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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 determined to be 42.1 km/s and 58.3 km/s. The slower planet's orbital period is 6.86 years. (a) What is the mass of the star? (b) What is the orbital period of the faster planet, in years?
suppose there is significant air resistance in addition to the spring force acting on the mass as it oscillates up and down. how will the elastic potential energy change
You are driving a car that weighs 1500 kg at 50 km/h, How much force would you need to apply on the wheels of your car through the breaks in order to be able to stop short of hitting the cat
A wedding ring (of diameter 1.7 cm) is tossed into the air and given a spin, resulting in an angular velocity of 12 rotations per second. The rotation axis is a diameter of the ring. Taking the magnitude of the Earth's magnetic field to be 4.3 10-5 T..
A block is pushed up an incline. The incline creates an angle of 22.0° with the horizontal. When the block is released, it has an initial velocity of 2.75 m/s. The coefficient of kinetic friction between the block and the inclined plane is 0.450. How..
Consider the crates in the figure where m1 = 45 kg and m2 = 12 kg. Assume that there is no friction between m1 and the table, Write Newton's second law for motion along both coordinate directions
A zookeeper and a monkey. The zookeeper shot a tranquilizer gun with an initial v=30m/s. The monkey was up on a tree 140m high. What is the monkeys speed during free fall
A large capacitance of 1.20 mF is needed for a certain application. Calculate the volume of Teflon alone in the capacitor
Assume that at sea-level the air pressure is 1.0 atm and the air density is 1.3 kg/m3. What would be the height of the atmosphere if the air density were constant
A thin ray of light enters a container ofroom-temperature liquid from the air. Its angle of incidence is49°. What is the index of refraction of the liquid
An athlete executing a long jump leaves the ground at a31.2^\circ angle and travels7.70 m. What was the takeoff speed in m/s?
The gauge pressure at the bottom of a pint of beer, at a depth of 14.6 cm, is 1450 Pa. What is the density of the beer
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