07/20/16

PLEASE ANSWER ALL THREE WUESTIONS COMPLETELT ASAP
1.) a flagpole casts a 24 foot long shadown when the sun is at an angle of elevation of 65 degrees. how tall is the pole?2.)a painter needs to reach high up the side of a house to finish a painting... more
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05/04/15

How much energy in kilocalories(kcal) would combustion of 0.420 ounces of methane release?
The combustion of 45.0g of methane (natural gas) releases 2498 kJ of heat energy. How much energy in kilocalories(kcal) would combustion of 0.420 ounces of methane release?
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04/18/15

a piece of cloth cost Rs 35 if the length of the piece would have been 4 meter
a piece of cloth cost Rs 35 if the length of the piece would have been 4 meter longer and each meter costs rs 1 less the cost would have remained unchanged how long is the price    can anybody... more
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02/18/15

Find the critical angle and the angle of emergence
A ray of light in water of Refractive index nw=1.33 is indecent on water-air interface.  a) Find the critical angle of reflection b) Find the angle of emergence at 40 degree angle of incidence in... more
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02/11/15

focal length in single lens, length of camera
A telephoto lens consists of a combination of a converging lens and a diverging lens placed at a certain distance from each other. This enables us to produce a large image of a distant object with... more
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02/11/15

position of image of flaw
A clear plastic ball with a diameter of 8 cm has a flaw, which is actually 2 cm under the surface. The index of refraction of plastic is 1.4. Find the position of the image of the flaw when it is... more
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02/11/15

angle of minimum deviation
A hollow prism is made of plane parallel plates of glass. The angle between the faces is 56°. What is the angle of minimum deviation when the prism is filled with carbon disulphide and sodium D... more
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01/26/15

time x(hs) 0 12 3. distance y (mi) 0 60 120 180. A train travel at a constant speed. The distance y in miles that the train has after x is shown in the table
The relationship between the distance traveled by the train and the time in hours can be represented by an equation with two variables 
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01/26/15

velocity of sound
Two closed organ pipes of length 0.5 m and 0.525 m are sounded together and produce 6 beats per second. What is the velocity of sound in the medium with which the organ pipes are filled?
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01/26/15

fundamental frequency of string
A stretched string made of steel is vibrating at its fundamental frequency of 1500 Hz. What is the fundamental frequency of the second string made from the same steel, but which has a diameter... more
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01/21/15

sinusoidal wave on a string
A sinusoidal wave on a string is described by the equation: y = (0.15m) sin(10 pi t – 3 pi x + π/4), where x is in meters and t in seconds. If the mass per unit length of this string is 12.0 g/m,... more
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01/19/15

sound wave from an underwater explosion & angle of refraction in air
The speed of sound in water is 1500 m/s. A sound wave from an underwater explosion approaches the surface at an angle of incidence of 60°. What is the angle of refraction in air? (speed of sound in... more
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01/19/15

find the wavelength in water, steel, and brass
When a sound wave is transferred from one medium to another, its frequency does not change. If the wavelength of a disturbance is 17cm in air, find its wavelength in water, steel, and brass if the... more
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01/15/15

what is the angle of refraction in air?
The speed of sound in water is 1500 m/s. A sound wave from an underwater explosion approaches the surface at an angle of incidence of 60°. What is the angle of refraction in air? (speed of sound in... more
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09/03/14

please answer these in scientific notation
6 ? 10−8 m2 − 5 ? 10−8 m2   3.9 ? 10−12 m2 − 1.2 ? 10−11 m2   5.2 ? 10−9 m2 − 3.0 ? 10−9 m2   2.55 ? 10−18 m2 − 1.8 ? 10−18 m2
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08/14/14

Interference and Diffraction Example
I was hoping for an example with diagram for interference and diffraction problem with it focusing on physical locations.   An example that includes 2 slits or more and then possibly an example... more
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08/14/14

Thin Lens Equation
I was hoping someone could give me an example with answer and reasoning using the Thin Lens Equation.   The one we used in our lab was 1/f = 1/s + 1/s'.   I was hoping all terms could be... more
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04/30/14

In searching the bottom of a pool at night, a watchman shines a narrow beam of light from his flashlight, h = 1.1 m above the water level, onto the surface of t
this is a physics question I would really appreciate it if someone could help me do it!  thank you!   In searching the bottom of a pool at night, a watchman shines a narrow beam of light from... more
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11/07/12

I have a physics question
A soccer ball is kicked vertically from the ground level with a speed of 20m/s. At what height is the gravitational potential energy of the ball maximum?
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