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Two newly discovered planets follow circular orbits around a star in a distant part of the galaxy. The orbital speeds of the planets are decided to be 47.4 km/s and 64.3 km/s. The slower planet's orbital period is 6.37 years. (a) What is the mass of the star? (b) What is the orbital period of the faster planet, in years?
A 4.29 g bullet moving at 686.5 m/s penetrates a tree trunk to a depth of 4.49 cm. Assuming that the frictional force is constant, determine how much time elapses between the moment the bullet enters the tree and the moment the bullet stops moving. a..
A gymnast of mass 60kg hangs from a vertical rope attached to the ceiling. You can ignore the weight of the rope and assume that the rope does not stretch. Use the value 9.81 for the acceleration of gravity.
In an integrated circuit, the current density in a 3.0??m?thick× 80 ??m?wide gold film is 7.9×105A/m2. How much charge flows through the film in 15 min
Two geological field teams are working in a remote area. A globalpositioning system (GPS) tracker at their base camp shos the location of the first team as 36km away, 13degree north of west,and the second team as 22km away, 37degree east of north.
What is the final velocity of a hoop that rolls without slipping down a 6.50 m high hill, starting from rest
An 8.0g bullet is shot into a 5.0kg block, at rest on a frictionless horizontal surface. Find the speed of the bullet
A 9.0-kg box of oranges slides from rest down a frictionless incline from a height of 5.0 m, What is the coefficient of kinetic friction, µk, of the surface from A to B
A 0.30 kg puck, initially at rest on a frictionless horizontalsurface, Find the fraction of kinetic energy lost in the collision
An object 4.0 cm high is placed 12 cm in front of a diverginglens that has a focal length of – 8.0 cm. Describe by calculation the location, nature (real or virtual andupright or inverted), and size of the image for this location.
A simple camera telephoto lens consists of two individual lenses. The objective has a focal length f1 = + 37.0 cm. What is the magnification of the lens combination
An electron with speed v0 =4.16×106m/s is traveling parallel to and along the same direction as an electric field of magnitude E = 7.90×103N/C, How far will the electron travel before it stops
astronauts use a centrifuge to simulate the acceleration of a rocket launch. the centrifuge takes 40.0s to speed up
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