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at rush hour the noise from a highway is 104 wm2 with 100 cars passing a given point a minute at night the average
a proton is shot at 5x107 ms toward a gold atom with a mass 197 times t hat of the proton and deflects it straight back
a long rope is suspended from the ceiling waves are started from the bottom traveling up the rope it is observed that
a 1 kg block attached to a spring with force constant 25 nm oscillates on a horizontal frictionless air track at t 0
a simple harmonic oscillator takes 12 s to undergo 5 complete vibrations find a the period of its motion b the
a ball is dropped from a height of 4 m and makes an elastic collision with the ground assume that no mechanical energy
a simple pendulum has a period of 25 sa what is its period if its length is made four times largerb what is its period
suppose that a binary star system consists of two stars of equal mass they are observed to be separated by 400 million
when the sun evolves to the red giant stage its radius may increase to as high as 100 solar radii using the expression
using the mass-luminosity relationship if a main sequence star has a luminosity of 3000 times the luminosity of the sun
the current density inside a long solid cylindrical wire of radius a is in the direction of the central axis and its
now adapt the ideas of the energy and entropy of mixing to gasses in different cylinder the temperature is fixed there
the wheels of a wagon can be approximated as the combination of a thin outer hoop of radius rh 0474 m and mass 546 kg
a 109-kg horizontal platform is a uniform disk of radius 161 m and can rotate about the vertical axis through its
a uniform thin rod of mass 455 kg pivots about an axis through its center and perpendicular to its length two small
an engine flywheel initially rotates counterclockwise at 539 rotations per second then during 213 seconds its rotation
star formation appears to be promoted by sending shock waves through a dark cloud of the interstellar medium give two
a boxcar of mass 568times104 kg is rolling south at 233 ms when it collides with and couples to another boxcar of mass
the mass m 357 kg is sliding on the frictionless incline of angle 427 degrees a force f 324 n is applied horizontally
a 82 kg explorer lands on planet a where the gravitational acceleration is 105 ms2 the radius of the planet is 791 x
interstellar reddening of a stars blackbody spectrum can complicate the estimation of a stars temperature by
the mass m equals 102 kg is sliding on a rough horizontal surface as shown a force f 841 n is applied at an angle of
a wheel initially has an angular velocity of 18 rads it has a constant angular acceleration of 20 rads2 and is slowing
calculate the acceleration due to gravity on neptune the radius of neptune is about 221 x 107 m and its mass is 103 x
the hr diagram is a powerful tool to analyze evolution and characteristics of stars the hr diagram is used to plot the