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In Rutherford's famous scattering experiments that led to the planetary model of the atom, alpha particles (having charges of +2e and masses of 6.64 10^-27 kg) were fired toward a gold nucleus with
A 2.1- Ping-Pong ball is rubbed with a piece of wool, resulting in a net positive charge of 7.8 on the ball. How many electrons were transferred from the ball to the wool in this process?
A 25.0 mL aliquot of 0.211 M citric acidsolution is titrated with 0.143 M sodiumhydroxide solution. If the balanced titration reaction equationis:
During a 5.45 s interval, a particle's coordinates change from x = 10.4 m, y = 4.95 m to x = 28.8 m, y = -4.95 m. Assuming the particle's velocity is constant, what will its coordinates be at the en
Consider the cis trans isomers of 1,3-di-tert-butylcyclohexane. What unusual feature accounts for the fact that one of these isomers apparently exists in a twist-boat conformation rather than a chai
A 100 kg truck moving at 10 m/s runs into a concrete wall. it takes 1.0 sec for the truck to completely stop. What is the magnitude of force exerted on the truck during the collison?
Dinitrogen pentoxide undergoes first order decomposition inchloro form solvent to yield nitrogen dioxide and oxygen gas. Therate constant at 45 degrees Celsius is 6.2*10-4/min.
A rotating fan completes 1150 revolutions every minute. Consider the tip of a blade, at a radius of 18.0 cm. (a) Through what distance does the tip move in one revolution? What are (b) the tip's spe
Find the equivalent capacitance of a 3.90 µF capacitor and an 10.50 µF capacitor when they are connected as follows.
When 1 of a fuel is burned at constant pressure, it produces 3450 of heat and does does 11 ofwork.What is the value of delta e and h for the combustion of the fuel?
A high-voltage transmission line with a resistance of 0.31 /km carries a current of 950 A. The line is at a potential of 710 kV at the power station and carries the current to a city located 164 km
If electrical energy costs 12 cents, or $0.12, per kilowatt-hour, then what would the following events cost? (a) burning a 120 W light bulb for 24 h straight
A compound having an approximate molar mass of 120-15 g has the following percent composition bymass: carbon, 38.44%; hydrogen, 4.839%;chlorine, 56.73%.
A wire 3.00 m long and 0.450 mm2 in cross-sectional area has a resistance of 38 at 20°C. If its resistance increases to 38.3 at 28.0°C, what is the temperature coefficient of resistivity?
A person notices a mild shock if the current along a path through the thumb and index finger exceeds 80 µA. Compare the maximum possible voltage without shock across the thumb and index finger
A proton beam in an accelerator carries a current of 115 µA. If the beam is incident on a target, how many protons strike the target in a period of 22.0 s?
You throw a superball so that it bounces off the floor, then off the underside of a table, then off the floor again. What must the initial relation between Vx and Rw be so that the ball returns to y
A 15N block is now immersed in a salt water (density = 1030 kg/m3). Determine the buoyant force acting on the block if the spring scale reads 11.5 N.
Find the rms speed and the average kinetic energy of a hydrogen atom at a temperature of 5.9 multiplied by 107 K. (At this temperature, which is of the order of the temperature in the interior of a
Assume that the upward flight is an exact reverse of the fall. The time spent below the bottom of the window is 2.02 s. How tall is the building?
Calculate the force exerted by each pier, F1 and F2, of a 5.0 m footbridge with a mass of 100 kg, evenly distributed, when a 55 kg person stands 2.0 m from one end of the bridge.
Estimate how long the Sun would have to shine on the Earth to supply enough energy to melt all the polar ice-caps, assuming that no energy escapes the Earth.
A 6.0-cm-diameter horizontal pipe gradually narrows to 4.0cm. When water flows through this pipe at a certain rate, thegauge pressure in these two sections is 32.0kPa and 24.0 kPa,respectively. Wha
A mixture containing only AgCl and AgBr weighs 2.00 g. It isquantitatively reduced to silver metal, which weighs 1.30 g.Calculate the weight of AgCl and AgBr in the original mixture.
A car travels up a hill at a constant speed of 55 km/h and returns down the hill at a constant speed of 22 km/h. Calculate the average speed for the round trip.