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Suppose a car battery provides 14 Volts when not in use. When the starter cranks, it draws 100 Amps, Find the Thevenins equivalent circuit for this battery
When a 5.49-g sample of gaseous hydrogen bromide dissolves in 33.0 g of water in a coffee-cup calorimeter (see above figure) the temperature rises from 21.00 oC to 62.66 oC. Calculate H in kJ/mol HB
A 60 kg woman in an elevator is accelerating upward at 1.2 m/s^2. what is the normal force pushing upward on her feet
Calculate DE, and determine whether the process is endothermic or exothermic for the following cases: A system releases 43 kJ of heat to the surroundings and has 665 kJ of work done on it by the surro
Three equal positive point charges of magnitude Q = 6.00? C are located at three corners of a square of edge length d = 2.6 cm, What is the magnitude of the attractive force
A 30-meter steel tape is correct at a temperature of 20.0(C). The distance between two points, What is the true distance between the points
Based on activation energies and energy changes and assuming that all collision factors are the same, answer the following questions- Which of the following reactions would be fastest in the forward
An explorer is caught in a whiteout (in which the snowfall is so thick that the ground cannot be distinguished from the sky) while returning to base camp. How far (in km) must he now travel to reach
An electric vehicle starts from rest and accelerates at a rate of 1.7 m/s2 in a straight line until it reaches a speed of 27 m/s. How much time elapses from start to stop
A reaction takes place inside a constant volume or BOMB calorimeter. Pressure is not constant during the reaction. The heat absorbed by the calorimeter is measured to be +15J.
A sample of ammonia gas is completely decomposed to nitrogen andhydrogen gases over heated iron wool. If the total pressure is 603mmHg, calculate the partial pressure of N2 and H2
The position function x(t) of a particle moving along an x axis is x = 4.0 - 4.5t2, At what positive time does the particle pass through the origin
A reaction takes place inside a constant pressure calorimeter. The heat absorbed by the calorimeter is measured to be +15J.
Which of the following reactions is the formation reaction for CH3OH(l)
Consider a glass of 218 mL of water at 30°C. Calculate the mass of ice at -15°C that must be added to cool the water to 10°C after thermal equilibrium is achieved. To find the mass of wa
The membrane that surrounds a certain type of living cell has a surface area of 5.00 10-9 m2 and a thickness of 1 10-8 m. how much charge resides on the outer surface
Suppose it is found that the actual molecular mass of your unknown solid is exactly two times larger than that which you determined experimentally. What could you conclude about the nature of your u
ocean waves with wavelength 1.2 m and period 1.5s are moving past a pier. a boy runs along the pier, how many wave crests pass the boy each second
calculate the partial pressure of each gas in atm. PN2 PO2 PAr PCO2 Calculate the concentration of each gas in moles per liter at 0 degrees C cN2 cO2 cAr cCO2 (enter answer in scientific notation fo
A female orb spider has a mass of 0.50g . She is suspended from a tree branch by a 1.1m length of 0.0020mm--diameter silk. how long does it take to reach the spider
an object can be hung from a string with a linear mass density of 0.00200 kg/m that passes over a light pulley. What is the frequency of the vibrator
Describe the preparation of 1 liter of a 0.75M acetate buffer, pH 4.50, starting from a 1.50 M solution of acetic acid and solid KOH pellets, M.W.=56 (pKa=4.75)
A certain airplane has a speed of 250.0 km/h and is diving at an angle of 30.0° below the horizontal when the pilot releases a radar decoy. How high was the plane when the decoy was released
A water filled pipe has water flowing at 5.70 m/s in a section of pipe where the diameter is 19.2 cm, What is the volume flow rate through the smaller pipe
You identified your unknown compound. How you could use this compound to determine the Kf value for ethyl alcohol? Explain what you would do experimentally.