What is a perennial stream?
What will be an ideal response?
A stream that flows once a year
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A 1.00 nC charge is placed on the x-axis at x = - 1.00 m. A second 1.00 nC charge is placed on the x- axis at x = 1.00 m. A third charge of 1.00 nC is placed on the y-axis at y = - 1.00 m. A fourth charge is place on the y-axis at y = 1.00 m. What is the fourth charge if the electric field at the origin is zero?
A. 1.00 nC B. -1.00 nC C. 3.00 nC D. -3.00 nC E. 2.00 nC
Weight and g: At a distance of 14,000 km from the center of Planet Z-99, the acceleration due to gravity is 32 m/s2. What is the acceleration due to gravity at a point 28,000 km from the center of this planet?
A. 8.0 m/s2 B. 16 m/s2 C. 128 m/s2 D. 4.0 m/s2 E. 2.0 m/s2
You are on the surface of an object, and you have a fairly clear view out into space. Unfortunately, you are also very squashed. The light you observe from distant objects is slightly blueshifted
The surface of the object is composed primarily of carbon and oxygen, and the distance to the horizon seems about the same as that on Earth. By observing the sky for a few weeks, you realize that there are several planets orbiting your object. Where are you? A) You are on the surface of a neutron star. B) You are on the surface of the Earth. C) You are on the surface of a planet that is somewhat more massive than the Earth. D) You are on the surface of a white dwarf. E) You are "on" an accretion disk around a black hole.
Slanting Surfaces Without Friction: A 200-N sled of slides down a frictionless hillside that rises at 37° above the horizontal. What is the magnitude of the force that the hill exerts on the sled parallel to the surface of the hill?
A. 200 N B. 120 N C. 160 N D. 150 N E. 0 N