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Find the radius of the star Rigel, the bright blue star in the constellation Orion that radiates energy at a rate of 2.7*10^32W and has a surface temperature of 11,000K . Assume that the star is spherical. Use 5.67*10^-8W/m^2*K^4 for the Stefan-Boltzmann constant and express your answer numerically in meters to two significant figures. B.Find the radius of the star Procyon B, which radiates energy at a rate of 2.1*10^23W and has a surface temperature of 10,000K . Assume that the star is spherical.
Calculate Escape Velocity for Mars (mass = 6.42 x 1023 kg, radius = 3397km). Is it easier to launch a rocket from Mars than the Earth
A hollow aluminium cylinder is to be fitted over a steel piston. At 22°C the inside diameter of the cylinder is 99.2 percent of the outside diameter of the piston. To what common temperature must the two pieces be heated in order that the cylinder ju..
A 10-kg crate is placed in the bed of a truck at rest on horizontal ground. The truck accelerates uniformly at 1 m/s^2for 10 seconds. What is the sign of the work done on the crate
A student in an undergraduate physics lab is studying Archimede\'s principle of bouyancy. The student is given a brass cylinder and using a triple beam balance finds the mass to be 2.72 kg. calculate the volume of the cylinder
A spacecraft is in orbit around a planet. The radius of the orbit is 3.1 times the radius of the planet (which is R = 71455 km). What is the period of the spacecraft's orbit
The blue line of the hydrogen emission spectrum has a wavelength of 433.9 nm. Calculate the energy of one photon of this light
Given that C = 0.22 µF, and the initial plate charge is Q0. What is the resistance of the resistor across the capacitor
The left end of a long glass rod 6.00cm in diameter has a convex hemispherical surface 3.00cm in radius. obtain the refractive index of the liquid
A small circular hole 7.00 in diameter is cut in the side of a large water tank, 25.0 below the water level in the tank. The top of the tank is open to the air.
A toy train is pushed forward and released at x0=2.0 m with a speed of 2.0 m/s. What is the magnitude of the train's acceleration after its wheel begins to stick
In a television set the power needed to operate the picture tube comes from the secondary of a transformer. Find the current in the primary
Find the moment of inertia of a solid uniform sphere of radius R which has a spherical cavity of radius R/2. The spherical cavity is centered at a point R/2 from the center of the sphere. Take the axis of rotation to go through the center of the sphe..
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