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A ladder 5.6 m long leans against a wall inside a spaceship. From the point of view of a person on the ship, Find the angle the ladder makes with the floor
During a ballet performance a ballerina leaps into the air. If the dancer leaped at 90 degrees, what was the dancers initial speed
In order to calculate the number of ways of arranging a given amount of energy in a tiny block of copper, How many atoms are in the copper block
In the reaction below, 7.57 atm each of H2 and Br2 were placed into a 1.00 L flask and allowed to react: H2(g) + Br2(g) <=> 2 HBr(g) Given that Kc = 11.8, calculate the equilibrium pressure of
A ski jumper starts from rest 50.0 m above the ground on a frictionless track and flies off the track at an angle of 45.0° above the horizontal, What is her speed when she leaves the track
Rank the compounds on relative acidities: H2O, H2C=CH2, NH3, HC(triplebond)CCH3, H3CCH3 (STRONG-->WEAK)
Two different simple harmonic oscillators have the same natural frequency (f=7.10 Hz) when they are on the surface of the Earth. Calculate the new frequency of the pendulum
show an example of your Ka or Kb calculation for NaC2H3O2 given that the measured pH is 7.20 and the [H+] is 6.3 x 10^-3
What is the activation energy for the reaction shown below k=1.89x10^-8 /s at 540 K and 2.45 x 10^-7 at 601 K
Two parallel wires lie in the plane of the paper with equal magnitude 5.0 A currents in the opposite direction. find the magnitude and direction of the magnetic field
calculate what volume of each 0.50M solution should be mixed to give a total volume of 50.0mL AND the reactants in the correct stoichiometry. Also write a data table in the space given
A world champion hammer thrower, rotates at a rate of 3.5 revolutions/sec just prior to releasing the hammer. What was the linear velocity of the hammer at release
A wheelchair athlete is training on a stationary ergometer. Her wheel's angular velocity is 3 rev/s and diameter is 80.0 cm. What is the linear velocity at the wheel's center
The amino acid alanine is shown below in several different Fischer projections. Sort the structures according to whether the Fischer projection represents alanine with the R configuration or alanine
The linear coefficient of thermal expansion for concrete is 12x10^-6 ºC^-1. Consider a slab of concrete which is 4.0 m long at 0.0 ºC. What seems to be the primary safety concern in the lab
Calculate the masses of conjugate acid and base to prepare the buffer. Calculate the volume of strong acid or base needed to prepare the buffer.
A person with a weight of 273.6 lb stands on two feet with their weight equally distributed between the two shoes, What is the pressure on each shoe independently
What is the reduced pressure of the gas. What is the pressure inside the gas cylinder? (Absolute Pressure). What should the pressure gauge read
Which of the following elements would you predict to have an anomalous electron configuration? A) Se B) Ce C) Ag D) Sr
A circuit contains two elements, but it is not known if they are L, R or C. The current in this circuit when connected to a 137 V, What are the two elements
The rate constant for the second order reaction 2NO2 ???&??; N2O4 is 2.79 L/mol •min at 48 oC. If the initial concentration of NO2 is 1.05 M , what is the half-life
A generator is connected to a resistor and a 0.032-H inductor in series. Determine the resistance of the resistor in this circuit
What is the balanced chemical equation for the reaction used to calculate Delta H f of SrCO3(s) ? If fractional coefficients are required, enter them as a fraction
The combustion of ethene, C2H4 , occurs via the reaction C2H4 (g) + 3O2(g) ===> 2CO2(g) + 2H2O(g) with heat of formation values given by the following table
The value of the gas constant is 0.08206 L x atm/(mol x K). You may also find the conversion factors 1 atm = 760 torr and Tk = Tc + 273 useful.