A small sphere with a mass of 441 g is moving upward along the vertical +y-axis when it encounters an electric field of 5.00 N/C
If, due to this field, the sphere suddenly acquires a horizontal acceleration of 13.0 m/s2 , what is the charge that it carries?
A) 1.15 C
B) -1.15 C
C) 1150 C
D) -1150 C
A
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A spaceship departs from the solar system (event A) and travels at a constant velocity to a distant star. It then returns at a constant velocity, finally returning to the solar system (event B). A clock on the spaceship registers which of the following kinds of time between these events?
A. Proper time B. Coordinate time C. Space time interval D. Proper time and space time interval E. Coordinate time and space time interval F. All three
During which type of lunar eclipse does the Moon remain longest in the Earth’s shadow?
A. penumbral B. partial C. total D. For all three types of eclipse, the Moon remains in the Earth’s shadow the same length of time. E. none of the above is accurate
Elliptical galaxies, with older stars, will be more likely to have evolved intelligences than the stars close to us in the Milky Way
Indicate whether the statement is true or false
A meterstick is shot from a meterstick projector at a speed of 0.90 c. How long will it be relative to an observer's frame of reference?
a. 2.3 m b. 0.91 m c. 1.0 m d. 0.44 m e. 0.81 m