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Calculate the change in the internal energy of the system? A system receives 174 J of heat and delivers 2,151 J of work to its surroundings.
A positive thin lens is employed to project the enlarged image of a slide onto a wall 10 m away. When the slide is 20 X 30 mm, and if its image is to be 2 X 3 m, what should be the focal length of t
Determine the equilibrium partial pressure of PCl5 in a 3.00 L vessel that was found to contain the .03 atm of PCl3 and .03 atm of Cl2 the equilibrium.
The fact that photons hitting a metal will release electrons is the quintessence of the photoelectric effect. When the minimum energy needed to free a photoelectron from sodium is 1.8 eV, determine
Determine the final temperature of the part (°C) if 290 g aluminum engine part at an initial temperature of 28.0°C absorbs the 3,189 J of heat.
The isotropic point source radiates uniformly in all directions. When the electric field amplitude at 10 meters from the source is calculated to be 10 V 1m, find out the radiant flux (power).
Calculate the empirical formula of the oxide and write down a balanced equation for the reaction of molecular oxygen and the phosphorus on the basis of this empirical formula.
If thermostat reads 15 degrees celsius after four minutes, what will it be after being in room for 6 minutes? and for 11 minutes?
A focused CO2 laser beam putting out a continuous wave (λ0 = 10,600 nm) of 3 kW is able of burning a hole via a quarter-inch thick stainless steel slab in around 10 seconds. Find out the irra
Calculate the concentration of Oxygen in the water when the oxygen is dissolved in the water with the total pressure of gas (Oxygen + water vapor) over the water being 3.20 atm. The temperature is
Determine the enthalpy of formation (ΔHo) for Na (Sodium in solid state)? Isn't it zero, because it's in its stable form? However, it looks like it's not zero. Can somebody confirm this?
For series circuits, let consider configurations having 3 resistors of no less than 1 ohm each. Show instance computations with a net voltage of no more than 15 volts. Determine the voltages and cur
A sample which is having 0.6911-g of impure strontium carbonate, SrCO3, is decomposed with the HCl. The resulting liberated CO2 is collected on the calcium oxide and weighs 0.1745 g.
Determine what would the elastic modulus of glass have to be to support the transmission of light waves at a speed of v = 2.21 x 108 m/s? (For comparison: the real elastic modulus of window glass is
Calculate the molar heat capacity of benzene at the constant pressure? It takes 330 Joules of energy to raise the temperature of 24.6g of benzene from the 21.0°Cto 28.7°C at constant pressu
3-Magnesium burns in air to form the magnesium nitride, Mg3N2 and magnesium oxide, MgO. Magnesium nitridereacts with water to give ammonia.
The track and field playing area is in shape of the rectangle with semicircles at each end. Inside perimeter (rectangle part) of track is to be 1200 meters. What must dimensions of rectangle be so
A solution is prepared by mixing the 90 ml of 5.00M HCL and 30 ml of 8.00M HNO3. Determine the added until the final volume is 1.00L. Determine H+ and OH- and the pH for this solution.
The resistor and an inductor are joined in series to the ideal battery of constant terminal voltage. At the moment contact is made with the batter, the voltage across the resistor be?
Aerosol cans have a label that warns the user not to use them above a certain temperature and not to dispose of them by in cineration. Even an empty can contains residual gaseous propellant.
A coil lies flat on the table top in an area where magnetic field suddenly grows stronger. If viewed from above, determine the direction of the induced current in this coil as the field reduces?
Suppose you are investigating a murder, the coroner determines the body temperature of cadaver and finds it to be 34°C.
A resistor L is located in series with resistor R. The combination is placed in parallel with the other resistor R and a DC battery having voltage E. The net current leaving the battery at the momen
Assuming all the steam is converted to water; explain what would be the final temperature of the system, the heat transferred from the water to copper, and the entropy change of the water, copper, a
Determine the total pressure of a mixture of 0.0335 mol of helium, He, and 0.0240 mol of oxygen, O2, in a 4-L flask at20°C.