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Typical white dwarf stars ate composed of material with a bulk modulus of 1.33 x 1022 Pa and a density of 1010 kg/m3. They have radii equal to 9.0 x 10-3 solar radius. What is the approximate pulsat
The booming apparently results from a periodic oscillation of the sliding layer of sand-the layer's thickness expands and contracts. If the emitted frequency is 90 Hz, what are:
An ambulance with a siren emitting a whine at 1,600 Hz overtakes and passes a cyclist pedaling a bike at 2.44 m/s. After being passed, the cyclist hears a frequency of 1590 Hz. How fast is the ambul
The other end passes over a pulley and supports a 1.5D-kg mass. The linear mass density of the rope is 0.0550 kg/m. (a) What is the speed of a transverse wave on the rope?
With what tension must a rope with length 2.50 m and mass 0.120 kg be stretched for transverse waves of frequency 40.0 Hz to have a wavelength of 0.750 m?
A 65-kg person jumps from a window to a fire net 18m below, which stretches the net 1.1m. Assume that the net behaves like a simple spring, and (a) Calculate how much it would stretch if the same pe
What is the mode of reaction of an acid buffer. Make list of industrial applications of buffers with clear explanation.
A small fly of mass 0.25 g is caught in a spider's web. The web vibrates predominately with a frequency of 4.0 Hz. (a) What is the value of the effective spring stiffness constant k for the web?
Schottky vacancies suppose that the energy required to remove a sodium atom from the inside of a sodium crystal to the boundary is 1eV. Calculate the concentration of Schottky vacancies at 300K.
What are the unique features of the frogs reproductive system that can distinguish it from other specimens? What advantages do these unique features offer your specimen?
Discuss the implications for monetary and fiscal policy of the decline in the terms of trade. Make use of diagrams in your answer.
You will explain in detail the principles and laws of electrodynamics under which Maglevtrains operate. You will describe propulsion, guidance and levitation(250 word min for each question):
A piano wire with mass 3.00 g and length 80.0 cm is stretched with a tension of 25.0 N. A wave with frequency 120.0 Hz and amplitude 1.6 mm travels along the wire. (a) Calculate the average power ca
The members of a flying club plan to share equally the cost of a $200,000 airplane. The members want to find five more people to join the club so that cost per person will decrease by $2000. Using a
A balloon filled with helium has a volume of 1.0 x 10-3 L at 20 degrees celcius. what will be the balloons volume at 30 degrees celcius, if the pressure remains constant?
In many situations, the quality of the air we breathe can determine the state of our health. Describe the problem and discuss its importance, using specific statistics and references.
A light plane is headed due south with a speed relative to still air of 185 km/h. After 1 h, the pilot notices that they have covered only 135 km and their direction is not south but 75 degrees sout
Question: Assume you are dealt two cards successively (without replacement) from a standard 52-card deck. (In this section give your answers as percents rounded to one decimal place.)
At equilibrium, 2.15 moles of NH3 was present. Calculate the number of moles of nitrogen and hydrogen at equilibrium.
The length and width of the floor of a room are each 12 meters. The height is 4 meters. A spider, on the floor in a corner, sees a fly on the ceiling in the corner diagonally opposite it.
A point is moving on the perimeter of a circle of radius 1 at the rate of 0.1 radians per second. How fast is its x coordinate changing when x = 0.5? How fast is its y coordinate changing at that ti
A basket contains 15 red numbered balls and 10 white numbered balls. A sample of five balls is selected. How many samples contain three red balls and two white balls? Explain your answer.
What three patterns of natural selection of polygenic traits. Which one leads to two distinct phenotypes?
During thieir first year of renting, they paid $600 per month. If their rent was increased by .5% for each year after that, what is the total amount of money they have paid in rent over the past 6 y
Calculate the percent composition of sodium in sodium chloride. Tom Yum soup contains 420 mg sodium and 30 mg potassium in each 200 g serve.