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Astronomers discover an exoplanet (a planet of a star other than the Sun) that has an orbital period of 3.85 Earth years in its circular orbit around its sun, which is a star with a measured mass of 3.69 × 1030 kg. Find the radius of the exoplanet's orbit.
You can shoot an arrow straight up so that it reaches the top of a 25-m tall building.
Coulomb’s law for electrostatic force between two point charges and Newton’s law for gravitational force between two stationary point masses, both have inverse-square dependence on the distance between the charges/masses.
the 3.00 kg cube has edge lengths d = 6.00 cm and is mounted on an axle through its center, what is the period of the resulting SHM
Stone with a mass of 0.800 {rm kg} is attached to one end of a string 0.900 {rm m} long. The string will break if its tension exceeds 65.0 {rm N}. The stone is whirled in a horizontal circle on a frictionless tabletop; the other end of the string rem..
A baseball can be thrown from the outfield in two manners, one withno bounce at all and the other with a single bounce. Theorysays that the ball arrives sooner after the first bounce.
earth's speed in its orbit about the sun is about 30 km/s. What is earth's acceleration?
A world-class sprinter accelerates to his maximum speed in4.1 s. He then maintains this speedfor the remainder of a 100-m race, finishing with a total time of10.2 s. What is his average acceleration for the entire race
The critical angle for total internal reflection at a liquid-air interface is 41.0. If a ray of light traveling in air has an angle of incidence of 34.5 at the interface with respect to the normal, what angle does the refracted ray in the liquid ma..
A hydraulic jack has a pump piston of diameter 0.660 centimeter, and a load piston of 3.30 centimeter. Obtain the load which can be lifted
Two identical spaceships are traveling in the same direction. An observer on earth measures the first to have a speed .85c, What is the speed of the second spaceship
Three, and only three, bright fringes can be seen on either side of the central maximum when a grating is illuminated with light ( = 430 nm)
The air-release flap on a hot-air balloon is used to release hot air from the balloon when appropriate. On one hot-air balloon, the air release openings has an area of 0.5 m^2, and the filling opening has an area of 1 m^2.
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