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A river flows with a uniform velocity v. A person in a motorboat travels 1.15km upstream, at which time she passes a log floating by. Always with the same throttle setting, the boater continues to travel upstream for another 50.6min and then returns downstream to her starting point, which she reaches just as the same log does. Calculate the velocity of the river.
Mass m1 moving at constant velocity v1 along the x axis collides with mass m2 initially at rest. Determine the final velocities of the two masses if their collision is perfectly inelastic. Derive using any applicable conservation laws
The length of a beam increases by 2.3mm when its temperature is raised from 29.5 C to 75.6 C. What is the length of the beam at the initial temperature
Review Conceptua lExample 8 before solving this problem. Suppose unpolarized light of intensity 251 W/m2 falls on the polarizer in the figure, and the angle inthe drawing is 25.0°. What is the light intensity reaching the photocell?
A capacitor is connected across the terminals of an ac generator that has a frenquency of 460 Hz and supplies a voltage of 24 V. When a second capacitor is connected in parallel with the first one, the current from the generator increases by 0.18 A. ..
The mass of Mars, 6.40e23 kg, is about one-tenth of that of the Earth, and it's radius, 3395km, is about half of the earth. What is the mean density of Mars
you throw a book straight up from s height of 2 meters above the ground with a speed of 15m/s. what is the maximum height above the ground that the book reaches
An electric field of 10.6 N/C directed due north is superposed on an existing electric field of 15.3 N/C directed due east. What is the magnitude of the resultant field
An aluminum rod is clamped one quarter of the way along its length and set into longitudinal vibration by a variable-frequency driving source. obtain the length of the rod
a uniformly charged conducting sphere of 1.22 m radius has asurface charge density of 8.13 X 10^-6 C/m^2. Calculate the electric field at the surface of the sphere
q1. a 5.19 g lead bullet travelling at 252 ms is stopped by a large tree. if half the kinetic energy of the bullet is
a pendulum has a mass of 0.5 kg and starts at a height of 0.3m. if it is released from rest how fast is it going
A bat strikes a 182g ball with a force of 109-N at an angle of 57° above the horizontal. What is the ball's vertical acceleration (positive for upward, negative for downward).
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