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A water-skier is being pulled by a tow rope attached to a boat. As the driver pushes the throttle forward, the skier accelerates. A 61.3-kg water-skier has an initial speed of 5.5 m/s. Later, the speed increases to 11.3 m/s. Determine the work done by the net external force acting on the skier.
question1a dolphin located in sea water at a temperature of 21?c emits a sound directed toward the bottom of ocean 148
GPS satellites orbit the Earth at an altitude of 12,500 miles. How long does it take these satellites to make a complete orbit of the Earth?
You drive at 65 mi/h towards the east for 2 hours and then turn towards the north and drive at 56mi/h for 1 hour. find the average speed and average velocity
If the frequency of oscillation of the wave emitted by an FM radio station is 95.8 MHz, determine the wave's period of vibration
A copper wire has a 25-m ohm resistance at 20 degrees C. When the wire is carrying a current, What is the change in the wire's resistance
Consider a spring of stiffness k and mass m. If we stretch - simultaneously - both ends of the spring by force F1 and F2. What will be the elongation of the spring
A 4.0 uF capacitor is initially uncharged and connnected in series with a 4.0 kQ reisitor. How long will it take for the capacitor to reach one fourth of this maximum charge
Determine the angular speed of a speck of dirt located 1.97 cm from the center of a CD rotating inside a CD player at 263 rpm.
Throughout a hard sneeze, your eyes may shut for 0.41 s. If you are driving a car at 98 km/h during such a sneeze, how far does the car move during that time.
A box is sliding with a speed of 4.50 m/s on a horizontal surface when, at point P, it encounters a rough section. What is the coefficient of friction at the stopping point
A thin bi-convex lens with index of refraction n=1.5has radii of curvature for its left and right surfaces of magnitude15 cm and 30cm respectively. Is the image upright or inverted
convert normal blood pressure readings of 120 over 80 mm hg to newtons per meter squared using the relationship for
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