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Two ice-skaters, whose masses are 45 kg and 75 kg, holdhands and rotate about a vertical axis that passes between them,making one revolution in 2 s. Theircenters of mass are separated by 1.7 m, and their center of mass isstationary. Model each skater as a point particle.
(a) Find the angular momentum of the system about their center of mass.
(b) Find the totalkinetic energy of the system.
An object of mass m = 3.1 g and charge q = +48 μc is attached to a string and placed in a uniform electric field that is inclined at an angle of 30 degrees with the horizontal. The object is in static equilibrium when the string is horizontal.
a singly charged 7li ion has a mass of 1.16 10-26 kg. it is accelerated through a potential difference of 504 v and
A 0.10-kg object with a velocity of 0.20 m/s in the +x direction makes a head-on elastic collision with a 0.15 kg object initially at rest
A ray of light makes an angle of 25 degrees with the normal to a plane mirror. through what angle is the reflected ray rotated
the light shining on a diffraction grating has a wavelength of 490 nm in vacuum. the grating produces a second-order
An aluminum rod is 18.0 cm long at 20°C and has a mass of 350 g. If 12500 J of energy is added to the rod by heat, what is the change in length of the rod
Two point charges are on the y-axis. A 4.50 μC charge is located at y=1.25cm, and a -2.24μC charge is located at y=1.80 cm. Find the total electric potential at (a) the origin and (b) the point having coordinates (1.50cm, 0).
A woman rides on a Ferris wheel of radius 16 \rm m that maintains the same speed throughout its motion. What is her mass in kilograms
A horizontal circular platform rotates counterclockwise about its axis at the rate of 0.875 rad/s. You, with a mass of 69.5 kg, Calculate the total angular momentum of the system
Two sound waves have intensities of 0.100Wm^2 and 5.00W/^2. What is the difference in their intensity levels
An inductor has an inductance of 0.015 H. The voltage across this inductor is 49 V, What is the current in the inductor
deepas uncle was surprised to see the fast changes in the world. he is not so educated. he asked deepa to tell him the
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