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Consider a visual binary star system with a period of 55.41 years. Its measured trigonometric parallax is 0.4217'' and, assuming that the plane of the orbit is in the plane of the sky, the true angular extent of the semi-major axis is 6.69''. The ratio of the distances of component A and component B from the center of the mass is A/B = 0.501
b) The absolute bolometric magnitude of component A is 1.42, and component B has an absolute bolometric magnitude of 9.03. Determine their luminosities. Express your answers in terms of the luminosity of the sun.
You're driving down the highway late one night at 17 {rm m}/{rm s} when a deer steps onto the road 45 {rm m} in front of you. Your reaction time before stepping on the brakes is 0.50 {rm s} and the maximum deceleration of your car is 12 {rm m/s^2}..
Treat the ball as a uniform, solid sphere, ignoring the finger holes. Illustrate what is the acceleration of the center of mass of the ball?
Maria throws Jackson a life preserver attached to a rope. Jackson's mass is 235 kg. What is the Net Force on Jackson
A diffraction grating has a line density of 580 . This grating produces a 1st order maximum at a distance of 2.52 from the central maximum on a screen which is 5.40 away
A ball is kicked with an initial velocity of 15.5 m/s in the horizontal direction and 10.5 m/s in the vertical direction, At what speed does the ball hit the ground in m/s
What is magnitude of the speed of the boat relative to a stationary shore observer. A person stands at a point that is 4 m from one of the speakers and 4.4 m from the other. Does the person hear the tone? Explain.
Two people with a combined mass of 123kg hop into an old car with worn-out shock absorbers. Find the total load supported by the springs
A person of mass 50 kg rides a loop the loop (vertical circular track) at an amusement park. find the normal force exerted at the bottom of the loop
400 L of water is at 4 oC. If it took a heat 600 seconds to heat this up to 6 oC, what is the power rating of the heater
Two identical positive charges exert a repulsive force of 6.2 multiplied by 10-9 N when separated by a distance of 3.4 multiplied by 10-10 m. Calculate the charge of each.
Two satellites are in circular orbits around a planet that has radius 9.00*10^6 m. One satellite has mass 77.0kg , What is the orbital speed of this second satellite
A line in the x-ray spectrum of gold has a wavelength of 18.5 pm(=18.5x10^-12 m) The emitted x-ray photons corresponds to a transition of the gold atom between two stationary states, the upper one of which has the energy -13.7 keV. What is the ene..
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