• Q : Determining the size of the room...
    Chemistry :

    A room contains 3.9 x 10^4 grams of argon. If air has a density of 1.7 g/L and is 0.255% argon by mass, what is the size of the room?

  • Q : What is the speed of propagation of the wave...
    Physics :

    An electromagnetic wave with frequency 65.0 Hz travels in an insulating magnetic material that bas dielectric constant 3.64 and relative permeability 5.18 at this frequency. The electric field bas

  • Q : Freezing-point depression of the solvent...
    Chemistry :

    A solution is made by dissolving 25.5 grams of glucose (C6H12O6) in 398 grams of water. What is the freezing-point depression of the solvent if the freezing point constant is -1.86 °C/m? Show a

  • Q : What is the peak current produced...
    Physics :

    A generator rotates at 85.Hz in a magnetic field of 0.030 T. It has 1000 turns and produces an rms voltage of 150 V and rms current of 70.0 A. (a) What is the peak current produced?

  • Q : Problem based on perfect transformer...
    Physics :

    What should the output voltage of the transformer at the generating plant be for an overall transmission efficiency of 98.5% assuming a perfect transformer?

  • Q : Resulting distribution of the sample means...
    Basic Statistics :

    Find the mean and the standard deviation of the resulting distribution of sample means for n=36. The mean of the resulting distribution of the sample means is?

  • Q : How much money was invested at each rate...
    Finance Basics :

    You investes $8000 in two funds paying 2% and 5% annual interest. At the end of the year, the interest from the 5% investment exceeded the interest from the 2% investment by $85. How much money was

  • Q : Distance d between the charges...
    Physics :

    Two positive point charges, q1= +16x10-6 C and q2 = +4 x10-6 C, are separated by a distance 3 m. Calculate the distance d between the charges where the net electric field is zero.

  • Q : Problem related to heating mercury...
    Chemistry :

    Question: Pure oxygen was first made by heating mercury (II) oxide: 2HgO --> 2HgO2. How many grams of mercury and how many grams of oxygen are formed from 45.5 g of HgO?

  • Q : Find basic principle of heat transfer to obtain calorimeter...
    Chemistry :

    What is the basic principle of heat transfer applied to obtain the calorimeter heat capacity and heat of neutralization?

  • Q : Total amount of water supplied per hour...
    Basic Statistics :

    What is the total amount of water supplied per hour to the region inside the circle of radius R centered at the sprinkler?

  • Q : Thermal conductivity of the material...
    Physics :

    When the heat flow through until area of a sheet of insulating material of thickness 3.0mm is 8.0kWm-2 the temperature drop across the sheet is 100K. Calculate the thermal conductivity of the mater

  • Q : State type of reaction undergone by benzyl chloride...
    Chemistry :

    Benzyl chloride, C6H5CH2Cl, reacts with ethanolic KOH to form two products.give their identities and suggest how they are formed. State type of reaction undergone by benzyl chloride.

  • Q : Find an expression for the number of bacteria...
    Basic Statistics :

    A bacteria culture starts with 500 bacteria and grows at a rate proportional to its size. After 3 hours there are 8000 bacteria. (a) Find an expression for the number of bacteria after t hours.

  • Q : Determine the location of the image...
    Physics :

    An object 60cm tall is placed at different location in front of a concave mirror whose radius of curvature is 50cm. Determine the location of the image and its characteristics when the object is

  • Q : Expression for the terminal velocity...
    Physics :

    The terminal velocity of the raindrop is limt→∞ v(t). Find an expression for the terminal velocity in terms of g and k.

  • Q : Find air specific volume at initial-final-intermediate state...
    Chemistry :

    First undergoes constant PRESSURE process, followed by constant VOLUME process. FIND: air specific volume at initial, final, and both intermediate states.

  • Q : What is the specific heat of the metal...
    Chemistry :

    The temperature stopped changing at 29.40 C. What is the specific heat of the metal? The specific heat of water is 4.18 J/g K.

  • Q : Vertical movement of air critical to the formation...
    Science :

    Why is the vertical movement of air critical to the formation of clouds and precipitation? What role do adiabatic temperature changes play in these processes?

  • Q : Volume of inhaled air in the lungs...
    Basic Statistics :

    This explains, in part, why the function ƒ(t) = 1/2 sin (2πt/5) has often been used to model the rate of air flow into the lungs. Use this model to find the volume of inhaled air in the lung

  • Q : Find fixed volume by types of processes isobaric-isothermal...
    Chemistry :

    An ideal gas at a given state expands to a fixed volume by two types of processes: (i) isobaric, (ii) isothermal. For which case is the work done greater?

  • Q : Lower and upper estimates for the distance...
    Basic Statistics :

    The speed of a runner increased steadily during the first three seconds of a race. Her speed at half-second intervals is given in the table. Find lower and upper estimates for the distance that she

  • Q : Performance of the overall campaign...
    Basic Statistics :

    Each campaign is comprised of multiple mailings, and each mailing is measured in terms of the response rate, which is the number of consumers who respond to the mailing. The performance of the overa

  • Q : Find maximum height rocket will reach above launch pad...
    Physics :

    what is the maximum height this rocket will reach above the launch pad? How much time after engine failure will elapse before the rocket comes crashing down to the launch pad?

  • Q : Give upper and lower estimates for the quantity...
    Basic Statistics :

    Give upper and lower estimates for the quantity Q6 of erupted materials after 6 seconds.

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