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a river narrows at rapids from a width of 15 meter to a width of only 6 meter the depth of the river before the rapids
a 79 kg runner exerts 340 n of horizontal force as he pushes off the ground the vertical ground reaction force at this
a hot-air balloon has a volume of 2600m3 the balloon fabric the envelope weighs 810 newton the basket with gear and
a cheerleader does a handstand on other cheerleaderrsquos hands if the lower cheerleader weighs 180 lbs and the
two speakers each with a power output of 0510 watt are mounted facing each other and 338 meter apart if the speakers
a 163 kilograms block rests on a horizontal table and is attached to one end of a mass less horizontal spring by
two point charges are fixed in space along the x-axis the first charge of 38 c is located at x - 45 cm while the
each of the protons in a particle beam has a kinetic energy of 305 x 10-15 joule find what are the magnitude and
the coefficient of static friction among richards hand and his tennis racket is 051 how hard must he squeeze if he
the flow rate of blood through a 21 x 10-6 meter radius capillary is 353 x 10-9 cm3s compute what is the speed of blood
write down all the physical principles about resistances and currents in simple circuits containing resistors also
a clever physics professor designs a cat-cannon and uses it to launch a 5 kilogram cat horizontally off the top of the
draw a labelled diagram of two resistors in parallel which are then connected in series by a third resistor compute the
a water wave oscillates up and down once every 150 s the distance between wave crests is 185 meter compute what speed
a the dielectric strength of air e 3 x 106 vm is the maximum field that air can withstand before it breaks down and
location a is 275 m to the right of a point charge q location b lies on the same line and is 435 m to the right of the
an immersion heater must increase the temperature of 150 kilogram of water from 10oc to 15oc in 10 minute while
if 245 x 10-4 joule of work are required to move 292 c of charge from one point to another obtain the electric
a charge of q 707 icircfrac14c is placed in an electric field the x and y components of the electric field are ex
two long parallel wires carry currents of 357 amp and 477 amp the magnitude of the force per unit length acting on each
a mass of 025 kilogram hanging from a spring with a spring constant of 25 nm is set into an up-and-down simple harmonic
the nucleus of 8be which consists of 4 neutrons and 4 protons is very unstable and spontaneously breaks into two alpha
a 540 nc point charge is on the x axis at x 125 meter a second point charge q is on the x axis at -0625 metera find
the speed of an alpha particle is determined to be 255e6 ms if all of its kinetic energy is acquired by passing through
a 71 nc charge is placed 17 meter from a 43 nc charge obtain the magnitude of the electrostatic force that one charge