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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 3.99 × 1030 kg. Find the radius of the exoplanet\'s orbit.
Two pieces of optically flat glass (n = 1.50) touch at one edge and a separated by a thin stretched fiber at the opposite edge. How thick is the fiber
A small sphere whose mass is 7.00E-03 g. carries a charge of 2.00E-08 C. Calculate the surface charge density (in coulombs/meter^2) for the sheet
A 208.3 gram pendulum bob on a 1.92 meter long string is pulled to a height above its lowest position such that it makes an angle of 19.0 degrees with the vertical. Determine the speed of the pendulum bob
Determine the wave speed on the string and determine the speed of sound from the data given.
A lamp (R = 155 ), an electric heater (R = 27 ), and a fan (R = 51 ) are connected in parallel across a 118 V line. What power is expended in the heater
Air isn't a perfect electric insulator, but it has a very high resistivity of 3x10^13 omega*m. what fraction of the charge will flow across the air gap
A possible spacecraft design uses a solar sail made of aluminized plastic. As sunlight reflects off the sail, radiation pressure drives the spacecraft outward away from the sun. what is its acceleration at the radius of the Earth's orbit
A car rounds a curve that is banked inward. The radius of curvature of the road is R = 114, Find the maximum speed that the car can have without slipping
A constant force of 46.3 N, directed at 28.7o from horizontal, pulls a mass of 14.7 kg horizontally a distance of 3.09 m
A 2.5hp electric motor on a water well pumps water from 10m below the surface. The density of water is 1.0 kg per liter. How many liters of water does the motor pump in 2.0hr
A 11.0 kg monkey starts to climb a long rope to reach a banana located at a height of 6.50 m, Calculate the least amount of time the monkey could take to reach the banana without breaking the rope
With brakes fully applied, a 1670 kg car deccelerates from a speed of 77.0 km/hr. What is the change in the kinetic energy of the car
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