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An AC source with Vrms = 15V is connected in series with resistor R = 15?, a capacitor C = 100?F, What is the average power dissipated from the source
Liquid nitrogen has a density of 0.808g/ml at 77 K. A sample of 2.5 L of liquid nitrogen is allowed to evaporate at 21°C and 1.00 atm of pressure. what volume will the nitrogen gas occupy?(keep
Monochromatic light falls on two very narrow slits0.042mm apart. Successive fringes on a screen6.50m away are 8.4cm apart near the center of the pattern. Determine the frequency of the light.
A11.6 g sample of a certain gas was introduced into a constant volume container at 25 °C. if the container were heated to 175 °C, how many grams of gas must be vented from the container to k
We accelerate electrons between two parallel plates a few cm apart. We apply 2.05 MV across the plates. Find the momentum of the electron
Calculate the % atom economy for the following two methods for converting benzene, C6H6, to aniline, C6H5NH2.
Blood alcohol content (BAC) is often reported in weight-volume percent (w/v%). For example, a BAC of 0.08% corresponds to 0.08 g CH3CH2OH per 100 mL of blood.
A 3.00-m length of wire is held in an east-west direction and moves horizontally to the north with a speed of 0.440 m/s. Calculate the magnitude of the induced emf between the ends of the wire. (in &m
An object is located 8.00 cm from a converging lens that has a focal length of 10.0 cm. The height of the object is 0.67 cm. What is the height hi of the image
Solid benzoic acid, C6H5COOH(s), is often used to determine the heat capacity of a bomb calorimeter, because the constant volume heat of combustion of this compound is known with high precision: qV
Use these data, plus the information given below for CO2 and H2O, to estimate the standard enthalpy of formation, ofH?, at 25 oC for this compound. ofH? values at 25 oC for CO2(g) and H2O(l) are ?39
A Breathalyzer instrument contains two ampules, each of which contains 0.75 mg K2Cr2O7 dissolved in 3 mL of 9 mol L?1 H2SO4(aq). One of the ampules is used as reference. When a person exhales into t
he density of free electrons in gold is 5.90x10^28 m^-3. The resistivity of gold is 2.44x10^-8 ohms.m at a temperature of 20 C, what is the drift velocity of the electrons in the wire
In a separate experiment, it was found that, for fixed temperature and pressure, a 0.100 L sample of this compound takes 1.97 times longer to effuse than does a 0.100 L sample of Ar(g). What is the
A horizontal 790-N merry-go-round of radius 1.20 m is started from rest by a constant horizontal force of 45 N, Find the kinetic energy of the merry-go-round after 5.0 s
What was the percentage by mass of Mg(OH)2 in the original sample? [Hint: When Mg(OH)2 or Al(OH)3 reacts with HCl(aq), the products are a chloride salt, water and CO2(g). Assume that all of the CO2(
When only a resistor is connected across the terminals of an ac generator (117 V) that has a fixed frequency, there is a current of 0.490 A in the resistor. calculate the impedance of the series com
What will be the effect on your final %carbonate if a drop of HCl is spilled, and is not delivered to the test tube? Explain reasoning.
A cooling fan is turned off when it is running at 880rev/min . It turns 1000 revolutions before it comes to a stop. What was the fan's angular acceleration, assumed constant
how do you calculate the effective temperature of jupiter if the sun is its only source of heat given that jupiter is 7.8*10^8 km from the sun and has an albedo of 0.73
A truck has its front wheels (only) driven onto a scale and a reading of 3000 kg is obtained. How far is the center of gravity from the front wheels
A 990-kg sports car collides into the rear end of a 2100-kg SUV stopped at a red light. The bumpers lock, the brakes are locked, What was the speed sports car at impact
If the earths average temperature is 288K,what fraction of the atmosphere absorbed infrared radiation? what is the temperature of this atmospheric layer? if this fraction increased 5% what would be
A 330-N sphere 0.20 m in radius rolls without slipping 6.0 m down a ramp that is inclined at 34° with the horizontal
A soft drink contains 39mg of sodium in 286g of .H2O What is the concentration of sodium in the soft drink in mass percent