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A spaceship travels at a constant speed from earth to a planet orbiting another star. When the spacecraft arrives, thirteen years have elapsed on earth, and 6.5 years have elapsed on board the ship. How far away (in meters) is the planet, according to observers on earth?
A hockey stick is swung with the average angular acceleration of 1.5 rad/s2. What is the angular velocity of the stick as it strikes the ball at the end of 0.8 second swing.
for small stretches the achilles tendon can be modeled as an ideal spring. experiments using a particular tendon showed
he 5.0- block is pulled to the right with a force as shown in the figure . The coefficient of static friction between all surfaces is 0.55 and the kinetic coefficient is 0.3, illustrate what is the minimum value of needed to move the two blocks?
Object A, which has been charged to + 16nC , is at the origin. Object B, which has been charged to ? 20nC , is at (x,y)=(0.0cm,2.0cm). What is the magnitude of the electric force on object A
The first active volcano observed outside the Earth was discovered in 1979 on Io, one of the moons of Jupiter. Assume a volcano on another moon is observed to be ejecting material to a height of about 2.19 x10^5 m.
A sound wave generated by a source of frequency 440 Hz is moving through 25 oC air. What is the wavelength of the sound wave inside the steel
A rod 20 cm long moves in a plane perpendicular to a magnetic field of 0.065 T. The velocity of the rod is perpendicular to its length. Find the speed of the rod if the potential difference between the ends is 6.9 V. ____________ m/s
An airplane needs to reach a velocity of 407 km/h to take off. On a 2000m runway, what is the least acceleration necessary for the plane to take flight.
An airplane flies 200 km due west from city A to city B and then 315 km in the direction of 33.0° north of west from city B to city C.
two large parallel conducting plates are 21 cm apart and have charges of equal magnitude and opposite sign on their
A spaceship travels with a speed of 0.3 c as it passes by the Earth on its way to a distant star, Determine its length as measured by a person on Earth
q1. a submarine is 306 m horizontally out from a shore and 120 m beneath the surface of the water. a laser beam is sent
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