Observers in accelerating frames of reference can experience ________ forces which would not be felt in non-accelerating frames.
Fill in the blank(s) with the appropriate word(s).
inertial
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You push on a block on frictionless ice with a force of 8 N, causing it to accelerate at 2 m/s2 . The mass of the block is __________
Fill in the blank(s) with correct word
Spheres of Charge: In the figure, a conducting sphere of radius r1 = 0.050 m is placed at the center of a spherical conducting shell of inner radius r2 = 0.100 m and outer radius r3 = 0.140 m. The inner sphere carries an excess charge of -4.0 nC. The outer spherical shell carries a net excess charge of 3.0 nC. Calculate the magnitude of the electric field at the following distances r from the center of the spheres. (k = 1/4??0 = 9.0 × 109 N ? m2/C2) (a) r = 0.075 m (in the air space between spheres),(b) r = 0.120 m (in the metal of the spherical shell), and(c) r = 0.200 m (outside the spherical shell).
What will be an ideal response?
What is the Oort cloud?
A) It's not really a cloud at all, but rather refers to the trillion or so comets thought to orbit the Sun at great distances. B) It is another name for the cloud of gas from which our solar system was born. C) It is a great cloud of gas that resides far beyond the orbit of Pluto. D) It is a giant storm in the atmosphere of Saturn.
Scale the Milky Way down to the size of a compact disc. Which of the following best describes the size, shape, and distance of the Andromeda Galaxy on the same scale?
A) a compact disk a few meters away B) a pecan nut about 1 centimeter away C) a grapefruit about 1 kilometer away D) a grapefruit a few meters away E) a compact disk about the length of a football field away