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A father racing his son has three-fifths the kinetic energy of the son, who has half the mass of the father. The father speeds up by 1.0 m/s and then has the same kinetic energy as the son.
(a) What is the original speed of the father?
m/s
(b) What is the original speed of the son?
What is the kinetic energy of an ideal projectile of mass 15.3 kg at an apex (highest point) of its trajectory, if it was launched with an initial speed of 42.5 m/s and an initial angle of 41.5° respecting the horizontal.
A source emits sound uniformly in all directions. A radial line is drawn from this source. On this line, determine the radial positions of two points, 0.786m apart, such that intensity level at one point is 1.72 dB greater than that at the other.
What is the most amounts by which the wavelength of an incident photon could change when it undergoes Compton scattering from an atom or molecule with a 19 u mass .
A train at rest emits a sound at a frequency of 1045 Hz. An observer in a car travels away from the sound source at a speed of 37 m/s. What is the frequency heard by the observer .
A meter stick is found to balance at the 49.7cm mark when placed on the fulcrum. When a 41g mass is attached at the 23cm mark, what is the mass of the meter stick
The first telescope is 0.3m and has a focal ratio of f/8. The second telescope has a focal ratio of f/4 and is 30m in diameter. They each have an identical CCD camera whose pixels are 25 microns on a side.
A pencil is held perpendicular to the optical axis of a concave spherical mirror. The pencil is 85 cm from the center of the mirror, What is the magnification of the pencil's image
Unpolarized light of initial intensity 26W/m^2 is passed through three polarizing filters polarizing filters. compute the intensity of the light after passing through all three polarizing filters
A hotel elevator ascends 140 m with a maximum speed of 5.80 m/s. Its acceleration and deceleration both have a magnitude of 1.50 m/s2.
An electron confined in a one-dimensional box is observed, at different times, to have energies of 20 , 45 , and 80. What is the length of the box
In a plane radio wave the maximum value of the electric field component is 5.17 V/m. Calculate the maximum value of the magnetic field component
LASIK eye surgery uses pulses of laser light to shave off tissue from the cornea, reshaping it. What is the power of one laser pulse
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