A airplane that is flying level needs to accelerate from a speed of 2.00 × 102 m/s to a speed of 2.40 × 102 m/s while it flies a distance of 1.20 km. What must be the acceleration of the plane?
A) 4.44 m/s2
B) 2.45 m/s2
C) 7.33 m/s2
D) 5.78 m/s2
E) 1.34 m/s2
C
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If the total translational kinetic energy of the molecules of oxygen in a container is 15 J at room temperature, what is the total rotational kinetic energy of these molecules?
a. 5 J b. 10 J c. 20 J d. 25 J e. 0 J
Why is Venus's day so long (a day-night cycle on Venus lasts for as long as 243 Earth day and night cycles)?
A. No one knows the reason. B. Venus's rotation time is very long compared to the time it takes to go once around the Sun. C. Because Venus's year is longer than a year on Earth. D. Venus's rotation time is very short compared to the time it takes to go once around the Sun. E. Because Venus's year is shorter than a year on Earth.
Dr. Chuck projects a ball horizontally from a lab bench. If the projection speed of the ball were greater, the time in the air would be
A) less. B) the same. C) greater.
A metallic sphere A of radius 1 cm with charge 450 nC hangs on an insulating thread inside an uncharged thin metallic spherical shell B of radius 2 cm. Next, A is made temporarily to touch the inner surface of B. How is the charge then shared between them?