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A horn on a boat sounds a warning and the sound penetrates the water. Explain how does the frequency of the sound in the air compare to its frequency in the water? Explain how does the wavelength in
Determine the change in molar Gibbs free energy when the pressure is increased by 1bar. The molar volume of liquid water is 18 cm^3/mol at 1 bar and 298 K.
Write down an equation that shows the pH dependence on the chromate,CrO42 /dichromate,Cr2O72-, equilibrium system.
The frequency of a light wave is similar if the light travels in two distinct media. Supposing that the refraction indices of the two media are 1.099 and 1.368, correspondingly, determine the ratio
By calculating both of the distances PM and MQ, illustrate that PM=QM (This shows that M lies on perpendicular bisector of line segment PQ, but it doesn't show that M actually lies on PQ)
Determine the frequency of the light emitted by a hydrogen atom during a transition of its electron from the n=4 to the n=1principal energy level. Where Hydrogen En= -2.18x1
A transverse wave on a string consists of an amplitude A. A tiny spot on the string is colored red. As one cycle of the wave passes by, determine the net distance traveled by the red spot?
Explain what would be the density of gaseous silane (SiH4) at 24 °C and 746mmHg? (mass/volume) Discuss in detail.
At one instant, force = 7.47 N acts on the 0.191 kg object which consists of position vector of (2.97 -2.97) m and velocity vector (-5.47 + 5.47) m/s. About the origin and in unit-vector notation, d
Determine the wave length of a neutron that has a velocity of 200. cm/s ( the mass of a neutron = 1.675 x 10-27kg.
Determine the mass of solution the student should use. A chemistry student requires 75 g of thiophene for an experiment. He has available 0.50 kg of a 29.3% w/w solution of thiophene in carbon tetr
Your friend consists of a near point of 121 cm, and she wears contact lenses that encompass a focal length of 37.0 cm. Explain how close can she hold a magazine and still read it clearly?
School wishes to build the wheel-chair ramp, with the incline of 15 degrees, from ground to door. How much horizontal distance is required for ramp?
The far point of a near-sighted person is 6.5 m from her eyes, and she wears contacts which facilitate her to see far-away objects clearly. A tree is 23.8 m away and 2.8 m high.
Half-life of iodine-123 is about 13 hours. You start with 1424 grams of iodine-123. Write the equation which gives amount of iodine-123 remaining after t hours.
A uniform disk turns at 1.8 about a frictionless spindle. A non-rotating rod, of the similar mass as the disk and length equivalent to the disk's diameter, is dropped onto the freely spinning disk.
At a later time t = 2.00 s, the particle is positioned at x = 8.50 m and y = 5.00 m. Determine constant force acted on the object throughout this time interval?
A satellite is one Earth radius over the surface of Earth. Explain how does the acceleration due to gravity at that position compare to acceleration at the surface of Earth?
The colony of bacteria grows exponentially. Colony starts with 3 bacteria, but 2 hours after beginning of experiment, it has grown to 780 bacteria. Write the formula for number of bacteria as the fu
Determine how broad are the first two bright fringes on either side of the central bright fringe? (State the width of a bright fringe as the linear distance from minimum to minimum.) Answer must be
You started with 400 grams of the radioactive element, and 7 days later it had decayed to 265 grams. Determine half-life of element?
A power plant generates electricity from bituminous coal having 40% efficiency. Electricity is transmitted to a house by 90% efficiency.
Primarily, two parallel waves are in phase containing a 500nm wavelength, reach a detector after one of the waves passes via a 10cm long block of glass having n = 1.5. Determine the total number of
A parallel-plate capacitor consists of an area of 5.00 cm2, and the plates are separated by 2.00 mm with air between them. The capacitor stores a charge of 500 pC. (i) Determine the potential differ
When the flatcar and cannon altogether encompass a mass of 36.0 metric tons (not comprising the projectile), determine the initial recoil speed of the flatcar?