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Suppose that a planet were discoveredbetween the sun and Mercury, with a circular orbit of radius equalto {\frac{2}{3}} of the average orbit radius of Mercury. (Such aplanet was once postulated, in part to explain the precession ofMercury's orbit. It was even given the name Vulcan, although we nowhave no evidence that it actually exists. Mercury's precession hasbeen explained by general relativity.) The orbital period ofMercury is 88.0 days.
What would be the orbital period of such aplanet?
A small object is placed to the left of a convex lens and on its optical axis. The object is 30 cm from the lens, which has a focal length of 20 cm. what will the image position be
If a mass of 1 kg is accelerated 1 m/s2 by a force of 1 N, illustrate what would be the acceleration of 10 kg acted on by a force of 20 N?
The moon's mass is 7.4 x 10^22kg and it orbits 3.8 x 10^8m from the earth. What is the angular momentum of the moon around the earth
A rotating space station has radius 1.31e+3 m, measured from the center of rotation to the outer deck where the crew lives. What should the period of rotation be
In a certain time, light travels 5.11 km in a vacuum. During the same time, light travels only 2.54 km in a liquid. What is the refractive index of the liquid
A 30 kg box is pushed by a horizontal force of 900. N as it slides up a plane inclined at an angle of 30 degrees with the horizontal. The coefficient of friction between box and plane is 0.20. How far-off will the box travel along the plane in 5.0..
A 2 200-kg pile driver is used to drive a steel I-beam into the ground. The pile driver falls 4.20 m before coming into contact with the top of the beam, Find the magnitude upwards
A 2.10-kg block is suspended from a spring with a spring constant of 480.0 N/m. What fraction of the original kinetic energy of the bullet appears as mechanical energy in the system of block-spring-bullet
A large truck collides head-on with a small car. The car is severely damaged as a result of the collision. According to Newton's third law, how do the forces acting between the truck and car compare during the collision?
A bird flies 3.05 km due west and then 3.26 km due north. Another bird flies 1.03 km due west and 1.16 km due north. Determine the angle with respect to the 2nd bird's displacement vector
A rock of mass 42 kg accidentally breaks loose from the edge of a cliff and falls straight down. What is the magnitude of the acceleration of the rock
Suppose that two objects attract each other with a gravitational force of 16 units. If the distance between the two objects is doubled, what is the new force of attraction between the two objects
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