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A roller coaster is initially at a height of 40 m above the ground and has an initial velocity of 15 m/s. Using conservation of energy, find the velocity of the roller coaster at a height of 5 m above the ground. Sketch the problem before you solve it.
A particle undergoes uniform circular motion of radius 19.1 ?m in a uniform magnetic field. What is the kinetic energy of the particle
An airplane, diving at an angle of 53° with the vertical, releases a projectile at an altitude of 730 m. How far did the projectile travel horizontally during its flight
In an engine, a piston oscillates with simple harmonic motion so that its position varies according to the expression, x = 8.00 cos 3t + ? 4 where x is in centimeters and t is in seconds. (a) At t = 0, find the position of the piston.
Some bacteria are propelled by biological motors that spin hair-like flagella. How long does it take the motor to make one revolution
At rest, a car's horn sounds at a frequency of 410 Hz. The horn is sounded while the car is moving down the street. What is the speed of the car
a 30-cm tall (height) ad 4.0 in diameter plastic tube has a sealed bottom. The mass of the tube if 30.0g. What is the density of the liquid
A container of volume 0.52 m3 contains 3.1 mol of argon gas at 30°C. Assuming that argon behaves as an idealgas, find the total internal energy of this gas
The pilot of an aircraft wishes to fly due west in a 30.50 km/h wind blowing toward the south. The speed of the aircraft in the absence of a wind is 190km/h. What should its speed relative to the ground be.
Cliff and Will support the board at each end so that it is horizontal. A 52 kg boulder is placed on a 2.00 m long board at a point that is x = 1.45 m from Cliff. What force does Will apply to the board
If the torque required to loosen a nut on the wheel of a car has a magnitude of 33.1 N · m, what minimum force must be exerted by a mechanic
Two blocks (A and B) are in contact on a horizontal frictionless surface. A 40N constant horizontal force is applied to A. The mass of A is 5.0kg and the mass of B is 20kg
Two point charges of equal magnitude are 7.3cm apart. At the midpoint of the line connecting them, their combined electric field has a magnitude of 40N/C . Find the magnitude of the charges.
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