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Suppose 5.00 g of hydrogen is separated into electrons and protons. Suppose also the protons are placed at the earth's North Pole and the electrons are placed at the South Pole. What is the resulti
Gulls are often observed dropping clams and other shellfish from a height to the rocks below, as a means of opening the shell. If a seagull drops a shell from rest at a height of 14 m, how fast is t
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?
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
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?
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.
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 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 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.
A particle beam is made up of many protons each with a kinetic energy of 3.25×10-15J. A proton has a mass of 1.673×10-27kg and a charge of +1.602×10-19C. What is the magnitude of a u
A rocketship of proper length d travels at constant velocity v relative to a frame S. The nose of the ship (A') passes the point A in S at t = t' = 0, and at this instant a light signal is sent out
(a) at what horizontal distance from the beetle should the archerfish fire if it is to hit its target in the least time? (b) How much time will the beetle have to react?
What are (a) the speed and (b) the direction of motion as a pararescuer enters the water following a ten and ten jump?