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a spring is first stretched 20 cm from its unstressed length it is then stretched an extra 18 cm how does the work
a 60 kilogram ball is tied to the end of a 50 centimeter long string and swung in a vertical circle the center of the
the focal length of a magnifying glass is 45 cm1 to magnify an object do you place it at 30 cm or at 50from the glass2
a van at the indianapolis 500 mile race accelerates uniformly from the pit area going from rest to 350 kmh in a
the vector a has a magnitude of 5mph and points along the x-axis vector b has a magnitude of 8mph and makes an angle of
a 500 gram model rocket is resting horizontally at the top edge of a 40 meter high wall when it is accidentally bumped
two piers c and d are placed on a river 1610 meter apart two people must make round trips from pier c to pier d and
a bicyclist finds that when he is moving at 10 ms along a south bound bicycle trail that a small piece of paper carried
the antenna on a cordless phone radiates microwaves at a frequency of 70 ghz what is the maximum length of the antenna
a 7 meter long wire is strung less or more horizontally in an east-west direction and a current of13 amp is sent from
assuming your skin temperature is 372degc and the temperature of your surroundings is 207degc decide the length of time
compton used photons of wavelength 00711 nanometera find the energy of these photonsb find the wavelength of the
a constant 370 amp current moves along a straight wire that is perpendicular to a 220 t magnetic field if the wire is
two identical objects are placed in a room at 27degc object 1 has a temperature of 83degc and object 2 has a
the double star system yasmin is observing is 42 1016 m from earth and the two stars are separated from each other
a typical household uses 500 kwh kilo-watt-hours note the kwh works out to be units of energy if you think about it of
a spring has a force constant k18nm if its compressed 50 centimeter from its original equilibrium length determine how
two identical wires are horizontal and run parallel to each other they each carry the similar current i the top wire is
a capacitor is discharged through a 100 ohm resistor the discharge current decreases to 23 percent of its initial value
an object acted on by three forces moves with fix velocity one force acting on the object is in the positive x
unpolarized light passes during two polarizers in turn with polarization axes at 58deg to each other what is the
a 270 kilogram block is connected to an empty 100 kilogram bucket by a cord running over a frictionless pulley the
two point charges are placed on the x-axis the first chargeq1 800 nc is placed a distance 160 m from the origin along
consider material with a frequency dependent refractive index nnomega calculate the group velocity in this
the green line of gaseous mercury at 546 rm nm falls on a double-slit apparatus if the fifth dark fringe is at 0145circ