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Gravitational infall: Calculate the required mass accumulation rate to the present Sun from r = 8 to r = RS (radius of sun) in order to get LS (Luminosity of sun ). How many years would it take to double the Sun's mass at this rate? How would the mass accretion affect the Earth's orbital period/distance from the Sun?
A commuter airplane starts from an airport and takes the route shown in the figure below. The plane first flies to city A located 175 km away in a direction 30.0° north of east. Find the angle in degrees west of north
The drawing shows a person (weight W = 582 N, L1 = 0.841 m, L2 = 0.406 m) doing push-ups. Find the normal force exerted by the floor on each hand
A car is designed to get its energy from a rotating flywheel (solid disk) with a radius of 1.00 m and a mass of 400 kg. Find the kinetic energy stored in the flywheel
air traffic controllers usually describe the position of an aircraft relative to the airport by altitude, What are the x, y, and z components (in meters) of hte position vector
A 0.33-m-long violin string has a mass of 0.89 g. The peg exerts a 45 N force on it. Determine the lowest frequency sound produced by the vibrating sting
a piece of wire is stretched from length l1 to a length of l2 step a and then from length l2 to length l3 step ba write
A car, moving along a straight stretch of high-way, begins toaccelerate at 0.0345 m/s2. It takes the car 70.9 s to cover 1 km.How fast was the car going when it first began to accelerate?
The intrinsic impedance and the wavelength of a uniform plane wave traveling in an unknown dielectric at 3 GHz are measured to be ~ 194 Ω and ~ 5 .14 cm respectively. Determine the constitutive parameters (i.e. εr, and μr) of the material.
Explain the phenomenon of resonance. Use the phase of the interfering waves to determine the conditions for and location of constructive and destructive resonance
upstream of a normal shock in air the pressure is 14.7 psia and the temperature is 528r. downstream of the shock the
300. V are applied to a motor with a windings resistance of 65.0 ohms. At the maximum motor speed the back emf is 155. V. Find the current in windings as the motor starts
In the figure, suppose that the separation between speakers A and B is 5.90 m and the speakers are vibrating in phase. They are playing identical 110-Hz tones, and the speed of sound is 343 m/s.
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