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A 2000 lbm automobile is driving down a level road at 70 mph. The engine is disengaged and the automobile is allowed to coast. After 7 seconds, the speed of the automobile is 60 mph. Use this information to estimate the power required for this automobile to travel at 65 mph on this road.
A 1.00-kg glider attached to a spring with a force constant of 25.0 N/m oscillates on a horizontal, frictionless air track. At t = 0 the glider is released from rest at x = -3.00 cm.
A Molecule of DNA is 2.17 um long. The ends of the molecule become strongly ionized: negative on one end, positive on the other. The helical molecule acts like a spring and compresses 0.78% upon becoming charged. Determine the effective spring con..
the football has a mass of .40kg and the quarterback that threw the ball accelerated it from rest to 25 m/s in a distance of .60m. what force did the player's hand exert on the ball
A 65-g ice cube at 0°C is placed in 874 g of water at 23°C. What is the final temperature of the mixture
A bicyclist makes a trip that consists of three parts, each in the same direction (due north) along a straight road. What is the average speed of the bicyclist for the trip
The coefficient of kinetic friction between the lighter block and the plane is 0.10 the lighter block leads, find the tension in the taut string
about 0.1 ev is required to break a hydrogen bond in a protein molecule. calculate the minimum frequency and maximum
Far in space, where gravity is negligible, a 480-kg rocket travelling at 95 m/s fires its engines. The figure shows the thrust force as a function of time. The mass lost by the rocket all through these 30s is negligible.
A rotating wheel requires 2.99-s to rotate through 37.0 revolutions. What is the constant angular acceleration of the wheel
A solid sphere of mass 6.0 kg is mounted on a vertical axis and can rotate freely without friction, What is the speed of the block after it has fallen 80 cm
Heat flows into an ideal gas at a constant volume. The pressure increases from 1.5 atm to 5.5 atm. What is the total heat flow of the process
Two sound sources radiating in phase at a frequency of 560 Hz interfere such that maxima are heard at angles of 0 and 25° from a line perpendicular to that joining the two sources. Find out the separation between the two sources. (Wave velocity of..
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