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The roller coaster in the figure below starts with a velocity of16m/s.One of the riders is a small girl of mass 27kg.Find her apparent weight when the roller coaster is at locationsBandC. At these two locations, the track is circular, with the radii of curvature given in the figure. The heights at points A, B, and C are hA=23m, hB=33m, and hC= 0. Assume friction is negligible and ignore the kinetic energy of the wheels.
Waves that are emitted in phase from two sources will undergo constructive interference when the paths from the sources differ by
The centralized model for generating electricity
A panicular spring has a spring constant of 86 N/m and a mass of 0.548 kg at its end. When the spring is driven in a viscous medium, the resonant motion occurs at an angular frequency of 12.2 rad/s.
Think a Michelson interferometer operated by light from a sodium lamp with λNa = 589 nm. Suppose the interferometer is utilized to check the accuracy of a meter stick by moving one of the mirrors a distance of precisely 1.87 m (as determined with the..
An electron ismoving at a speed of 1.2 104 m/sin a circular path of radius of 1.9 cminside a solenoid. Find the strength of the magnetic field inside the solenoid
It is determined by immersing a crown in water that its volumeis 26 in.3 = 0.0015 ft3. What would its weight be if it were made of pure gold
A cylindrical disk has volume 8.98*10 -3 m 3 and mass 7.98 kg. The disk is floating on the surface of some water with its flat surfaces horizontal. The area of all flat surface is 0.636 m2. What is the specific gravity of the disk?
A model airplane of mass 0.790 kg is flying at constant speed in a horizontal circle at one end of a 26.0 m cord and at a height of 11.0 m. What is the acceleration of the plane
A hypodermic needle consists of the plunger of circular cross-section that slides inside a hollow cylindrical syringe. When the plunger is pushed, the contents of syringe are forced through a hollow needle.
An engine has a hot reservoir temperature of 969 K and a cold reservoir temperature of 602 K. The engine operates at two-fifths maximum efficiency. What is the efficiency of the engine?
find the velocity of the plane relative to the ground.
For a science fair competition, a group of High School students built a kicker-machine that can launch a golf ball from the origin with a velocity of 13.1 m/s, Where will the golf ball fall back to the ground
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