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A block is attached to a spring with unknown spring constant oscillates with a period of 2.00 s. what is the period if (a) the mass is doubled? (b) the mass is halved? (c) the amplitude is doubled?
The decomposition of 2HI to H2 + I2 at 508C has a half like of135 min when the initial pressure of HI is 0.10atm and 13.5 min when the pressure is 1.00atm.
Two events occur in an inertial system K at the same time but 7 km apart. What is the time difference measured in a system K' moving between these two events when the distance separation of the even
Ignoring any change in the glass containing the mercury, what will be the height of the mercury column for the same one atmosphere of pressure when the temperature rises to 38.0 °C on a hot day?
You have two perfectly insulated cups. One contains water and the other contains an equal volume of another liquid that has half the density of water and twice the specific heat capacity.
An air-track glider attached to a spring oscillates between the 10 cm mark and the 60 cm mark on the track. the glider completes 10 oscillations in 33s. what are the (a) period, (b) frequency, (c)
Suppose you have a buffer at pH 5.0 that is 1.00 M in HX and 1.00 M in X- , where HX is a weak acid with Ka =1.0 x 10^(-5) M. Calculate the effects of adding 50 ml of 1.0 M HCl to a 1-liter portion
An angular function is given as theta = 17rad + 8 rad/s t - 0.4 rad/s3t3. a) What is the average angular velocity (w) from 0 to 5s? b) What is the instantaneous angular velocity (w) at 0 and at 5s?
Ammonia is commonly made form N2 and H2 bythe Haber process. Because the reaction reaches equilibrium before going completely to product, the stoichiometric amount of ammoniais not obtained.
You pass the patrol car 17 seconds after you initially applied the brakes and are relieved that he doesn't pull out after you. How far away was the highway patrol car when you first saw it?
You can estimate the diameter by knowing the tensile strength of steel cable is about 5 x 10^8 N/m. Furthermore, the mass of Earth is 6 x 10^24 kg and the mass of the moon is 7.4 x 10^22 kg. The ave
Calculate the concentration of nonelectrolyte solute particlesin human blood if the osmotic pressure is 7.53 atm at37oC, the temperature of the human body.
Heat loss through the walls amounts to approximately 860 kcal/h. If the air is to be maintained at 20°C, what minimum wattage must the heater have? (The specific heat of air is about 0.17 kcal/k
Calculate the mass in grams of urea that must be added to 150.g water to give a solution whose vapor pressure is 2.5mm Hg less than that of pure water at 40oC (vp H2O at 40oC=55.34mm Hg)
When a jet aircraft is taking off, the sound intensity level experienced by the crew member is 84 dB. What sound intensity level would the crew member experience if he removed the protective earplug
The source at the origin emits four times as much power as the other source. Where on the x axis are the two sounds equal in intensity?
The mass of a copper atom is 5.14 x 10-25 kg, and the density of copper is 8 920 kg/m3. so Find the edge dimension of each cube, which represents an estimate for the spacing between atoms ????
If 25.0 mL silver nitrate solution reacts with excessive potassium chloride solution to yeild 0.628 g precipitate, what is molarity of the silver ion in the original solution?
Water flows at 0.25 L/s through a 12-m-long garden hose 2.5 cm in diameter that is lying flat on the ground. The temperature of the water is 20 degrees C. What is the gauge pressure of the water where
The mass spectrum of an organic compound,C40H82 contains M+ and M+1 peaks. If we assume the intensity ofM+ peak 100, what would be the intensity of M+1peak? Note: Ignore any effect of higher isotop
A pump is used to empty a 4000 L wading pool. The water exits the 3.0-cm-diameter hose at a speed of 2.2 m/s . How long will it take to empty the pool?
Lemon juice is a complex aqueous solution that does not freeze in ahome freezer at temperatures as low as -11 °C. At what temperature will the lemon juice freeze if it effective molality is the
A 95 kg clock initially at rest on a horizontal floor requires a 650 N horizontal force to set it in motion. After the clock is in motion, a horizontal force of 560 N keeps it moving with a constant
The label of an antacid tablet bottle states that each tabletcontains 480 mg of CaCO3. A tablet weighs 1.40 g. What weight of the tablet will be required to use 20mL of0.050 M EDTA solution?
How much KNO3 must be added to 500ml of media solution such that it would contain 0.1 M KNO3? What is the equivalent in ppm?