A pendulum is released from rest at position A and swings toward the vertical under the influence of gravity as depicted below
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Simple Pendulum: A pendulum of length L is suspended from the ceiling of an elevator. When the elevator is at rest the period of the pendulum is T. How does the period of the pendulum change when the elevator moves upward with constant acceleration?
A. The period does not change. B. The period increases. C. The period decreases. D. The period becomes zero. E. The period increases if the upward acceleration is more than g/2 but decreases if the upward acceleration is less than g/2.
Spherical Mirrors: A stature that is 3.0 cm tall statue is 24 cm in front of a concave mirror. The magnitude of the radius of curvature of the mirror is 20 cm.(a) Is the image real or virtual?(b) How far is the image from the mirror?(c) Is the image upright or inverted?(d) How tall is the image?
What will be an ideal response?
The main fuel for producing energy in the center of the sun is
A) helium. B) hydrogen. C) uranium. D) any radioactive material. E) oxygen.
Water pressurized to 3.5 × 10^5 Pa is flowing at 5.0 m/s in a horizontal pipe which contracts to 1/3 its former area. What are the pressure and velocity of the water after the contraction?
a. 2.5 × 10^5 Pa, 15 m/s b. 3.0 × 10^5 Pa, 10 m/s c. 3.0 × 10^5 Pa, 15 m/s d. 4.5 × 10^5 Pa, 1.5 m/s e. 5.5 × 10^5 Pa, 1.5 m/s