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A 64 kilograms water skier is being pulled by a nylon tow rope that is attached to a boat. The outstretched length of the rope is 11 meter and its cross-sectional area is 2.0 10-5 m2. As the skier moves, a resistive force (due to the water) of magnitude 125 Newton acts on her; this force is directed opposite to her motion. Obtain the change in the length of the rope when the skier has an acceleration whose magnitude is 0.90 m/s2?
Planet-X has a mass of 3.79×1024 kg and a radius of 5640 km. What is the First Cosmic Speed i.e. the speed of a satellite on a low lying circular orbit around this planet, what is the radius of the synchronous orbit of a satellite
q1. sound waves of frequency 502 hz enter a window 1.18 m wide. the window is in the exact center of one wall of a
A device used in radiation therapy for cancer contains 3.10×10-1 g of cobalt 2760Co (59.9333819 u). Determine the activity of the radioactive material
An electron moves with a speed of 8.0 × 106 meter per second along the +x-axis. When the electron passes through the origin, find the magnitude and direction of the magnetic field at a position of (0, 0, 5.00 cm)
How frequently are photoelectrons ejected in the experiment represented with the graph of Figure Ex38.4, in which the interval on the vertical axis is 2µA and each interval on the horizontal axis is 1 V?
Coherent light of frequency 6.40×1014Hz passes through two thin slits and falls on a screen 89.0cmaway. How far apart are the two slits
A thin spherical shell of silver has an inner radius of 7.80 x 10-2 m, Find the change in the interior volume of the shell
An important factor in many biochemical cell processes is the potential difference across a cell membrane. The inside of a cellis at a lower electric potential than the outside, with a potentialdifference of 0.080 V between them.
An empty capacitor is connected to a 15.7-V battery and charged up. The capacitor is then disconnected from the battery,and a slab of dielectric material (κ = 2.3) is insertedbetween the plates. Find the magnitude of the amount by which thepotential ..
A capacitor is charged up so that 500 nC of charge are on each plate. The capacitor is 2 cm x 3 cm, and is .5 cm between each plate. At what angle does it leave the second capacitor
A student stands at the edge of a cliff and throws a stone horizontally over the edge with a speed of 17.0 m/s. With what speed and angle of impact does the stone land
You and your friend throw balloons ?lled with water from the roof of a several story apartment house. You simply drop a balloon from rest. How high is the apartment house
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