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an underwater camera has a lens of focal length 35 millimeter and a maximum aperture of f280 the film it uses has an
a 9-m uniform beam of weight 77 n is supported with two ropes at the ends if a 27-n person sits at 6 m from the left
a car of mass 940 kg is traveling over the top of a hill as shown in the figure below1 if the hill has a radius of
a 1724 gram mass is on a horizontal surface with microk 0400 and is in contact with a mass less spring with a force
a skier of mass m started from rest at the top of a frictionless round hill of radius r as they slide down the side
a digital cell phone emits a 19 ghz electromagnetic wave with total power 060 watt at a cell phone tower 2 kilometer
a celebrity holds a press conference which is televised live a television viewer hears the sound picked up by the
two negative point charges are separated by 13 centimeter and feel a mutual repulsive force of 260 n the charge of one
a light ray is incident on the surface of water n 133 at an angle of 60 degree relative to the normal to the surface
a diver shines light up to the surface of a flat glass-bottomed boat at an angle of 30 degree relative to the normal if
a 45kg ball with a velocity of 44ms in the x-direction collides head-on elastically with a stationary 18kg ball1 what
engine 1 has an efficiency of 019 and requires 6000 joule of input heat to perform a certain amount of work engine 2
light strikes a diamond n 242 immersed in glycerin n 1473 at an angle of 60 degree relative to the normal to the
two wires are parallel and one is directly above the other each has a length of 50 meter and a mass per unit length of
at a county fair two children ram each other head-on while riding on the bumper cars jill and her car traveling left at
three resistors are connected to a 54 v battery r13omega r2601omega r34omega estimate the current through each resistor
in walking across a carpet you acquire a net negative charge of 60 muc find how many excess electrons do you
an electron and a proton are separated by 33 nma evaluate the magnitude of the force on the electronb evaluate the net
1 why should the voltmeter and ammeter be read simultaneously to decide the resistance of a circuit component2 if a
the string on a string bass vibrates at a fundamental frequency of 54 hertz if the strings tension were increased by a
a string is fixed at both ends and is vibrating at 117 hertz which is its third harmonic frequency the linear density
the union won the civil war but did the north succeed or fail to attain a reasonable level of social equality and
a train with a total mass 700e6kg rises 620m as it travels a distance of 910 km along a steady slope at a constant
the sahara desert with a very arid climate is one of the hottest regions in the world its average temperature is above
1 discover the magnitude of the linear momentum of a 1200 kg automobile traveling at 50kmh2 a 24kg mud ball drops from