physics worksheet ii

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addis ababa university department of physics phys 1011 worksheet ii conceptual questions 1. an ideal gas expands while the pressure is kept constant. during this process, does heat flow into the gas or out of the gas? justify your answer. 2. what should you do to the length of the string of a simple pendulum to (a) double its frequency; (b) double its period; (c) double its angular frequency? 3. a proton is placed in a uniform electric field and then released. then an electron is placed at this same point and released. do these two particles experience the same force? the same acceleration? do they move in the same direction when released? 4. two protons are released from rest when they are 0.750 nm apart. (a) what is the maximum speed they will reach? when does this speed occur? (b) what is the maximum acceleration they will achieve? when …

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e of side 1.0 m. 4. a bomb explodes into three pieces a, b, and c of equal mass. piece a flies with a speed of 40.0 m/s, and piece b with a speed of 30.0 m/s at an angle of 90° relative to the direction of a as shown in the figure. determine the speed of piece c and the direction of its velocity relative to the direction of piece a. 5. a bullet of mass m is fired into a ballistic pendulum and embeds itself in the wooden bob of mass m (see the figure). after the collision, the pendulum reaches a maximum height h above its original position. (a). show that the kinetic energy of the system decreases by the factor m/(m+m) immediately after the collision. (b). what is the change in momentum of the bullet-bob system due to the collision? 6. one thermometer is calibrated in …

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hat is the maximum temperature increase that the water could have as a result of this event? 12. the internal energy of a gas is 500 j. the gas is compressed adiabatically, and its volume decreases by 100 cm3. if the pressure applied on the gas during compression is 3.00atm, what is the internal energy of the gas after the adiabatic compression? 13. how much heat is required to convert 12.0 g of ice at -10.0oc to steam at 120.0oc. 14. an insulated beaker with negligible mass contains 0.250 kg of water at a temperature of 75.0oc. how many kilograms of ice at a temperature of -20.0oc must be dropped into the water to make the final temperature of the system at 40.0oc? 15. during an isothermal compression of an ideal gas, 335 j of heat must be removed from the gas to maintain constant temperature. how much work is …

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end of a spring. how far (in terms of a) is this mass from the equilibrium position of the spring when the elastic potential energy equals the kinetic energy? 21. two small plastic spheres are given positive electrical charges. when they are 15.0 cm apart, the repulsive force between them has magnitude 0.220 n. what is the charge on each sphere (a) if the two charges are equal and (b) if one sphere has four times the charge of the other? 22. two point charges are placed on the -axis as follows: charge is located at , and charge is at. what are the magnitude and direction of the total force exerted by these two charges on a negative point charge that is placed at the origin? 23. four point charges are placed at each corner of a square with side length a. the charges all have the same magnitude …

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much work is done by the electric force on ? 27. a charge ofis placed in a uniform electric field that is directed vertically upward and has a magnitude of. what work is done by the electric force when the charge moves (a) to the right; (b) upward; (c) at an angle of downward from the horizontal? 28. a silver wire 2.6 mm in diameter transfers a charge of 420 c in 80 min. silver contains free electrons per cubic meter. (a) what is the current in the wire? (b) what is the magnitude of the drift velocity of the electrons in the wire? 29. when switch s in the diagram is open, the voltmeter v of the battery reads 3.08 v. when the switch is closed, the voltmeter reading drops to 2.97 v, and the ammeter a reads 1.65 a. find the emf, the internal resistance of the battery, …

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addis ababa university department of physics phys 1011 worksheet ii conceptual questions 1. an ideal gas expands while the pressure is kept constant. during this process, does heat flow into the gas or out of the gas? justify your answer. 2. what should you do to the length of the string of a simple pendulum to (a) double its frequency; (b) double its period; (c) double its angular frequency? 3. a proton is placed in a uniform electric field and then released. then an electron is placed at this same point and released. do these two particles experience the same force? the same acceleration? do they move in the same direction when released? 4. two protons are released from rest …

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