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While looking through the Mt. Palomar telescope, you discover a large planetary object orbited by a single moon. calculate the density of Planet Hephaestus
A bucket is filled with a combination of water (density 1000 kg/m3) and oil (density 700 kg/m3). what is the pressure at the interface between the oil and the water
Hail comes straight down at a mass rate of m/?t = 0.080 kg/s and an initial velocity of v0 = -16 m/s and strikes the roof perpendicularly. calculate the force exerted by the hail on the roof
A baseball pitcher delivers a fastball that crosses the plate with an angle of 5.77 degrees relative to the horizontal and a speed of 87.9 mph. What is the magnitude of the impulse received by the b
In an EM wave traveling west, the B field oscillates vertically and has a frequency of 88.0kHz and an rms strength of 6.35×10?9T
An 86lb net force is applied to a 42 Kg object at an angel. Determine the object's acceleration magnitude and direction
A baseball outfielder throws a 0.15 kg baseball at a speed of 40 m/s and an initialangle of 30?. What is the kinetic energy when it hits the ground
A tug of war is held between two teams of five men each. The mass of each man is 80 kg and he can initially pull on therope with a force of 1000 newtons. find the position of the teams as function o
When a hammer strikes a nail, it is compressed along its length. What is the impulse imparted to the hammer
A certain light bulb has a tungsten filament with a resistance of 19 ohms when at 20 degrees celsius and 140 ohms when hot. Find the temperature of the hot filament
Consider a spring of stiffness k and mass m. If we stretch - simultaneously - both ends of the spring by force F1 and F2. What will be the elongation of the spring
The chlorination of pentane gives you a mixture of 1-chloropentane, 2-chloropentane, and 3-chloropentane. What are the ratios most to least that these products will be formed
A charged isolated metal sphere of diameter 16.0 cm has a potential of 7000 V relative to V = 0 at infinity. Calculate the energy density in the electric field
A pendulum of period 2s is released from rest at an inclination of 5 degrees to the (downward) vertical. Find it's subsequent angular position as a function of time
A solution of Na3PO4 is added dropwise to a solution that is 0.0494 M in Ag+ and 0.00318 M in Cu2+. The Ksp of Ag3PO4 is 8.89e-17. The Ksp of Cu3(PO4)2 is 1.4e-37. (a) What concentration of PO43- is
Calculate the solubility-product constant for Zn3(AsO4)2. Ksp = (c) The Ksp of Ag2CO3 at 25 oC is 8.46e-12. What is the molar solubility of Ag2CO3? solubility = mol/L
Consider the titration of 50.0 mL of 0.0500 M H2NNH2 (a weak base; Kb = 1.30e-06) with 0.100 M HClO4. Calculate the pH after the following volumes of titrant have been added: (a) 0.0 mL pH = (b) 6.3
A buffer solution contains 0.23 mol of carbonic acid (H2CO3) and 0.55 mol of sodium hydrogen carbonate (NaHCO3) in 2.10 L. The Ka of carbonic acid (H2CO3) is Ka = 4.3e-07. (a) What is the pH of this
In a slow-pitch softball game, a 0.200-kg softball crosses the plate at 20.0 m/s at an angle of 40.0° below the horizontal. Determine the impulse delivered to the ball
A bullet is fired into a large stationary absorber and comes to rest. Temperature measurements of the absorber show that the bullet lost 2060J of kinetic energy, What is the mass of the bullet
A critically damped simple harmonic oscillator starts at the origin at rest, and is subject to an additional force Fext = Fto/t. Find the subsequent motion
The unit of S was the J/(mol*K) the book said. But, in delta S, why the unit is J/K? I just think when I want to calculate delta S, sum of products's S - sum of reactants's S, so the unit of delta S
A rocket traveling 1850 m/s away from the Earth at an altitude of 6800 km fires its rockets, at what rate must the gases be ejected
You have an uncharged capacitor (12 x 10-6 F) and a resistor (1000 ohms) connected to a battery of 200 V at time t = 0, What is the final charge on the capacitor
(a) Calculate the percent ionization of 0.00190 M acetic acid (Ka = 1.8e-05). % ionization = % (b) Calculate the percent ionization of 0.00190 M acetic acid in a solution containing 0.0710 M sodium