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A 45.0 kilogram girls is standing on a 150 kilogram plank. The plank is at rest and is on no friction lake surface. She walks at constant 1.5 m/s to the right on the plank. Determine her velocity relative to the surface of the ice. Determine velocity of the plank relative to the surface of the ice?
question a beam of light in air is incident on the surface of a slab of fused quartz. part of the beam is transmitted
a spherical ballon with radius 1.0m consists of an aluminum coated mylar. how many electrons must be deposited on the
One end of a brass bar is maintained at 296°C, while the other end is kept at a constant however lower temperature. The cross-sectional area of the bar is4.00 10-4 m2. Because of insulation, there is negligible heat loss during the sides of the bar.
Periodic signals from three pulsars reach the Earth. Signals from the first pulsar, denoted A, have a frequency of 400 Hz and come from a direction 10 degrees away from the direction of the galactic center.
A charge of -2.2×10-9 C is at the origin and a charge of 6×10-9 C is on the x-axis at x = 3m. At what two locations on x-axis (xpositive, xnegative) is the potential zero.
N identical resistors are connected in series. The resistance of one of them is equal to R. What is the equivalent resistance of all resistors
The Van der Waals constants for carbon monoxide are a=1.4541 dm^6 mol^-1. Using the hybrid hard-sphere/r^-6 potential, estimate values for the hard-sphere molecular radius \(\sigma/2\) and the \(c_{6}\) value characterizing the attractive tail of ..
What is the fundamental minimum uncertainty in a dimension of the position of the electron in the previous problem if its momentum is simultaneously deliberate to a precision of plus or minus one percent (two percent total)?
Each plate of a parallel-plate air-filled capacitor has an area of 0.0020 m2, What is the surface charge density on the plates
Biological muscle cells can be thought of as nanomotors that use the chemical energy of ATP to produce mechanical work. How much work is done by such proteins
A drag racer, starting from rest, speeds up for 402 m with an acceleration of +21.0 m/s2. A parachute then opens, slowing the car down with an acceleration of -5.75 m/s2. How fast is the racer moving 2.90 102 m after the parachute opens?
A mass of .75 kg oscillates on a light spring, and another .75kg oscillates as the bob of a simple penulum in SHM. If the pendulum length is .3m, what whould be the spring constant of the spring if the periods of oscillation are equal?
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