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The hot reservoir of a heat engine is steam at 100?C while the cold reservoir is ice at 0?C. In 1.2hrof operation, 11kg of steam condenses, What is the power output of the heat engine
A vector has components of 10.0 units along the x axis and 11.0 units along the y axis. What is the magnitude of the vector
Desperate for money, you take a scary job climbing a very tall 2.640 hm high tower to make a repair. How far away are they in feet from the tower bottom
Three 10.53-g Styrofoam balls of radius 2 cm are coated with carbon black to make them conducting, Determine the absolute value of q
A red blood cell typically carries an excess charge of about -2.5 × 10-12 C distributed uniformly over its surface. What is the surface charge density on the red blood cell
What is the total charge of the uranium nucleus? (The neutral uranium atom has 92 electrons.), What is the magnitude of its electric field at a distance of 1.48×10-10 m from the nucleus
An electric field E with an average magnitude of about 150 N/C points downward in the atmosphere near Earth's surface. What charge (both sign and magnitude) must be used
Sgt Jay sits in a hovercraft 35.2 m above the surface of the planet Bai. The acceleration due to gravity at the Bain surface is 5.67 m/s^(2) down. What is Jay's velocity at t = 4.32s
consider a model rocket that is lunched in a vertical direction. Nelected air resistance and changes in its mass , m. determine the mamimum alttiude
1) the symbols for the elements in the compound. 2) the oxidation numbers of the elements involved and write them as superscripts to the right of the elemental symbols
The volume of a gas is 2.50 L, measured at 1.00 atm. What is the pressure of the gas in mmHg if the volume is changed to 9.41 L
A solution of a specific vitamin has ?max = 223 nm and a concentration of 8.31 × 10-7 M. The absorbance of the solution at 223 nm is A = 0.180. What is the molar absorptivity of the vitamin at
Consider a single photon with a wavelength of a frequency of and an energy of E. What is the wavelength, frequency, and energy of a pulse of light containing 100 of these photons
Even if the temperature and kinetic energy are equal in a substance, does that guarantee that every molecule in said substance contain the exact same amount of energy
At 46°C a sample of ammonia gas exerts a pressure of 5.3 atm. What is the pressure when the volume of the gas is reduced to one-eighth (0.125) of the original value at the same temperature
A gas occupying a volume of 155 mL at a pressure of 0.970 atm is allowed to expand at constant temperature until its pressure reaches 0.541 atm. What is its final volume
Why must we know both in order to explain the physical properties of the molecule. physical properties to be considered are solubility and the points when the molecule changes states
The mass of a copper atom is 1.06 x10^25 kg, and the density of copper is 8 920 kg/m3. Find the edge dimension of each cube
Consider the following reaction in a closed reaction flask. If 1.50 atm of gas A is allowed to react with 0.500 atm of gas B and the reaction goes to completion at constant temperature and volume
Why do oxyacids become stronger when more oxygens are added. (as in the case of HNO2 being much weaker than HNO3)
Why is it impossible to know both the position and velocity of an atom (i.e. electron). It states this in the Heisenberg uncertainty principle...but why
the density of octane is .703 g/mL the efficiency of burning both is identical will anyone actually save money using ethanol (cost around $0.83 per liter) compared to gas at $1.10 per liter
If iron(III) oxide has a crystal structure that is face-centered cubic in iron ions, how many oxide ions are in one unit cell of iron(III) oxide.
A pot is made out of iron (mass=11 kg and SH capacity of .4498 J/g degree celcius) and you have 1 liter of pure water, starting with H20 at exactly 15 celcius and wanting to get it to boik