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A girl is skipping stones across a lake. One of the stonesaccidentally ricochets off a toy boat that is initially at rest inthe water (see the drawing). The 0.072-kg stone strikes the boat ata velocity of 13 m/s, 15° below due east, and ricochets off ata velocity of 11 m/s, 12° above due east. After being struck bythe stone, the boat's velocity is 2.1 m/s, due east. What is the mass of the boat? Assume the water offers no resistance to theboat's motion.
Your 2.20 kg physics book rests on a horizontal tabletop. Find the normal force on the book. Suppose you pull up on the book with a 15.0 N force
An air conditioning unit keeps a house cool at 68 degrees Fahrenheit when the outsid temperature is 95 degrees Fahrenheit. how much does it exhaust to the outside
a person walks in the following pattern 4.9 km north then 1.5 km west and finally 3.0 km south. a how far in km and b
a solenoid 30.0 cm long and with a cross-sectional area of 0.600 cm2 contains 460 turns of wire and carries a current
A uniform magnetic field B is perpendicular to the plane of rotation. What is the potential difference between the ends of the bar
research and briefly identify the energy conservation measures that reduce a buildings energy use by reducing one or
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 b..
A pendulum bob passes through the lowest part of its path at speed of 2 m/s. What is the tension in the pendulum cable at this point if the pendulum is 80 cm long
a what is the angular momentum of a 3.8 kg uniform cylindrical grinding wheel of radius 16 cm when rotating at 1900
What mass (in grams) of steam at 100°C must be mixed with 251 g of ice at its melting point, in a thermally insulated container, to create liquid water at 66.0°C? The specific heat of water is 4186 J/kg·K. The latent heat of fusion is 333 kJ/kg, an..
a 71 kg baseball lplayer jumps straight up to catch a line drive. If the 140 g ball is moving horizontally at 28 m/s and the catch is made when the ball player is at the highest point of his leap what is his speed immediately after stopping the ba..
A uniform plate of height 1.170 m is cut in the form of a parabolic section. The lower boundary of the plate is defined by: y = 1.600 x2. Find the moment of inertia of the plate about the y-axis
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