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A cylindrical copper cable carries a current of 1290 A. There is a potential difference of 1.60 10-2 V, What is the radius of the cable
"Air" bags for automobiles are inflated during a collision by the explosion of sodium azide, NaN3. The equation for the decomposition is 2NaN3(s) ? 2Na(s) + 3N2(g). What mass of sodium azide would be
If we inject 120.0 mL of liquid helium and allow the entire system to warm to room temperature (25°C), what is the pressure inside the bottle
A model rocket blasts off and moves upward with an acceleration of 15m/s^2 until it reaches a height of 35m, what is the total duration of the rocket's flight
A first order chemical reaction has a rate constant of 5.8×104 s-1 at 10 °C and a rate constant of 4.7×105 s-1 at 64 °C. Calculate the activation energy, Ea, for the reaction.
A vertical wall (7.2 m 2.8 m) in a house faces due east. A uniform electric field has a magnitude of 150 N/C. What is the electric flux through the wall
If a temperature increase from 19.0 to 37.0 triples the rate constant for a reaction, what is the value of the activation barrier for the reaction
Lead(II) sulfide reacts with hydrogen peroxide to form lead(II) sulfate and water. How many grams of hydrogen peroxide (H2O2) are needed to react completely with 265 g of lead(II) sulfide
Calculate the pH after the addition of 0.0 mL, 5.0 m, 10,0 mL, and 20,0 mL NaOH. At each of these three points, indicated by formula the chemical species present in solution
An ionic compound contains only a metal, M, and bromine. If analysis indicates that a 3.61 g sample of the compound contains 2.44 g of M, what mass of Br in g is contained in 344 g of the mineral
Cations are removed from the exchange complex of a 1 kg oven-dry soil sample by ammonium (NH4+) substitution. What is the cation exchange capacity of the soil
The drug amphetamine, C6H5CH2CH(CH3)NH2, Kb = 7.8 multiplied by 10-4, is usually marketed as the hydrogen bromide salt, C6H5CH2CH(CH3)NH3+Br
A projectile is launched at an angle of 60o with respect to the horizontal from the edge of a cliff which is 100 m high. Its initial speed is 30 m/s. find the displacement vector for the motion of t
A 1.50mm -diameter glass bead is positively charged. The potential difference between a point 1.50mm from the bead, What is the charge on the bead
A defibrillator is used during a heart attack to restore the heart to its normal beating pattern. How many electrons pass through the wires connected to the patient
On a spacecraft, two engines are turned on for 730 s at a moment when the velocity of the craft has x and y components of velocity v0x = 4040 m/s, Find the x and y components of the craft's accelera
The mirrors used in a particular type of laser are 99.99% reflecting. What is the force due to radiation pressure on one of the mirrors
The intensity of sunlight striking Earth's upper atmosphere (called the solar constant) is 1.35 kW/m2. Find the radiation pressure at the surface of the sun
What is the pH of a solution resulting from the dissolution of 2.09 g of NH4Br in water to form 0.371 L of solution
The rms value of the electric field in an electromagnetic wave is Erms = 480 V/m. Find the average energy density
A 9.1 g sample of C6H5NH3Cl is dissolved in water to make 346 mL of solution. Determine the percentage deprotonation of the cation.
A rock climber throws a small first aid kit to another climber who is higher up the mountain. What is the vertical height between the two climbers
Some watch dials are coated with a phosphor, like ZnS , and a polymer in which some of the first H atoms have been replaced by third H atoms, tritium.
A parallel plate capacitor is connected to a battery. The space between the plates is filled with air. Find the electric field inside the dielectric
At some point in its orbit, our asteroid is moving with a speed of 20 kilometers per second. Determine the kinetic energy of the asteroid