If we can solve the orbital motion of an eclipsing binary, we can find
a. the mass of each star.
b. the diameter of each star.
c. the distance to the binary.
d. all of the other choices.
e. the mass of each star and the diameter of each star.
e
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An object that is 3.4 mm tall is placed 25 cm from the vertex of a convex spherical mirror. The radius of curvature of the mirror has magnitude 73 cm
(a) How far is the image from the vertex of the mirror? (b) What is the height of the image? What will be an ideal response?
A satellite is in a circular orbit 600 km above the Earth's surface. The acceleration of gravity is 8.21 m/s2 at this altitude. The radius of the Earth is 6400 km. Determine the speed of the satellite, and the time to complete one orbit around the Earth.
What will be an ideal response?
A solid sphere, solid cylinder, and a hollow pipe all have equal masses and radii. If the three are released simultaneously at the top of an inclined plane, which will reach the bottom first?
A) sphere B) pipe C) cylinder D) they all reach bottom in the same time E) It depends on the angle of inclination.
Consider fully developed laminar flow of a fluid inside a wide rectangular duct with both the upper and lower surface at uniform surface temperature, as schematically shown in the figure below. The effect of the two sides of the duct is neglected (W>> H), and at a location far from the entrance the velocity distribution is assumed to be uniform, u(x) = Cu whereas the temperature distribution has a parabolic profile given by T(x)= Ts + CT (1 –(2x/H)2). From the given velocity and temperature distributions, calculate the Nusselt number, which is given by its definition as where Tb is the average bulk temperature of the flowing fluid at the specified location, and k is the thermal conductivity of the fluid.
GIVEN
Fully developed laminar flow of fluid inside rectangular duct
Uniform upper and lower surface temperature
Uniform velocity distribution u(x) = Cu
Parabolic temperature distribution T(x)= Ts + CT (1 –(2x/H)2
FIND
Nusselt number
SKETCH
