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Julie drives 100 mi to Grandmother's house. On the way to Grandmother's, Julie drives half the distance at 43.0 and half the distance at 74.0 . On her return trip, she drives half the time at 43.0 and half the time at 74.0 . What is Julie's average speed on the way to Grandmother's house? What is her average speed on the return trip?
A cargo plane is flying horizontally at an altitude of 20.0 km with a speed of 888 km/h when a large crate falls out of the rear loading ramp. How long does it take the crate to hit the ground
Compute the average acceleration of car and lizard and the final velocity of a Ferrari.
As an auto mechanic, you need to determine the EMF and internal resistance of an old battery. What are the battery\'s EMF and internal resistance
A hollow plastic sphere is held below the surface of a freshwater lake by a cord anchored to the bottom of the lake. When the sphere comes to rest, what fraction of its volume will be submerged
You are pushing a 150-kg wooden crate in a straight line a distance of 4.5 m across a wooden floor. What is the work done by friction on the crate
Two bricks are adjacent, and a third brick is positioned symetrically above them. Where is the center of mass of the three bricks
a composite slab with dimensions d1 = 10.8 cm, d2 = 3.00 cm, and d3 = 14.0 cm. What are the coordinates of the center of mass of the slab
A 2.10 kg mass attached to a spring oscillates with a period of 0.375 s and an amplitude of 20.5 cm. Find the total mechanical energy of the system
Two particles rest at a distance d apart on the edge of a table. One of the particles of mass m, falls off the edge and falls vertically. Using the other particle (still at rest) as the origin, (a) calculate the torque ? on m as a function of time..
A 3.0 m organ pipe is open at both ends and contains air. The velocity of sound in air is 331 m/s. What is the wavelength of the lowest frequency mode in m
A flywheel has a constant angular deceleration of 2.2 rad/s2. Find the time for the flywheel to come to rest
estimate the % difference, which the use of isothermal compressibility instead of the adiabatic compressibility, would make to the calculated value of the speed of sound (340m/s)
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