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salt water has a greater density than freshwater a boat floats in both freshwater and saltwater the buoyant force on
a soccer ball with mass 0242 kg is initially at rest and is kicked at an angle of 290deg with respect to the horizontal
the magnetic force exerted on a 13 -m segment of straight wire is 16 n the wire carries a current of 31 a in a region
a us 20 gold piece has a mass of 3344g and displaces 1935cm3 of water if the coin is known to consist of only gold
a cylinder contains a mixture of helium ans argon gas inequlibrium at a temperature of 150 degreesa what is the average
in the high jump the kinetic energy of an athlete is transformed into gravitational potential energy without the aid of
a helicopter is using a steel cable to lift a 2200 kg jeep the unstretched length of the cable is 12m and its radius is
an 193kg box is released on a 361o incline and accelerates down the incline at 0276ms2 what is the magnitude of the
a sound wave from a siren has an intensity of 1089 wm2 at a certain point and a second sound wave from a nearby
a block oscillating on a spring has period t 20sa what is the period if the blocks mass is doubledexplainb what is the
an object is undergoing simple harmonic motion with a maximum speed of 693 ms and the maximum acceleration of 52 ms2
suppose a 175-kg motorcycle has two wheels and is heading toward a hill at a speed of 300 ms assume the wheels to be
a 350g bullet moving at 475 ms strikes a 25kg bag of flourthat is on ice at rest the bullet passes through the bag
at a distance of 70 km from a radio transmitter the amplitude of the radiated electric field of the radio transmissions
two identical resistors are connected in parallel across a 23vbattery which supplies them with a total power of 87w
a police radar has an effective range of 15km while a motorists radar detector has a range of 20kmnbsp the motorist is
the electric potential energy stored in the capacitor of adefibrillator is 65 j and the capacitanceis 137 microf what
a resistor and an inductor are connected in series across an ac voltage source oscillating at 60 hz the rms voltage
a car slows down with an acceleration that has a magnitude of32 ms2 while doing so it travels 120 m in the xdirection
a diver springsupward from a board that is three meters above water at an instanthe contacts the water his speed is 920
a particular cylindrical bucket has a height of 360 cm and the radius of its circular cross-section is 15 cm the bucket
450 g of water at 10degc is in a pot on the stove a block of ice with mass 225 g that is originally at -10degc is
a 350 g air track cart on a horizontal air trackno friction is attached to a string that goes over a pulley with a
a marble is thrown horizontally with a speed of 16 ms from the top of a building when it strikes theground the marble