A 1.1 kg seagull takes off from a piling along the California coast and accelerates within 0.50 s to a flight speed of 7.5 m/s along a slightly inclined path. At the end of the 0.50 s period, it is 5.3 m above its point of takeoff. What power was developed by the bird’s wings?
A. 180 W
B. 110 W
C. 52 W
D. 62 W
A. 180 W
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The length of a certain wire is kept same while it's radius is doubled. What is the new resistance of this wire?
Two concentric imaginary spherical surfaces of radius R and 2R respectively surround a positive point charge ?Q located at the center of the surfaces. When compared to the electric flux ?1 through the surface of radius R, the electric flux ?2 through the surface of radius 2R is
A.
.B.
.C.
D.
E.
Why is the radiation so intense in the region that traces Io's orbit around Jupiter (the Io torus)?
A) The region is full of gases that become ionized after they are released from volcanoes on Io. B) An orbital resonance between Io, Europa, and Ganymede makes the radiation intense. C) Jupiter's strong magnetic field makes the radiation intense everywhere, and the region around Io is no different than any other region. D) Io's gravity allows this region to capture huge numbers of charged particles from the solar wind.
You are playing a trombone and you want to play a much lower note than you are presently playing. What is one thing that you will have to do?
1.extend the slide 2.pull in the slide 3.leave the slide in the same position 4.Changing the pitch of the trombone has nothing to do with the slide position.