Which is the correct description of the Sun's location within the Milky Way?
A) in the disc but at its outer edge
B) as Herschel found, very close to the Galactic center
C) in the disc and about one-half a galactic radius from the center
D) above the disc and about one-third of the galactic radius from the center
E) at the outer edge of the galactic bulge but in the plane of the disc
C
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________ optics greatly reduces the effect of atmospheric turbulence by deforming the shape of the mirror by computer control
Fill in the blank(s) with correct word
A heavy truck and a small truck roll down a hill. Neglecting friction, at the bottom of the hill the heavy truck has greater
A) speed. B) acceleration. C) momentum. D) all of the above E) none of the above
A 25-kg television set rests on four rubber pads that are on the floor, each one having a height of 1.0 cm and a radius of 0.60 cm. A horizontal force is applied to the television set
When the pads are just at the point of sliding over the floor, how far has the television set moved sideways due to the deformation of the pads? The coefficient of static friction between the rubber and the floor is 1.0 and the shear modulus of these rubber pads is 2.6 × 106 Pa. A) 4.2 mm B) 16 mm C) 2.1 mm D) 8.4 mm E) 1.1 mm
The force exerted on a current-carrying wire located in an external magnetic field is directly proportional to which of the following?
a. field strength c. both A and B b. current strength d. None of the above are valid.