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Physicists define the center of mass of two objects (#1 and #2) with masses m1 and m2 at locations x1 and x2 to be xCoM = m1x1 + m2x2 m1 + m2 The velocity of the center of mass is the derivitive with respect to time of the xCoM. Take the derivative of equation (1) with respect to time and write the result in the box below labeled Eq. (2). Hints: x1 and x2 are functions of time. Also vCoM = dxCoM /dt with v1 = dx1/dt and v2 =dx2/dt.
In order to measure the radial velocity of a star (the speed of motion towards or away from us) what type of instrument would be used and how would the data be used to derive the velocity?
A plane accelerates from rest at a constant rate of 5.00 along a runway that is 1800 long. What is the time needed to take off
While snorkeling you hear a dolphin's sound as it approaches at 5.00 m/s. what is the actual frequency being emitted
What is the tangential velocity of a satellite in a circular orbit 300km above the surface of the Earth, How long does the satellite take to complete one orbit
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 .
The stoplight had just changed and a 1800 kg. Cadillac had entered the intersection, heading north at 2.4 m/s , How fast was the Volkswagen going just before the impact
q1. consider a 3.0kg ball and a 5.4kg ball in free fall.what is the net force performing on each?what is the
Two protons are placed at a = 4.69 cm above and below the x axis at x = 0 as shown in the figure. An electron is placed along the x axis a distance b = 10.1 cm from the origin. find the magnitude of the electrostatic force on the electron
Two 4.0-g spheres are suspended by 9.0-cm-long light strings. determine the electric field intensity that enables the spheres to be in equilibrium at ? = 12°
In a mass spectrometer the charged particles have to reach a common specific speed. To do so, they are accelerated with an electric field, determine the direction of the magnetic force
77 N to push a box with an acceleration of 0.55 m/s2. When she increases the pushing force to 85 N, the box's acceleration changes to 0.72 m/s2. What is the mass of the box
A sign (mass 1700kg ) hangs from the end of a vertical steel girder with a cross-sectional area of 0.013m^2, What is the stress within the girder
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