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The electric output of a power plant is 730MW . Cooling water flows through the power plant at the rate 1.30 ×108L/hr. What is the power plant's thermal efficiency
A passenger on a stopped bus notices that rain is falling vertically just outside the window. Find the speed of the raindrops, given that the bus is moving with a speed of 17.2 m/s
A passenger walks from one side of a ferry to the other as it approaches a dock. what are the direction and magnitude of the ferry's velocity relative to the water
An electromagnetic wave has an electric field given by E? (y,t)=[ 3.60×105V/m cos(ky?(1.250×1013rad/s )t)]k^. In which direction is the wave traveling
An electron in a 1-D box of length 0.100 nm, Find the energies of the four lowest states that have energies above the ground states
A photon is emitted when a hydrogen atom undergoes a transitionfrom the n = 5 state to the n = 3 state. Calculate the energy (in electron volts) of the emitted photon
On a warm summer day in Athens, the temperature is 33C (dry bulb temperature) and the relative humidity is 60%. What is the absolute humidity (kg/kg Dry air)
In a mass spectrometer, a singly charged ion having a particular velocity is selected by using a magnetic field of 0.10 T , What is the mass of the ion
An automobile tire is inflated with air originally at 10.0°C and normal atmospheric pressure. During the process, What is the tire pressure in pascals
Calculate the percent by mass of potassium nitrate in a solution made from 45.0 g KNO3 and 295 mL of water. Density of water is 0.997 g/mL.
A beaker with 175 mL of an acetic acid buffer with a pH of 5.000 is sitting on a benchtop. The total molarity of acid and conjugate base in this buffer is 0.100 M. A student adds 8.60 mL of a 0.340
A magnifying glass uses a converging lens with a focal length of 15.5 cm. It produces a virtual and upright image that is 3.3 times larger than the object. How far is the object from the lens
The density of Cesium Chloride solid is 3.99 g/cm^3, and the radius of the Cs- ion is 181pm. What is the radius of the Cs+ ion in the center of the cell
Suppose a tank contains 826 m3 of neon (Ne) at an absolute pressure of 1.01×105 Pa. What is the increase in the internal energy of the neon
A cart is moving horizontally along a straight line with constant speed of 30 m/s. At what speed(relative to the cart), and angle must the projectile be fired
A solution of 1-pentanol and butanoic acid in ether is shaken with aqueous sodium bicarbonate (NaHCO3) solution. Which of the following correctly describes the major organic contents of the two solu
If the pressure of the 1.8-cm3 volume is reduced to 1.8 × 10?11 Pa (an extremely good vacuum) while the temperature remains constant, how many moles of gas remain in the container
In a combustion experiment, .73g of an unknown hydrocarbon was burned in the presence of excess oxygen. This reaction produced .452 g CO2 and .087 g H2O. How many moles of carbon were in the origina
A large tank is filled with methane gas at a concentration of 0.690 kg/m3. What is the cross-sectional area of the pipe
Use VSEPR theory to decide which one of the following molecules and ions will definitely have at least one 90º bond angle in it.
Firemen are shooting a stream of water at a burning building. A high-pressure hose shoots out the water with a speed of 23.0m/s as it leaves the hose nozzle. How high above the ground does the water
A solution contains 0.35 mol of isopropanol (C3H7OH) dissolved in 0.85 mol of H2O. What is the molarity of this solution
If the gas pressure and volume both double, what's the change in internal energy, find the internal energy of 1mol of oxygen at 291K and 1.0 atm
Nitrogen forms several gaseous oxides. One of them has a density of 0.869 g L-1 measured at 764 mmHg and 150°C. Write the formula of the compound.
0.023mol of a diatomic gas, with initial temperature 25?C, How much heat is added during this process