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a projectile is fired in such a way that its horizontal range is equal to 12 times its maximum height what is the angle
a playground is on the flat roof of a city school 53 m above the street below see figure the vertical wall of the
a flask containins a mixture of heg and neg the total pressure of gas in the flask is 950 torr the mixture is 650 neg
given that an atom of a semiconductor has a diameter of 269 angstroms what is the maximum number of moles that fit in
a student stands at the edge of a cliff and throws a stone horizontally over the edge with a speed of 140 ms the cliff
fertilizer is made by mixing equal masses of potassium nitrate kno3 and ammonium phosphate nh43po4 what is the mass
a parachutist falls 500 m without friction when the parachute opens he slows down at a rate of 35 ms2 if he reaches the
a rock falls off the back bumper of a truck which is traveling at 268 ms the rock hits the ground 0387 seconds after it
the reaction between iron iii oxide and aluminum to produce aluminum oxide and iron has a heat of reaction deltah equal
a man lifts a 27-kg stone vertically with his hand at a constant upward acceleration of 17 ms2 what is the magnitude of
the reaction between sodium metal and chlorine gas produces 822 kj of heat energy for chlorine molecule consumed 2 na s
a light bulb is connected to a 1200-v wall socket the current in the bulb depends on the time t according to the
1 if a mixture of argon and xenon have total pressure of 870 torr and the pressure of the argon is 539 torr what would
a man swimming at 3 ms crosses a river flowing east at 1 ms the river is 300 m wide the man want to reach at point 50 m
the sled 100kg rides on a slope 30 degrees to the horizontal the coefficient of friction is 08 what force parallel to
a standing wave on a string is produced when one end is fixed and the other is driven by a 76 hz oscillator four and
a gas at 550 torr and 12 liters is allowed to expand to 43 l what is the final pressure of the gas in mmhg or
temperatures are often measured with electrical resistance thermometers suppose that the resistance of such a
calculate the capacitance per unit length of an axon of radius 45 microm the membrane acts as an insulator between the
a sytrofoam cup calorimeter is calibrated by adding heat to the water in it with an electrical heater when 1350j of
a parallel plate capacitor of capacitance 49 microf has the space between the plates filled with a slab of glass with
the reaction between nitrogen and oxygen gases requires the absorpotion of 43 kj of energy per mole of nitrogen
1 how many grams of salt would be in 1400 ml of a 105wtvol solution of the salt2 what would be pmm concentration of a
in an experiment on standing waves a mechanical vibrator drives a string both ends of the string are fixed the distance