• Q : Acceleration and deceleration problem....
    Physics :

    A hotel elevator ascends 160 {rm m} with a maximum speed of 4.5 {rm m/s}. Its acceleration and deceleration both have a magnitude of 1.3 {rm m/s^2}. How long does it take to make the complete trip

  • Q : Empirical formula of the compound....
    Physics :

    You burn 0.0956 g of the compound and isolate 0.1356 g of CO2 and 0.0833 g of H2O. What is the empirical formula of the compound?

  • Q : What minimum mass of water....
    Physics :

    What minimum mass of water (in {rm g}) has to evaporate to absorb 173 {rm kJ} of heat?

  • Q : Base of the slide and the splashdown point of the person....
    Physics :

    If the height of the water slide in Figure 8-26 is h = 3.4 m and the person's initial speed at point A is 0.52 m/s, what is the new horizontal distance L between the base of the slide and the splas

  • Q : Order of increasing basicity....
    Physics :

    List the solutions in order of increasing basicity: nh2oh, c2h5nh2, nano2

  • Q : Find the magnitude of the net force acting on the ball....
    Physics :

    When a 58 g tennis ball is served, it accelerates from rest to a speed of 45 m/s. The impact with the racket gives the ball a constant acceleration over a distance of 44 cm. What is the magnitude of

  • Q : Electron geometry of sbr4....
    Physics :

    What is the electron geometry of SBr4 What is the electron geometry of SBr4

  • Q : Find two values for the molarity....
    Physics :

    A 20.00mL sample H3Y was titrated with 0.1000 M NaOH. The first equivalence point was reached after the addition of 14.98 mL of base. The second equivalence point was reached after the addition of

  • Q : Symbolize the flow of electrons....
    Physics :

    Using curved arrows to symbolize the flow of electrons, propose a mechanism for the transformation of 3-nitrophthalic acid to luminol?

  • Q : Determining the initial concentration....
    Physics :

    What effect does initial concentration seem to have on the percent dissociation?

  • Q : Daredevil on a motorcycle leaves the end of a ramp....
    Physics :

    A daredevil on a motorcycle leaves the end of a ramp with a speed of 28.0 m/s as in the figure below. If his speed is 26.4 m/s when he reaches the peak of the path, what is the maximum height that h

  • Q : What is the heat absorbed....
    Physics :

    In a calorimeter, 10 g of ice absorbs heat with an enthalpy of fusion of 334 J/g. What is the heat absorbed?

  • Q : Solution of the same substance....
    Physics :

    If a 0.0200 M solution exhibits 50.0% transmittance, what will be the percent transmittance for a 0.0400 M solution of the same substance measured at the same wavelength?

  • Q : Sample of gas....
    Physics :

    Suppose that a sample of gas occupies 192 mL of volume at 25C and a pressure of 206 torr. What would be the volume if the pressure were changed to 506 torr at 25C?

  • Q : What is the velocity of the second block....
    Physics :

    The mass of the first block is 1224 g, and its velocity is +0.685 m/s after the bullet passes through it. The mass of the second block is 1555 g. (a) What is the velocity of the second block after t

  • Q : What will be the final temperature of the water in cavity....
    Physics :

    If 43 g of hot water at 85°C is poured into a cavity in a very large block of ice at 0°C, what will be the final temperature of the water in the cavity?

  • Q : Calculate the standard cell potential....
    Physics :

    Calculate the standard cell potential (E^circ) for the reaction rm X {(s)}+ rm Y^{+}{(aq)} rightarrow rm X^{+}{(aq)}+ rm Y {(s)}

  • Q : Cistrans isomerism....
    Physics :

    Which of the following alkenes can exhibit cistrans isomerism?

  • Q : What is the train acceleration after wheel starts to stick....
    Physics :

    A toy train is pushed forward and released at = 2.0 with a speed of 1.5 . It rolls at a steady speed for 2.8 , then one wheel begins to stick. The train comes to a stop 5.6 from the point at which i

  • Q : Draw the skeletal structure....
    Physics :

    Draw the skeletal structure of one of the enantiomers (that means you have to show wedge/dash bond(s)) formed when (Z)-3-methyl-2-pentene reacts with Br2 in the presence of water.

  • Q : What is the molar solubility....
    Physics :

    What is the molar solubility of NiS in 0.10 M NH3?

  • Q : Estimate the value of the equilibrium constant....
    Physics :

    Estimate the value of the equilibrium constant at 610K for each of the following reactions delta H and delta S for BrCl(g) is 14.6 kj=J/mol and 240 J/(mol*K) respectively

  • Q : Coefficients of static and kinetic friction....
    Physics :

    The coefficients of static and kinetic friction between a 67 kg box and a horizontal surface are 0.56 and 0.32, respectively.

  • Q : Find the distance at which the block hits the floor....
    Physics :

    A 15 g bullet traveling at 485 m/s strikes a 0.9 kg block of wood that is balanced on a table edge 0.7 m above ground. If the bullet buries itself in the block, find the distance D at which the blo

  • Q : How much kinetic energy is lost....
    Physics :

    The block, of mass 1.14 kg, is subject to no horizontal external forces during the collision with the bullet. After the collision, the block is observed to move at a speed of 4.50 m/s. How much kin

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