Andrea and Chuck are riding on a merry-go-round. Andrea rides on a horse at the outer rim of the circular platform, twice as far from the center of the circular platform as Chuck, who rides on an inner horse. When the merry-go-round is rotating at a constant angular speed, Andrea's tangential speed is
1.twice Chuck's.
2.the same as Chuck's.
3.half of Chuck's.
4.impossible to determine.
1
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A 5.0-kg block is attached to an ideal massless spring whose spring constant is 125 N/m. The block is pulled from its equilibrium position at x = 0.00 m to a position at x = +0.687 m and is released from rest
The block then executes lightly damped oscillation along the x-axis, and the damping force is proportional to the velocity. When the block first returns to x = 0.00 m, its x component of velocity is -2.0 m/s and its x component of acceleration is +5.6 m/s2. (a) What is the magnitude of the acceleration of the block upon release at x = +0.687 m. (b) Find the damping constant b.
A 40-?C charge is positioned on the x axis at x = 4.0 cm. Where should a ?60-?C charge be placed to produce a net electric field of zero at the origin?
a. ?5.3 cm b. 5.7 cm c. 4.9 cm d. ?6.0 cm e. +6.0 cm
Four 20. ? resistors are connected in parallel. What is the equivalent resistance?
What will be an ideal response?
Betelgeuse is the bright red star representing the left shoulder of the constellation Orion. All the following statements about Betelgeuse are true. Which one can you infer from its red color?
A) Its surface is cooler than the surface of the Sun. B) It is much brighter than the Sun. C) It is much more massive than the Sun. D) It is moving away from us.