in optics.
How much energy is necessary to bring the system back
A bucket is made from thin sheet metal. The bottom and top of the bucket have radii of 21.0 cm and 39.0 cm, respectively. The bucket is 30.0 cm high and filled with water. Where is the center of gravity.
As part of the safety investigation, two 1400 {rm kg} cars travelling at 23 {rm m/s} are crashed into different barriers. Find the average forces exerted on (a) car that hits a line of water barrels and takes 1.7 {rm s} to stop, and (b) car that hits..
A single-turn circular loop of radius 8.00 cm is to produce a field at its center that will just cancel the earth's field of magnitude 0.7G directed at 70 below the horizontal north direction. Find out the current in the loop.
Suppose one gallon of gasoline produces 1.1 x10^8 J of energy, and this energy is enough to operate a car for 18 miles. An aspirin tablet has a mass of 275 mg. If the aspirin could be converted completely into thermal energy, how many miles would ..
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